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Resour Conserv Recycl <volume>74<\/volume>: : 1\u20137. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0921344913000396\" xlink:type=\"simple\">http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0921344913000396<\/ext-link>. Accessed 29 October 2013."},{"key":"ref2","doi-asserted-by":"crossref","first-page":"325","DOI":"10.1557\/mrs.2012.34","article-title":"Will metal scarcity impede routine industrial use?","volume":"37","author":"TE Graedel","year":"2012","journal-title":"MRS Bull"},{"key":"ref3","unstructured":"Van der Voet E, Salminen R, Eckelman M, Mudd G, Norgate T, <etal>et al<\/etal>.. (2013) Environmental Risks and Challenges of Anthropogenic Metals Flows and Cycles. A Report of the Working Group on the Global Metal Flows to the International Resource Panel. United Nations Environment Programme (UNEP)."},{"key":"ref4","volume":"36","unstructured":"Kleijn R, van der Voet E, Kramer GJ, van Oers L, van der Giesen C (2011) Metal requirements of low-carbon power generation. Energy <volume>36<\/volume>: : 5640\u20135648. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0360544211004518\" xlink:type=\"simple\">http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0360544211004518<\/ext-link>. Accessed 24 July 2013."},{"key":"ref5","doi-asserted-by":"crossref","unstructured":"Elshkaki A, Graedel TE (2013) Dynamic analysis of the global metals flows and stocks in electricity generation technologies. J Clean Prod. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0959652613004575\" xlink:type=\"simple\">http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0959652613004575<\/ext-link>. Accessed 24 July 2013.","DOI":"10.1016\/j.jclepro.2013.07.003"},{"key":"ref6","unstructured":"Graedel TE, Harper EM, Nassar NT, Reck BK (2013) On the materials basis of modern society. Proc Natl Acad Sci: 201312752. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.pnas.org\/content\/early\/2013\/11\/27\/1312752110\" xlink:type=\"simple\">http:\/\/www.pnas.org\/content\/early\/2013\/11\/27\/1312752110<\/ext-link>. Accessed 16 December 2013."},{"key":"ref7","volume":"15","unstructured":"Graedel TE, Allwood J, Birat J-P, Buchert M, Hagel\u00fcken C, <etal>et al<\/etal>.. (2011) What Do We Know About Metal Recycling Rates? J Ind Ecol <volume>15<\/volume>: : 355\u2013366. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/j.1530-9290.2011.00342.x\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/j.1530-9290.2011.00342.x\/abstract<\/ext-link>. Accessed 1 October 2012."},{"key":"ref8","doi-asserted-by":"crossref","unstructured":"Chapman PF, Roberts F (1983) Metal resources and energy. Butterworths. 260 p.","DOI":"10.1016\/B978-0-408-10801-0.50007-9"},{"key":"ref9","unstructured":"Gupta CK (2004) Chemical Metallurgy. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/3527602003.fmatter\/summary\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/3527602003.fmatter\/summary<\/ext-link>. Accessed 24 July 2013."},{"key":"ref10","unstructured":"IEA (2010) Energy Technology Perspectives 2010: Scenarios and Strategies to 2050. Paris: International Energy Agency (IEA). Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.iea.org\/publications\/freepublications\/publication\/name,26100,en.html\" xlink:type=\"simple\">http:\/\/www.iea.org\/publications\/freepublications\/publication\/name,26100,en.html<\/ext-link>. Accessed 30 October 2013."},{"key":"ref11","volume":"24","unstructured":"Norgate T, Jahanshahi S (2011) Reducing the greenhouse gas footprint of primary metal production: Where should the focus be? Miner Eng <volume>24<\/volume>: : 1563\u20131570. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S089268751100286X\" xlink:type=\"simple\">http:\/\/www.sciencedirect.com\/science\/article\/pii\/S089268751100286X<\/ext-link>. Accessed 19 March 2013."},{"key":"ref12","volume":"15","unstructured":"Norgate TE, Jahanshahi S, Rankin WJ (2007) Assessing the environmental impact of metal production processes. J Clean Prod <volume>15<\/volume>: : 838\u2013848. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0959652606002320\" xlink:type=\"simple\">http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0959652606002320<\/ext-link>. Accessed 24 July 2013."},{"key":"ref13","volume":"23","unstructured":"Norgate T, Jahanshahi S (2010) Low grade ores \u2013 Smelt, leach or concentrate? Miner Eng <volume>23<\/volume>: : 65\u201373. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0892687509002568\" xlink:type=\"simple\">http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0892687509002568<\/ext-link>. Accessed 24 July 2013."},{"key":"ref14","unstructured":"Laznicka P (2006) Giant Metallic Deposits: Future Sources of Industrial Metals. Berlin Heidelberg: Springer. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/link.springer.com\/book\/10.1007\/978-3-642-12405-1\/page\/1\" xlink:type=\"simple\">http:\/\/link.springer.com\/book\/10.1007\/978-3-642-12405-1\/page\/1<\/ext-link>. Accessed 24 July 2013."