{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T01:56:26Z","timestamp":1791078986364,"version":"4.1.0"},"reference-count":44,"publisher":"National Academy of Sciences","issue":"48","content-domain":{"domain":["www.pnas.org"],"crossmark-restriction":true},"short-container-title":["Proc. Natl. Acad. Sci. U.S.A."],"published-print":{"date-parts":[[2008,12,2]]},"abstract":"<jats:p>\n                    Silver(I) hexacyanocobaltate(III), Ag\n                    <jats:sub>3<\/jats:sub>\n                    [Co(CN)\n                    <jats:sub>6<\/jats:sub>\n                    ], shows a large negative linear compressibility (NLC, linear expansion under hydrostatic pressure) at ambient temperature at all pressures up to our experimental limit of 7.65(2) GPa. This behavior is qualitatively unaffected by a transition at 0.19 GPa to a new phase Ag\n                    <jats:sub>3<\/jats:sub>\n                    [Co(CN)\n                    <jats:sub>6<\/jats:sub>\n                    ]-II, whose structure is reported here. The high-pressure phase also shows anisotropic thermal expansion with large uniaxial negative thermal expansion (NTE, expansion on cooling). In both phases, the NLC\/NTE effect arises as the rapid compression\/contraction of layers of silver atoms\u2014weakly bound via argentophilic interactions\u2014is translated via flexing of the covalent network lattice into an expansion along a perpendicular direction. It is proposed that framework materials that contract along a specific direction on heating while expanding macroscopically will, in general, also expand along the same direction under hydrostatic pressure while contracting macroscopically.\n                  <\/jats:p>","DOI":"10.1073\/pnas.0804789105","type":"journal-article","created":{"date-parts":[[2008,11,21]],"date-time":"2008-11-21T21:09:30Z","timestamp":1227301770000},"page":"18708-18713","update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":261,"title":["Large negative linear compressibility of Ag\n                    <sub>3<\/sub>\n                    [Co(CN)\n                    <sub>6<\/sub>\n                    ]"],"prefix":"10.1073","volume":"105","author":[{"given":"Andrew L.","family":"Goodwin","sequence":"first","affiliation":[{"name":"Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, United Kingdom;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David A.","family":"Keen","sequence":"additional","affiliation":[{"name":"ISIS Facility, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0QX, United Kingdom; and"},{"name":"Department of Physics, Clarendon Laboratory, Oxford University, Parks Road, Oxford OX1 3PU, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matthew G.","family":"Tucker","sequence":"additional","affiliation":[{"name":"ISIS Facility, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0QX, United Kingdom; and"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"341","published-online":{"date-parts":[[2008,12,2]]},"reference":[{"key":"e_1_3_3_1_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.279.5356.1522"},{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1038\/425667a"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1521-4095(200005)12:9<617::AID-ADMA617>3.0.CO;2-3"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1107\/S0108768185001902"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1063\/1.1661336"},{"key":"e_1_3_3_6_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.91.015503"},{"key":"e_1_3_3_7_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.60.R6945"},{"key":"e_1_3_3_8_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.17.2212"},{"key":"e_1_3_3_9_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.13.2605"},{"key":"e_1_3_3_10_2","doi-asserted-by":"publisher","DOI":"10.1038\/nature01265"},{"key":"e_1_3_3_11_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja0292187"},{"key":"e_1_3_3_12_2","volume-title":"Properties of Materials","author":"Newnham RE","year":"2005","unstructured":"RE Newnham Properties of Materials (Oxford Univ Press, Oxford, 2005)."},{"key":"e_1_3_3_13_2","article-title":"High pressure neutron powder diffraction studies of ferroelastic LaNbO4","author":"David WIF","unstructured":"WIF David, S Hull, RM Ibberson, High pressure neutron powder diffraction studies of ferroelastic LaNbO4. 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