{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T01:02:38Z","timestamp":1760058158015,"version":"build-2065373602"},"reference-count":41,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2025,3,20]],"date-time":"2025-03-20T00:00:00Z","timestamp":1742428800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"FCT\u2014Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["PTDC\/EAM-PEC\/29905\/2017","UID\/Multi\/04349\/2019"],"award-info":[{"award-number":["PTDC\/EAM-PEC\/29905\/2017","UID\/Multi\/04349\/2019"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Thermoelectric materials have considerable potential in the mitigation of the global energy crisis, through their ability to convert heat into electricity. This study aims to valorize natural resources, and potentially reduce production costs, by incorporating tetrahedrite\u2013tennantite (td) ores from the Portuguese Iberian Pyrite Belt into synthetic samples. The ore samples were collected in a mine waste at Barrig\u00e3o and as \u201cdirty-copper\u201d pockets of ore from the Neves Corvo mine. Subsequently, high-energy ball milling and hot pressing were employed in the production of thermoelectric materials. These are characterized by XRD, SEM\/EDS, and thermoelectrical properties. The complete dissolution of the dump material sulfides with the synthetic tetrahedrite constituents led to an increase in the amount of the tetrahedrite\u2013tennantite phase, which was made up of a tetrahedrite\u2013tennantite\u2013(Fe) solid solution. The thermoelectric characterization of these materials is provided, revealing that most of the combined synthetic ore samples displayed better results than the pristine tetrahedrite, mostly due to higher Seebeck coefficient values. Furthermore, the best thermoelectric performance is achieved with 10% of ore, where a power factor of 268 \u00b5W.K\u22122.m\u22121 is reached at room temperature.<\/jats:p>","DOI":"10.3390\/ma18061375","type":"journal-article","created":{"date-parts":[[2025,3,20]],"date-time":"2025-03-20T05:03:59Z","timestamp":1742447039000},"page":"1375","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Thermoelectric Properties of Tetrahedrites Produced from Mixtures of Natural and Synthetic Materials"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8134-243X","authenticated-orcid":false,"given":"Beatriz","family":"Santos","sequence":"first","affiliation":[{"name":"C2TN\u2014Center for Nuclear Sciences and Technologies, Department of Nuclear Sciences and Engineering, Instituto Superior T\u00e9cnico, University of Lisbon, 2695-066 Bobadela-LRS, Portugal"}]},{"given":"Lu\u00eds","family":"Esperto","sequence":"additional","affiliation":[{"name":"LNEG, Laborat\u00f3rio Nacional de Energia e Geologia, Estrada do Pa\u00e7o do Lumiar, 22, 1649-038 Lisboa, Portugal"}]},{"given":"Isabel","family":"Figueira","sequence":"additional","affiliation":[{"name":"LNEG, Laborat\u00f3rio Nacional de Energia e Geologia, Estrada do Pa\u00e7o do Lumiar, 22, 1649-038 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0440-8057","authenticated-orcid":false,"given":"Jo\u00e3o","family":"Mascarenhas","sequence":"additional","affiliation":[{"name":"LNEG, Laborat\u00f3rio Nacional de Energia e Geologia, Estrada do Pa\u00e7o do Lumiar, 22, 1649-038 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1855-7758","authenticated-orcid":false,"given":"Elsa","family":"Lopes","sequence":"additional","affiliation":[{"name":"C2TN\u2014Center for Nuclear Sciences and Technologies, Department of Nuclear Sciences and Engineering, Instituto Superior T\u00e9cnico, University of Lisbon, 2695-066 Bobadela-LRS, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3740-2965","authenticated-orcid":false,"given":"Rute","family":"Salgueiro","sequence":"additional","affiliation":[{"name":"LNEG, Laborat\u00f3rio Nacional de Energia e Geologia, Estrada da Portela, Bairro do Zambujal\u2013Alfragide, Apartado 7586, 2610-999 Amadora, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0306-1015","authenticated-orcid":false,"given":"Teresa","family":"Silva","sequence":"additional","affiliation":[{"name":"LNEG, Laborat\u00f3rio Nacional de Energia e Geologia, Estrada da Portela, Bairro do Zambujal\u2013Alfragide, Apartado 7586, 2610-999 Amadora, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8314-0695","authenticated-orcid":false,"given":"Jos\u00e9","family":"Correia","sequence":"additional","affiliation":[{"name":"LNEG, Laborat\u00f3rio Nacional de Energia e Geologia, Estrada do Pa\u00e7o do Lumiar, 22, 1649-038 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6338-8845","authenticated-orcid":false,"given":"Daniel","family":"de Oliveira","sequence":"additional","affiliation":[{"name":"LNEG, Laborat\u00f3rio Nacional de Energia e Geologia, Estrada da Portela, Bairro do Zambujal\u2013Alfragide, Apartado 7586, 2610-999 Amadora, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2640-3038","authenticated-orcid":false,"given":"Ant\u00f3nio","family":"Gon\u00e7alves","sequence":"additional","affiliation":[{"name":"C2TN\u2014Center for Nuclear Sciences and Technologies, Department of Nuclear Sciences and Engineering, Instituto Superior T\u00e9cnico, University of Lisbon, 2695-066 Bobadela-LRS, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1251-053X","authenticated-orcid":false,"given":"Filipe","family":"Neves","sequence":"additional","affiliation":[{"name":"LNEG, Laborat\u00f3rio Nacional de Energia e Geologia, Estrada do Pa\u00e7o do Lumiar, 22, 1649-038 Lisboa, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2025,3,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Ravindra, N.M., Jariwala, B., Ba\u00f1obre, A., and Maske, A. 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