},{"key":"ref15","volume":"8","unstructured":"Verhoef EV, Dijkema GPJ, Reuter MA (2004) Process Knowledge, System Dynamics, and Metal Ecology. J Ind Ecol <volume>8<\/volume>: : 23\u201343. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1162\/1088198041269382\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1162\/1088198041269382\/abstract<\/ext-link>. Accessed 24 July 2013."},{"key":"ref16","doi-asserted-by":"crossref","first-page":"7620","DOI":"10.1021\/es200563g","article-title":"Criticality of Non-Fuel Minerals: A Review of Major Approaches and Analyses","volume":"45","author":"L Erdmann","year":"2011","journal-title":"Environ Sci Technol"},{"key":"ref17","doi-asserted-by":"crossref","first-page":"1063","DOI":"10.1021\/es203534z","article-title":"Methodology of Metal Criticality Determination","volume":"46","author":"TE Graedel","year":"2012","journal-title":"Environ Sci Technol"},{"key":"ref18","volume":"48","unstructured":"Nuss P, Harper EM, Nassar NT, Reck BK, Graedel TE (2014) Criticality of Iron and Its Principal Alloying Elements. Environ Sci Technol <volume>48<\/volume>: : 4171\u20134177. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/dx.doi.org\/10.1021\/es405044w\" xlink:type=\"simple\">http:\/\/dx.doi.org\/10.1021\/es405044w<\/ext-link>. Accessed 10 April 2014."},{"key":"ref19","unstructured":"EC (2010) Critical raw materials for the EU. Brussels, Belgium: European Commission (EC). Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/ec.europa.eu\/enterprise\/policies\/rawmaterials\/documents\/index_en.htm\" xlink:type=\"simple\">http:\/\/ec.europa.eu\/enterprise\/policies\/rawmaterials\/documents\/index_en.htm<\/ext-link>. Accessed 27 December 2012."},{"key":"ref20","unstructured":"NRC (2008) Minerals, Critical Minerals, and the U.S. Economy..Washington, D.C: The National Academies Press. 264 p."},{"key":"ref21","unstructured":"EC (2014) Report on Critical Raw Materials for the EU. Brussels, Belgium: European Commission (EC). Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/ec.europa.eu\/enterprise\/policies\/raw-materials\/files\/docs\/crm-report-on-critical-raw-materials_en.pdf\" xlink:type=\"simple\">http:\/\/ec.europa.eu\/enterprise\/policies\/raw-materials\/files\/docs\/crm-report-on-critical-raw-materials_en.pdf<\/ext-link>. Accessed 10 June 2014."},{"key":"ref22","doi-asserted-by":"crossref","first-page":"1071","DOI":"10.1021\/es203535w","article-title":"Criticality of the Geological Copper Family","volume":"46","author":"NT Nassar","year":"2012","journal-title":"Environ Sci Technol"},{"key":"ref23","unstructured":"ISO (2006) Environmental Management - Life Cycle Assessment - Principles and Framework, ISO14040. Geneva, Switzerland: ISO."},{"key":"ref24","unstructured":"ISO (2006) Environmental Management - Life Cycle Assessment - Requirements and Guidelines, ISO 14044. Geneva, Switzerland: ISO."},{"key":"ref25","unstructured":"Classen M, Althaus H-J, Blaser S, Scharnhorst W, Tuchschmidt M, <etal>et al<\/etal>.. (2009) Life Cycle Inventories of Metals, Data v2.0. D\u00fcbendorf, CH: Ecoinvent Centre, ETh Zurich."},{"key":"ref26","volume":"10","unstructured":"Althaus H-J, Classen M (2005) Life Cycle Inventories of Metals and Methodological Aspects of Inventorying Material Resources in ecoinvent (7 pp). Int J Life Cycle Assess <volume>10<\/volume>: : 43\u201349. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.springerlink.com\/content\/x2118371742730hp\/abstract\/\" xlink:type=\"simple\">http:\/\/www.springerlink.com\/content\/x2118371742730hp\/abstract\/<\/ext-link>. Accessed 8 August 2012."},{"key":"ref27","unstructured":"Ecoinvent (2010) Ecoinvent Life Cycle Inventory database v2.2. Swiss Centre for Life Cycle Inventories. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.ecoinvent.ch\/\" xlink:type=\"simple\">http:\/\/www.ecoinvent.ch\/<\/ext-link>. Accessed 7 November 2010."},{"key":"ref28","unstructured":"European Commission (2011) ELCD core database version II. Joint research Centre - LCA Tools, Services and Data. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/lca.jrc.ec.europa.eu\/lcainfohub\/datasetArea.vm\" xlink:type=\"simple\">http:\/\/lca.jrc.ec.europa.eu\/lcainfohub\/datasetArea.vm<\/ext-link>. Accessed 31 May 2011."},{"key":"ref29","unstructured":"NREL (National Renewable Energy Laboratory) (2008) U.S. Life Cycle Inventory Database (U.S. LCI), v1.6.0. National Renewable Energy Laboratory (NREL). Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.nrel.gov\/lci\/database\/\" xlink:type=\"simple\">http:\/\/www.nrel.gov\/lci\/database\/<\/ext-link>. Accessed 26 January 2010."},{"key":"ref30","unstructured":"TU Delft (2001) IdEMAT Life Cycle Inventory Database. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.idemat.nl\/\" xlink:type=\"simple\">http:\/\/www.idemat.nl\/<\/ext-link>. Accessed 27 August 2012."},{"key":"ref31","unstructured":"UBA (2010) ProBas - Lebenszyklusdatenbank [Life Cycle Inventory Database]. Dessau (Germany); Freiburg (Germany): Umweltbundesamt (German Federal Environmental Agency) and \u00d6ko-Institut. