[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"minerals:one:3849":3},{"id":4,"longid":5,"guid":6,"name":7,"shortcode_ima":8,"entrytype":9,"entrytype_text":10,"varietyof":11,"synid":11,"polytypeof":11,"groupid":11,"weighting":12,"nolocadd":13,"blacklisted":13,"mindat_formula":14,"mindat_formula_note":15,"ima_formula":14,"elements":16,"sigelements":20,"key_elements":21,"impurities":22,"cim":23,"ima_status":24,"ima_notes":11,"ima_history":11,"approval_year":11,"publication_year":11,"discovery_year":27,"strunz10ed1":28,"strunz10ed2":29,"strunz10ed3":30,"strunz10ed4":31,"dana8ed1":28,"dana8ed2":32,"dana8ed3":33,"dana8ed4":34,"csystem":35,"cclass":36,"spacegroup":37,"spacegroupset":38,"a":39,"b":40,"c":41,"alpha":38,"beta":42,"gamma":38,"aerror":43,"berror":36,"cerror":44,"alphaerror":11,"betaerror":36,"gammaerror":11,"va3":11,"z":44,"csmetamict":13,"commentcrystal":11,"twinning":45,"tranglide":11,"parting":11,"epitaxidescription":11,"morphology":46,"tlform":11,"hmin":47,"hmax":44,"hardtype":11,"vhnmin":48,"vhnmax":49,"vhnerror":11,"vhng":50,"vhns":11,"commenthard":11,"dmeas":51,"dmeas2":51,"dcalc":52,"dmeaserror":11,"dcalcerror":11,"commentdense":11,"lustre":53,"lustretype":53,"commentluster":54,"diapheny":55,"streak":56,"colour":57,"commentcolor":11,"colors":58,"streak_colors":63,"luminescence":11,"uv":64,"cleavage":65,"cleavagetype":66,"fracturetype":67,"tenacity":68,"commentbreak":11,"opticaltype":11,"opticalsign":11,"opticalalpha":38,"opticalalpha2":38,"opticalalphaerror":11,"opticalbeta":38,"opticalbeta2":38,"opticalbetaerror":11,"opticalgamma":38,"opticalgamma2":38,"opticalgammaerror":11,"opticalomega":38,"opticalomega2":38,"opticalomegaerror":11,"opticalepsilon":38,"opticalepsilon2":38,"opticalepsilonerror":11,"opticaln":38,"opticaln2":38,"opticalnerror":11,"optical2vcalc":38,"optical2vcalc2":38,"optical2vcalcerror":11,"optical2vmeasured":38,"optical2vmeasured2":38,"optical2vmeasurederror":11,"rimin":11,"rimax":11,"opticaldispersion":11,"opticalpleochroism":69,"opticalpleochorismdesc":70,"opticalbirefringence":11,"opticalcomments":11,"opticalcolour":71,"opticalinternal":11,"opticaltropic":72,"opticalanisotropism":73,"opticalbireflectance":11,"opticalextinction":11,"opticalr":74,"specdispm":11,"ir":11,"electrical":11,"magnetism":11,"thermalbehaviour":11,"other":11,"industrial":11,"occurrence":11,"otheroccurrence":75,"type_specimen_store":11,"description_short":76,"aboutname":77,"rock_parent":11,"rock_parent2":11,"rock_root":9,"rock_bgs_code":11,"meteoritical_code":11,"updttime":78,"reviewed_at":11,"variety_of":11,"varieties":79,"group_members":80,"associates":81,"confused_with":113,"type_localities":114,"occurrence_total":119,"citations":120,"images":223,"structures":328,"synonyms":335,"language_names":357,"wikidata_qid":454,"texts":455},3849,"1:1:3849:8","4c37ca1f-91ec-4f8b-91d1-dd09fea206cc","Sylvanite","Syv",0,"mineral",null,3174,false,"AgAuTe\u003Csub>4\u003C\u002Fsub>","Previously written as \u003Cf>(Ag,Au)^2Te^4\u003C\u002Ff>; but Au:Ag ratio usually is close to 1:1.",[17,18,19],"Ag","Au","Te",[17,18,19],[17,18,19],"Sb,Pb,Cu,Ni","3.3.9",[25,26],"APPROVED","GRANDFATHERED","1835","2","E","A","05","12","13","3","Monoclinic",5,12,"0","8.95","4.478","14.62","145.35",1,2,"Common on {100}","Short prismatic, thick tabular, skeletal, bladed, columnar, granular.",1.5,"154","172",100,"8.16","8.161","Metallic","Usually very bright","Opaque","Silver-white","Grey, white, pale yellow silver-white",[59,60,61,62],"gray","white","yellow","brown",[60],"Not fluorescent in UV","on {010}","Perfect","Irregular\u002FUneven,Sub-Conchoidal","brittle","Strong","Cream white to leather brown.","Creamy white","Anisotropic","Very strong","(43.2,53.6) 400,\r\n(45.4,55.9) 420,\r\n(47.7,57.9) 440,\r\n(49.7,59.6) 460,\r\n(50.9,60.8) 480,\r\n(51.8,61.8) 500,\r\n(52.3,62.6) 520,\r\n(52.5,62.9) 540,\r\n(52.5,63.0) 560,\r\n(52.5,63.0) 580,\r\n(52.6,62.9) 600,\r\n(52.8,62.7) 620,\r\n(53.0,62.4) 640,\r\n(53.3,62.2) 660,\r\n(53.6,62.2) 680,\r\n(54.1,62.4) 700","Low-temperature hydrothermal veins. Late forming mineral in medium to high-temperature hydrothermal veins.","Compare krennerite.","Named in 1835 by Louis Albert Necker-de Saussure for the Transylvania region of Romania, where it was first found, and Sylvanium, one of the names proposed for the newly discovered element tellurium, which it contains.","2025-08-11 