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.probas.umweltbundesamt.de\/php\/index.php\" xlink:type=\"simple\">http:\/\/www.probas.umweltbundesamt.de\/php\/index.php<\/ext-link>. Accessed 22 November 2010."},{"key":"ref32","unstructured":"CPM (Centrum f\u00f6r Produktrelaterad Milj\u00f6analys) (2010) CPM LCA Database. Goteborg, Sweden: Center for Environmental Assessment of Product and Material Systems (CPM), Chalmers University of Technology. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.cpm.chalmers.se\/CPMDatabase\/\" xlink:type=\"simple\">http:\/\/www.cpm.chalmers.se\/CPMDatabase\/<\/ext-link>. Accessed 22 November 2010."},{"key":"ref33","unstructured":"PE International (2012) GaBi 6 life cycle inventory database. Leinfelden-Echterdingen, Germany: PE International. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/database-documentation.gabi-software.com\/america\/support\/gabi\/gabi-6-lci-documentation\/\" xlink:type=\"simple\">http:\/\/database-documentation.gabi-software.com\/america\/support\/gabi\/gabi-6-lci-documentation\/<\/ext-link>. Accessed 29 October 2013."},{"key":"ref34","unstructured":"Granta Design (2012) Granta: CES Selector materials selection software. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.grantadesign.com\/products\/ces\/\" xlink:type=\"simple\">http:\/\/www.grantadesign.com\/products\/ces\/<\/ext-link>. Accessed 13 August 2012."},{"key":"ref35","unstructured":"Sutter J (2007) Life Cycle Inventories of Highly Pure Chemicals. D\u00fcbendorf, CH: Ecoinvent Centre, ETh Zurich."},{"key":"ref36","unstructured":"Althaus H-J, Hischier R, Osses M, Primas A, Hellweg S, <etal>et al<\/etal>.. (2007) Life Cycle Inventories of Chemicals Data v2.0. D\u00fcbendorf, CH: Ecoinvent Centre, ETh Zurich."},{"key":"ref37","unstructured":"Kellenberger D, Althaus HJ, Kuenniger T, Lehmann M (2007) Life Cycle Inventory of Building Products. Duebendorf, Switzerland."},{"key":"ref38","unstructured":"Giegrich J, Liebich A, Lauwigi C, Reinhardt J (2012) Indikatoren\/Kennzahlen f\u00fcr den Rohstoffverbrauch im Rahmen der Nachhaltigkeits-diskussion. Dessau-Ro\u03b2lau, Germany: UMWELTBUNDESAMT. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.uba.de\/uba-info-medien\/4237.html\" xlink:type=\"simple\">http:\/\/www.uba.de\/uba-info-medien\/4237.html<\/ext-link>. Accessed 5 November 2012."},{"key":"ref39","doi-asserted-by":"crossref","unstructured":"H\u00e4ussinger P, Glatthaar R, Rhode W, Kick H, Benkmann C, <etal>et al<\/etal>.. (2000) Noble Gases. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a17_485\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a17_485\/abstract<\/ext-link>. Accessed 11 October 2013.","DOI":"10.1002\/14356007.a17_485"},{"key":"ref40","volume":"15","unstructured":"Gruber PW, Medina PA, Keoleian GA, Kesler SE, Everson MP, <etal>et al<\/etal>.. (2011) Global Lithium Availability. J Ind Ecol <volume>15<\/volume>: : 760\u2013775. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/j.1530-9290.2011.00359.x\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/j.1530-9290.2011.00359.x\/abstract<\/ext-link>. Accessed 9 May 2013."},{"key":"ref41","unstructured":"USGS (2011) Mineral Commodity Summaries 2011. Reston, VA: U.S. Geological Survey. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/minerals.er.usgs.gov\/minerals\/pubs\/commodity\/\" xlink:type=\"simple\">http:\/\/minerals.er.usgs.gov\/minerals\/pubs\/commodity\/<\/ext-link>. Accessed 31 August 2012."},{"key":"ref42","doi-asserted-by":"crossref","unstructured":"Cunningham LD (2004) Beryllium Recycling in the United States in 2000. In: Sibley SF, editor. Flow Studies for Recycling Metal Commodities in the United States. Reston, VA: U.S. Department of the Interior, U.S. Geological Survey (USGS). Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/pubs.usgs.gov\/circ\/c1196p\/c1196p.pdf\" xlink:type=\"simple\">http:\/\/pubs.usgs.gov\/circ\/c1196p\/c1196p.pdf<\/ext-link>. Accessed 28 August 2013.","DOI":"10.3133\/cir1196P"},{"key":"ref43","doi-asserted-by":"crossref","unstructured":"Petzow G, Aldinger F, J\u00f6nsson S, Welge P, van Kampen V, <etal>et al<\/etal>.. (2000) Beryllium and Beryllium Compounds. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a04_011.pub2\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a04_011.pub2\/abstract<\/ext-link>. Accessed 15 December 2012.","DOI":"10.1002\/14356007.a04_011"},{"key":"ref44","unstructured":"BeST (2013) Beryllium Facts and Figures. Beryllium Sci Technol Assoc BeST. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/beryllium.eu\/about-beryllium-and-beryllium-alloys\/facts-and-figures\/beryllium-extraction\/\" xlink:type=\"simple\">http:\/\/beryllium.eu\/about-beryllium-and-beryllium-alloys\/facts-and-figures\/beryllium-extraction\/<\/ext-link>. Accessed 28 August 2013."},{"key":"ref45","unstructured":"Mc Neil D (2013) Beryllium. Roskill Mineral Services. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/beryllium.eu\/?wpfb_dl=30\" xlink:type=\"simple\">http:\/\/beryllium.eu\/?wpfb_dl=30<\/ext-link>. Accessed 28 August 2013."},{"key":"ref46","unstructured":"Materion (2013) Personal communication. Materion Corporation."},{"key":"ref47","unstructured":"USGS (2008) 2008 Minerals Yearbook. Reston, VA: U.S. Geological Survey."},{"key":"ref48","doi-asserted-by":"crossref","unstructured":"Smith RA (2000) Boric Oxide, Boric Acid, and Borates. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a04_263\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a04_263\/abstract<\/ext-link>. Accessed 10 October 2013.","DOI":"10.1002\/14356007.a04_263"},{"key":"ref49","doi-asserted-by":"crossref","unstructured":"Kenny M, Oates T (2007) Lime and Limestone. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a15_317.pub2\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a15_317.pub2\/abstract<\/ext-link>. Accessed 9 September 2013.","DOI":"10.1002\/14356007.a15_317.pub2"},{"key":"ref50","doi-asserted-by":"crossref","unstructured":"Hluchan SE, Pomerantz K (2006) Calcium and Calcium Alloys. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a04_515.pub2\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a04_515.pub2\/abstract<\/ext-link>. Accessed 9 September 2013.","DOI":"10.1002\/14356007.a04_515.pub2"},{"key":"ref51","unstructured":"Vrana LM (2000) Calcium and Calcium Alloys. Kirk-Othmer Encyclopedia of Chemical Technology. John Wiley &amp; Sons, Inc. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/0471238961.0301120308090202.a01.pub3\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/0471238961.0301120308090202.a01.pub3\/abstract<\/ext-link>. Accessed 4 September 2013."},{"key":"ref52","unstructured":"World Bank (2012) World Data Bank. World Dev Indic WDI Glob Dev Finance GDF. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/databank.worldbank.org\/ddp\/home.do?Step=12&id=4&CNO=2\" xlink:type=\"simple\">http:\/\/databank.worldbank.org\/ddp\/home.do?Step = 12&amp;id = 4&amp;CNO = 2<\/ext-link>. Accessed 31 October 2012."},{"key":"ref53","unstructured":"USGS (2010) 2010 Minerals Yearbook. Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey."},{"key":"ref54","unstructured":"InfoMine (2011) Calcium Metal: Production, Market and Forecast in Russia and in the World. Moscow: InfoMine Research Group. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/eng.infomine.ru\/files\/catalog\/380\/file_380_eng.pdf\" xlink:type=\"simple\">http:\/\/eng.infomine.ru\/files\/catalog\/380\/file_380_eng.pdf<\/ext-link>. Accessed 21 October 2013."},{"key":"ref55","unstructured":"USGS (2009) Mineral Commodity Summaries 2009. Reston, VA: U.S. Geological Survey. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/minerals.er.usgs.gov\/minerals\/pubs\/commodity\/\" xlink:type=\"simple\">http:\/\/minerals.er.usgs.gov\/minerals\/pubs\/commodity\/<\/ext-link>. Accessed 31 August 2012."},{"key":"ref56","doi-asserted-by":"crossref","unstructured":"McGill I (2000) Rare Earth Elements. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a22_607\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a22_607\/abstract<\/ext-link>. Accessed 8 November 2012.","DOI":"10.1002\/14356007.a22_607"},{"key":"ref57","unstructured":"USGS (2012) 2012 Minerals Yearbook. Reston, VA: U.S. Geological Survey."},{"key":"ref58","volume":"108","unstructured":"Wang W, Pranolo Y, Cheng CY (2011) Metallurgical processes for scandium recovery from various resources: A review. Hydrometallurgy <volume>108<\/volume>: : 100\u2013108. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0304386X11000648\" xlink:type=\"simple\">http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0304386X11000648<\/ext-link>. Accessed 6 September 2013."},{"key":"ref59","unstructured":"USGS (2013) Mineral Commodity Summaries 2013. Reston, VA: U.S. Geological Survey. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/minerals.er.usgs.gov\/minerals\/pubs\/commodity\/\" xlink:type=\"simple\">http:\/\/minerals.er.usgs.gov\/minerals\/pubs\/commodity\/<\/ext-link>. Accessed 31 August 2012."},{"key":"ref60","unstructured":"Ashby MF, Miller A, Rutter F, Seymour C, Wegst UGK (2012) CES EduPack for Eco Design \u2014 A White Paper. Cambridge, UK: Granta Design Ltd."},{"key":"ref61","doi-asserted-by":"crossref","unstructured":"Woolery M (2000) Vanadium Compounds. Kirk-Othmer Encyclopedia of Chemical Technology. John Wiley &amp; Sons, Inc. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/0471238961.2201140123151512.a01.pub2\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/0471238961.2201140123151512.a01.pub2\/abstract<\/ext-link>. Accessed 18 September 2012.","DOI":"10.1002\/0471238961.2201140123151512.a01"},{"key":"ref62","unstructured":"Liddell N, Spring S, Welch C, Lucas A (2011) Vanadium Sector Review. Ocean Equities Ltd. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.niplats.com.au\/media\/articles\/Investor---Research\/20110719-Ocean-Equities-Vanadium-Sector-Review---July-2011-261\/Vanadium-Thematic-Ocean-Equities-Research-July-2011\" xlink:type=\"simple\">http:\/\/www.niplats.com.au\/media\/articles\/Investor---Research\/20110719-Ocean-Equities-Vanadium-Sector-Review---July-2011-261\/Vanadium-Thematic-Ocean-Equities-Research-July-2011<\/ext-link>.pdf. Accessed 18 September 2012."},{"key":"ref63","unstructured":"RMG (2006) Raw Materials Data Software - The Mining Database. Stockholm, Sweden: Raw Materials Group."},{"key":"ref64","doi-asserted-by":"crossref","unstructured":"Greber JF (2000) Gallium and Gallium Compounds. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a12_163\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a12_163\/abstract<\/ext-link>. Accessed 10 November 2012.","DOI":"10.1002\/14356007.a12_163"},{"key":"ref65","doi-asserted-by":"crossref","unstructured":"Grund SC, Hanusch K, Breunig HJ, Wolf HU (2000) Antimony and Antimony Compounds. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a03_055.pub2\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a03_055.pub2\/abstract<\/ext-link>. Accessed 8 September 2012.","DOI":"10.1002\/14356007.a03_055"},{"key":"ref66","doi-asserted-by":"crossref","unstructured":"MacMillan JP, Park JW, Gerstenberg R, Wagner H, K\u00f6hler K, <etal>et al<\/etal>.. (2000) Strontium and Strontium Compounds. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a25_321\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a25_321\/abstract<\/ext-link>. Accessed 9 September 2012.","DOI":"10.1002\/14356007.a25_321"},{"key":"ref67","doi-asserted-by":"crossref","unstructured":"Hibbins SG (2000) Strontium and Strontium Compounds. Kirk-Othmer Encyclopedia of Chemical Technology. John Wiley &amp; Sons, Inc. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/0471238961.1920181508090202.a01.pub2\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/0471238961.1920181508090202.a01.pub2\/abstract<\/ext-link>. Accessed 9 September 2012.","DOI":"10.1002\/0471238961.1920181508090202.a01"},{"key":"ref68","unstructured":"Coope B (2006) Spain&apos;s celestite celebration. Industrial Minerals (IM). Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.indmin.com\/pdfs\/697\/67081\/200607042.pdf\" xlink:type=\"simple\">http:\/\/www.indmin.com\/pdfs\/697\/67081\/200607042.pdf<\/ext-link>. Accessed 3 September 2013."},{"key":"ref69","doi-asserted-by":"crossref","unstructured":"Nielsen RH, Wilfing G (2000) Zirconium and Zirconium Compounds. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a28_543.pub2\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a28_543.pub2\/abstract<\/ext-link>. Accessed 27 August 2012.","DOI":"10.1002\/14356007.a28_543"},{"key":"ref70","unstructured":"Gambogi J (2011) Zirconium and Hafnium. 2010 Minerals Yearbook. U.S. Geological Service (USGS)."},{"key":"ref71","doi-asserted-by":"crossref","unstructured":"Nielsen RH, Wilfing G (2000) Hafnium and Hafnium Compounds. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a12_559.pub2\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a12_559.pub2\/abstract<\/ext-link>. Accessed 27 August 2012.","DOI":"10.1002\/14356007.a12_559"},{"key":"ref72","unstructured":"Lundberg M (2012) Environmental analysis of zirconium alloy production. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/uu.diva-portal.org\/smash\/record.jsf?pid=diva2:475527\" xlink:type=\"simple\">http:\/\/uu.diva-portal.org\/smash\/record.jsf?pid=diva2:475527<\/ext-link>. Accessed 27 August 2012."},{"key":"ref73","unstructured":"Cardarelli F (2008) Materials Handbook: A Concise Desktop Reference. Springer. 1365 p."},{"key":"ref74","volume":"4","unstructured":"Miller GL (1954) Arc melting Kroll zirconium sponge. Vacuum <volume>4<\/volume>: : 168\u2013175. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0042207X54800066\" xlink:type=\"simple\">http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0042207X54800066<\/ext-link>. Accessed 22 August 2012."},{"key":"ref75","unstructured":"Munnoch S (2012) Hafnium. Minor Metals Trade Association (MMTA). Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.mmta.co.uk\/uploaded_files\/Hafnium%20MJ.pdf\" xlink:type=\"simple\">http:\/\/www.mmta.co.uk\/uploaded_files\/Hafnium%20MJ.pdf<\/ext-link>. Accessed 27 August 2012."},{"key":"ref76","unstructured":"USGS (2011) Zirconium and Hafnium. 2011 Mineral Commodity Summaries. U.S. Geological Survey. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/minerals.usgs.gov\/minerals\/pubs\/commodity\/zirconium\/mcs-2011-zirco.pdf\" xlink:type=\"simple\">http:\/\/minerals.usgs.gov\/minerals\/pubs\/commodity\/zirconium\/mcs-2011-zirco.pdf<\/ext-link>. Accessed 27 August 2012."},{"key":"ref77","unstructured":"IAMGOLD (2009) Niobec Tour Presentation. IAMGOLD Corporation. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.iamgold.com\/Theme\/IAmGold\/files\/presentations\/Niobec%20Tour%202009%20-%20%20Niobec20Presentation%20FINAL.pdf\" xlink:type=\"simple\">http:\/\/www.iamgold.com\/Theme\/IAmGold\/files\/presentations\/Niobec%20Tour%202009%20-%20%20Niobec%20Presentation%20FINAL.pdf<\/ext-link>. Accessed 17 September 2012."},{"key":"ref78","unstructured":"Albrecht S, Cymorek C, Eckert J (2000) Niobium and Niobium Compounds. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a17_251.pub2\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a17_251.pub2\/abstract<\/ext-link>. Accessed 16 September 2012."},{"key":"ref79","unstructured":"IPPC (2001) Reference Document on Best Available Techniques in the Non Ferrous Metals Industries. Integrated Pollution Prevention and Control (IPPC), European Commission. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/circa.europa.eu\/Public\/irc\/env\/ippc_brefs\/library?l=\/bref_ferrous_metals_1\/ferrous_metals_enpdf\/_EN_1.0_&a=d\" xlink:type=\"simple\">http:\/\/circa.europa.eu\/Public\/irc\/env\/ippc_brefs\/library?l = \/bref_ferrous_metals_1\/ferrous_metals_enpdf\/_EN_1.0_&amp;a = d<\/ext-link>. Accessed 15 September 2012."},{"key":"ref80","unstructured":"BIO Intelligence Service (2010) Environmental Impacts of some Raw Materials through LCA Methods. Paris."},{"key":"ref81","doi-asserted-by":"crossref","unstructured":"Graf GG (2000) Tin, Tin Alloys, and Tin Compounds. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a27_049\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a27_049\/abstract<\/ext-link>. Accessed 10 November 2012.","DOI":"10.1002\/14356007.a27_049"},{"key":"ref82","doi-asserted-by":"crossref","unstructured":"Kresse R, Baudis U, J\u00e4ger P, Riechers HH, Wagner H, <etal>et al<\/etal>.. (2000) Barium and Barium Compounds. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a03_325.pub2\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a03_325.pub2\/abstract<\/ext-link>. Accessed 9 September 2012.","DOI":"10.1002\/14356007.a03_325"},{"key":"ref83","unstructured":"Chinese Society of Rare Earths (2010) Chinese Rare Earth Yearbook 2010 (in Chinese). Beijing, China."},{"key":"ref84","volume":"45","unstructured":"Du X, Graedel TE (2011) Global In-Use Stocks of the Rare Earth Elements: A First Estimate. Environ Sci Technol <volume>45<\/volume>: : 4096\u20134101. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/dx.doi.org\/10.1021\/es102836s\" xlink:type=\"simple\">http:\/\/dx.doi.org\/10.1021\/es102836s<\/ext-link>. Accessed 22 September 2013."},{"key":"ref85","doi-asserted-by":"crossref","unstructured":"Gupta CK, Krishnamurthy N (2004) Extractive Metallurgy of Rare Earths. CRC Press. 537 p.","DOI":"10.4324\/9780203413029"},{"key":"ref86","unstructured":"Dahmus J, Gutowski T (2004) An environmental analysis of machining Anaheim, California, USA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/stuff.mit.edu\/afs\/athena.mit.edu\/course\/2\/2.810\/www\/ASME2004-62600.pdf\" xlink:type=\"simple\">http:\/\/stuff.mit.edu\/afs\/athena.mit.edu\/course\/2\/2.810\/www\/ASME2004-62600.pdf<\/ext-link>. Accessed 8 April 2013."},{"key":"ref87","unstructured":"Millensifer TA (2000) Rhenium and Rhenium Compounds. Kirk-Othmer Encyclopedia of Chemical Technology. John Wiley &amp; Sons, Inc. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/0471238961.1808051420180509.a01.pub3\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/0471238961.1808051420180509.a01.pub3\/abstract<\/ext-link>. Accessed 23 July 2013."},{"key":"ref88","unstructured":"Vermaak CF (1995) Platinum-group metals: a global perspective. Mintek. 312 p."},{"key":"ref89","unstructured":"CPM (2012) The CPM Platinum Group Metals Yearbook 2012. 26th ed. New York: Euromoney Books. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.cpmgroup.com\/shop\/product\/precious-metals\/cpm-platinum-group-metals-yearbook-2012\" xlink:type=\"simple\">http:\/\/www.cpmgroup.com\/shop\/product\/precious-metals\/cpm-platinum-group-metals-yearbook-2012<\/ext-link>. Accessed 24 September 2013."},{"key":"ref90","unstructured":"Johnson Matthey (2013) Platinum 2013. Royston, United Kingdom: Johnson Matthey."},{"key":"ref91","unstructured":"Naldrett AJ (2011) Fundamentals of Magmatic Sulfide Deposits. In: Li C, Ripley EM, editors. Magmatic Ni-Cu and PGE deposits: geology, geochemistry, and genesis. Reviews in economic geology. Littleton, CO: Society of Economic Geologists. pp. 1\u201350."},{"key":"ref92","unstructured":"USBM (1985) Mineral Facts and Problems: 1985 Edition. Washington D.C.: U.S. Department of the Interior, U.S. Bureau of Mines."},{"key":"ref93","unstructured":"DeVito SC, Brooks WE (2000) Mercury. Kirk-Othmer Encyclopedia of Chemical Technology. John Wiley &amp; Sons, Inc. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/0471238961.1305180304052209.a01.pub2\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/0471238961.1305180304052209.a01.pub2\/abstract<\/ext-link>. Accessed 8 September 2012."},{"key":"ref94","unstructured":"EC (2004) Mercury Flows in Europe and the World: The Impacts of Decommissioned Chlor-Alkali Plants. Brussels: European Commission. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/ec.europa.eu\/environment\/chemicals\/mercury\/pdf\/report.pdf\" xlink:type=\"simple\">http:\/\/ec.europa.eu\/environment\/chemicals\/mercury\/pdf\/report.pdf<\/ext-link>. Accessed 8 September 2012."},{"key":"ref95","doi-asserted-by":"crossref","unstructured":"Micke H, Wolf HU (2000) Thallium and Thallium Compounds. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a26_607\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a26_607\/abstract<\/ext-link>. Accessed 8 September 2012.","DOI":"10.1002\/14356007.a26_607"},{"key":"ref96","unstructured":"USGS (1999) Metal Prices in the United States Through 1998. Reston, VA: U.S. Geological Survey. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/minerals.usgs.gov\/minerals\/pubs\/metal_prices\/metal_prices1998.pdf\" xlink:type=\"simple\">http:\/\/minerals.usgs.gov\/minerals\/pubs\/metal_prices\/metal_prices1998.pdf<\/ext-link>. Accessed 5 November 2012."},{"key":"ref97","doi-asserted-by":"crossref","unstructured":"Sutherland CA, Milner EF, Kerby RC, Teindl H, Melin A, <etal>et al<\/etal>.. (2000) Lead. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a15_193.pub2\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a15_193.pub2\/abstract<\/ext-link>. Accessed 31 May 2013.","DOI":"10.1002\/14356007.a15_193"},{"key":"ref98","volume":"48","unstructured":"Naumov A (2007) World market of bismuth: A review. Russ J Non-Ferr Met <volume>48<\/volume>: : 10\u201316. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.springerlink.com\/content\/n300673l6p7n271n\/abstract\/\" xlink:type=\"simple\">http:\/\/www.springerlink.com\/content\/n300673l6p7n271n\/abstract\/<\/ext-link>. Accessed 7 September 2012."},{"key":"ref99","doi-asserted-by":"crossref","first-page":"3084","DOI":"10.1021\/es0709829","article-title":"Life Cycle Assessment of Japanese High-Temperature Conductive Adhesives","volume":"42","author":"ASG Andrae","year":"2008","journal-title":"Environ Sci Technol"},{"key":"ref100","doi-asserted-by":"crossref","unstructured":"Stoll W (2000) Thorium and Thorium Compounds. Ullmann&apos;s Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH &amp; Co. KGaA. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a27_001\/abstract\" xlink:type=\"simple\">http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/14356007.a27_001\/abstract<\/ext-link>. Accessed 27 August 2012.","DOI":"10.1002\/14356007.a27_001"},{"key":"ref101","doi-asserted-by":"crossref","unstructured":"Cuney M (2012) Uranium and Thorium: The Extreme Diversity of the Resources of the World&apos;s Energy Minerals. In: Sinding-Larsen R, Wellmer F-W, editors. Non-Renewable Resource Issues. International Year of Planet Earth. Springer Netherlands. pp. 91\u2013129. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/link.springer.com\/chapter\/10.1007\/978-90-481-8679-2_6\" xlink:type=\"simple\">http:\/\/link.springer.com\/chapter\/10.1007\/978-90-481-8679-2_6<\/ext-link>. Accessed 21 March 2013.","DOI":"10.1007\/978-90-481-8679-2_6"},{"key":"ref102","unstructured":"Schmidt G (2013) Description and critical environmental evaluation of the REE refining plant LAMP near Kuantan\/Malaysia. Darmstadt, Germany: Oeko Institute e.V. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.oeko.de\/oekodoc\/1628\/2013-001-en.pdf\" xlink:type=\"simple\">http:\/\/www.oeko.de\/oekodoc\/1628\/2013-001-en.pdf<\/ext-link>. Accessed 18 March 2013."},{"key":"ref103","unstructured":"Thomson Reuters (2012) World Silver Survey 2012 - A Summary. Washington D.C.: The Silver Institute. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/www.silverinstitute.org\/site\/wp-content\/uploads\/2012\/07\/wss12sum.pdf\" xlink:type=\"simple\">https:\/\/www.silverinstitute.org\/site\/wp-content\/uploads\/2012\/07\/wss12sum.pdf<\/ext-link>. Accessed 22 October 2013."},{"key":"ref104","unstructured":"USGS (2012) Mineral Commodity Summaries 2012. Reston, VA: U.S. Geological Survey. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/minerals.er.usgs.gov\/minerals\/pubs\/commodity\/\" xlink:type=\"simple\">http:\/\/minerals.er.usgs.gov\/minerals\/pubs\/commodity\/<\/ext-link>. Accessed 31 August 2012."},{"key":"ref105","unstructured":"Goedkoop M, Oele M, de Sch A, Vieira M (2008) SimaPro Database Manual - Methods library. Netherlands: PR\u00e9 Consultants. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.pre.nl\/download\/manuals\/DatabaseManualMethods.pdf\" xlink:type=\"simple\">http:\/\/www.pre.nl\/download\/manuals\/DatabaseManualMethods.pdf<\/ext-link>. Accessed 30 November 2010."},{"key":"ref106","unstructured":"Goedkoop M, Heijungs R, Huijbregts M, De Schryver A, Struijs J, <etal>et al<\/etal>.. (2009) ReCiPe 2008, A life cycle impact assessment method which comprises harmonised category indicators at the midpoint and the endpoint level; First edition Report I: Characterisation. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.lcia-recipe.net\" xlink:type=\"simple\">http:\/\/www.lcia-recipe.net<\/ext-link>. Accessed 27 March 2010."},{"key":"ref107","volume":"13","unstructured":"Rosenbaum RK, Bachmann TM, Gold LS, Huijbregts MAJ, Jolliet O, <etal>et al<\/etal>.. (2008) USEtox\u2014the UNEP-SETAC toxicity model: recommended characterisation factors for human toxicity and freshwater ecotoxicity in life cycle impact assessment. Int J Life Cycle Assess <volume>13<\/volume>: : 532\u2013546. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/link.springer.com\/article\/10.1007\/s11367-008-0038-4\" xlink:type=\"simple\">http:\/\/link.springer.com\/article\/10.1007\/s11367-008-0038-4<\/ext-link>. Accessed 6 April 2014."},{"key":"ref108","unstructured":"Doka G (2008) Life Cycle Inventory data ofmining waste:Emissions from sulfidic tailings disposal. Z\u00fcrich, Switzerland: Doka Life Cycle Assessments. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.doka.ch\/SulfidicTailingsDisposalDoka.pdf\" xlink:type=\"simple\">http:\/\/www.doka.ch\/SulfidicTailingsDisposalDoka.pdf<\/ext-link>. Accessed 1 December 2013."},{"key":"ref109","unstructured":"IEA (2008) Energy Technology Perspectives 2008: Scenarios and Strategies to 2050. Paris: International Energy Agency (IEA). Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.iea.org\/publications\/freepublications\/publication\/name,3771,en.html\" xlink:type=\"simple\">http:\/\/www.iea.org\/publications\/freepublications\/publication\/name,3771,en.html<\/ext-link>. Accessed 29 November 2013."},{"key":"ref110","unstructured":"IEA (2007) Tracking Industrial Energy Efficiency and CO2 Emissions. ISBN: 978-92-64-03016-9. Paris: International Energy Agency. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.iea.org\/textbase\/nppdf\/free\/2007\/tracking_emissions.pdf\" xlink:type=\"simple\">http:\/\/www.iea.org\/textbase\/nppdf\/free\/2007\/tracking_emissions.pdf<\/ext-link>. Accessed 3 January 2010."},{"key":"ref111","doi-asserted-by":"crossref","unstructured":"IEA (2010) World Energy Outlook 2010. Paris, France: International Energy Agency (IEA). Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.worldenergyoutlook.org\/media\/weo2010.pdf\" xlink:type=\"simple\">http:\/\/www.worldenergyoutlook.org\/media\/weo2010.pdf<\/ext-link>. Accessed 24 January 2014.","DOI":"10.1787\/weo-2010-en"},{"key":"ref112","doi-asserted-by":"crossref","unstructured":"Yellishetty M, Haque N, Dubreuil A (2012) Issues and Challenges in Life Cycle Assessment in the Minerals and Metals Sector: A Chance to Improve Raw Materials Efficiency. In: Sinding-Larsen R, Wellmer F-W, editors. Non-Renewable Resource Issues. Dordrecht: Springer Netherlands. pp. 229\u2013246. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/link.springer.com\/chapter\/10.1007\/978-90-481-8679-2_12?null\" xlink:type=\"simple\">http:\/\/link.springer.com\/chapter\/10.1007\/978-90-481-8679-2_12?null<\/ext-link>. Accessed 8 October 2012.","DOI":"10.1007\/978-90-481-8679-2_12"},{"key":"ref113","doi-asserted-by":"crossref","unstructured":"Bastian M, Heymann S, Jacomy M (2009) Gephi: an open source software for exploring and manipulating networks. Int AAAI Conf Weblogs Soc Media.","DOI":"10.1609\/icwsm.v3i1.13937"},{"key":"ref114","volume":"44","unstructured":"Allwood JM, Cullen JM, Milford RL (2010) Options for Achieving a 50% Cut in Industrial Carbon Emissions by 2050. Environ Sci Technol <volume>44<\/volume>: : 1888\u20131894. Available: <ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/dx.doi.org\/10.1021\/es902909k\" xlink:type=\"simple\">http:\/\/dx.doi.org\/10.1021\/es902909k<\/ext-link>. Accessed 13 May 2013."}],"container-title":["PLoS ONE"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/dx.plos.org\/10.1371\/journal.pone.0101298","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,7,14]],"date-time":"2023-07-14T21:37:15Z","timestamp":1689370635000},"score":1,"resource":{"primary":{"URL":"https:\/\/dx.plos.org\/10.1371\/journal.pone.0101298"}},"subtitle":[],"editor":[{"given":"Paul Jaak","family":"Janssen","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"editor"}]}],"short-title":[],"issued":{"date-parts":[[2014,7,7]]},"references-count":114,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2014,7,7]]}},"URL":"https:\/\/doi.org\/10.1371\/journal.pone.0101298","relation":{"has-part":[{"id-type":"doi","id":"https:\/\/doi.org\/10.1371\/journal.pone.0101298.g001","asserted-by":"subject"},{"id-type":"doi","id":"https:\/\/doi.org\/10.1371\/journal.pone.0101298.g002","asserted-by":"subject"},{"id-type":"doi","id":"https:\/\/doi.org\/10.1371\/journal.pone.0101298.g003","asserted-by":"subject"},{"id-type":"doi","id":"https:\/\/doi.org\/10.1371\/journal.pone.0101298.g004","asserted-by":"subject"},{"id-type":"doi","id":"https:\/\/doi.org\/10.1371\/journal.pone.0101298.g005","asserted-by":"subject"},{"id-type":"doi","id":"https:\/\/doi.org\/10.1371\/journal.pone.0101298.g006","asserted-by":"subject"},{"id-type":"doi","id":"https:\/\/doi.org\/10.1371\/journal.pone.0101298.g007","asserted-by":"subject"},{"id-type":"doi","id":"https:\/\/doi.org\/10.1371\/journal.pone.0101298.t001","asserted-by":"subject"},{"id-type":"doi","id":"https:\/\/doi.org\/10.1371\/journal.pone.0101298.s001","asserted-by":"subject"}]},"ISSN":["1932-6203"],"issn-type":[{"value":"1932-6203","type":"electronic"}],"subject":[],"published":{"date-parts":[[2014,7,7]]}}}