12:14:24",[],[],[82,91,97,106],{"id":83,"name":84,"entrytype":9,"csystem":85,"ima_formula":86,"mindat_formula":86,"hmin":44,"hmax":87,"dmeas":88,"dcalc":89,"primary_image_id":90},147,"Altaite","Isometric","PbTe",3,"8.19","8.27",904,{"id":92,"name":93,"entrytype":44,"csystem":85,"ima_formula":11,"mindat_formula":94,"hmin":95,"hmax":87,"dmeas":11,"dcalc":11,"primary_image_id":96},1365,"Electrum","(Au,Ag)",2.5,53179,{"id":98,"name":99,"entrytype":9,"csystem":85,"ima_formula":100,"mindat_formula":101,"hmin":87,"hmax":102,"dmeas":103,"dcalc":104,"primary_image_id":105},1721,"Goldfieldite","(Cu\u003Csub>4\u003C\u002Fsub>◻\u003Csub>2\u003C\u002Fsub>)Cu\u003Csub>6\u003C\u002Fsub>Te\u003Csub>4\u003C\u002Fsub>S\u003Csub>13\u003C\u002Fsub>","(Cu\u003Csub>4\u003C\u002Fsub>◻\u003Csub>2\u003C\u002Fsub>)(Cu\u003Csub>4\u003C\u002Fsub>Cu\u003Csup>+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>)Te\u003Csub>4\u003C\u002Fsub>S\u003Csub>12\u003C\u002Fsub>S",3.5,"4.95","4.935",10152,{"id":107,"name":108,"entrytype":9,"csystem":85,"ima_formula":109,"mindat_formula":109,"hmin":95,"hmax":87,"dmeas":110,"dcalc":111,"primary_image_id":112},3180,"Petzite","Ag\u003Csub>3\u003C\u002Fsub>AuTe\u003Csub>2\u003C\u002Fsub>","8.7","8.74",19202,[],[115],{"id":116,"txt":117,"latitude":11,"longitude":11,"country":118},5999,"Baia de Arieș, Alba County, Romania","Romania",377,[121,125,129,133,137,141,146,150,155,159,162,166,170,174,179,184,189,194,199,203,207,210,214,218],{"id":122,"year":123,"html":124,"doi":11},16124850,1785,"von Reichenstein (1785) Phys. Arb. Wien: 3: 48.",{"id":126,"year":127,"html":128,"doi":11},16124851,1790,"von Born (1790) 2: 467.",{"id":130,"year":131,"html":132,"doi":11},16772233,1802,"Klaproth, M. H. (1802) LLXXIII. Chemische Untersuchung der siebenbürgischen Golderze, B. Schrifterz. In \u003Ci>Beiträge zur chemischen Kenntniss der Mineralkörper\u003C\u002Fi> Vol. 3. Rottmann. p.16-19. \u003Ca target='_blank' href='https:\u002F\u002Fwww.e-rara.ch\u002Fdownload\u002Fpdf\u002F12724676.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":134,"year":135,"html":136,"doi":11},18530124,1830,"Beudant, François-Sulpice (1830) \u003Ci>Traité élémentaire de minéralogie. Deuxiéme Edition [Elementary Treatise on Mineralogy. Second Edition]\u003C\u002Fi> (2nd ed.) Vol. 1 - Tome Premier [Volume One]. Chez Verdière. \u003Ca target='_blank' href='https:\u002F\u002Farchive.org\u002Fdownload\u002Ftraitlmentaired02unkngoog\u002Ftraitlmentaired02unkngoog.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":138,"year":139,"html":140,"doi":11},16124854,1835,"Necker (1835) Sylvanit. [?]",{"id":142,"year":143,"html":144,"doi":145},101253,1878,"Schrauf, A. (1878) XVII. Ueber die Tellurerze Siebenbürgens. \u003Ci>Zeitschrift für Kristallographie - Crystalline Materials\u003C\u002Fi>,  2 (1) 209-252 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1524\u002Fzkri.1878.2.1.209'>doi:10.1524\u002Fzkri.1878.2.1.209\u003C\u002Fa>","10.1524\u002Fzkri.1878.2.1.209",{"id":147,"year":148,"html":149,"doi":11},16124856,1900,"Palache, C. (1900) Notes on the tellurides from Colorado. American Journal of Science: 10: 419-427.",{"id":151,"year":152,"html":153,"doi":154},4668,1903,"Spencer, L. J. (1903) Mineralogical notes on Western Australian Tellurides: the non-existence of ‘Kalgoorlite’ and ‘Coolgardite’ as mineral species. \u003Ci>Mineralogical Magazine and Journal of the Mineralogical Society\u003C\u002Fi>,  13 (61) 268-290 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1903.13.61.07'>doi:10.1180\u002Fminmag.1903.13.61.07\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_13\u002F13-61-268.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1903.13.61.07",{"id":156,"year":157,"html":158,"doi":11},520621,1937,"Short, M. N. (1937) Etch tests on calaverite, krennerite, and sylvanite. \u003Ci>American Mineralogist\u003C\u002Fi>,  22 (5) 667-674 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM22\u002FAM22_667.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":160,"year":157,"html":161,"doi":11},520627,"Tunell, George, Ksanda, C. J. (1937) The space-group and unit cell of sylvanite. \u003Ci>American Mineralogist\u003C\u002Fi>,  22 (5) 728-730 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM22\u002FAM22_728.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":163,"year":164,"html":165,"doi":11},521160,1941,"Tunell, George (1941) The atomic arrangement of sylvanite. \u003Ci>American Mineralogist\u003C\u002Fi>,  26 (8) 457-477 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM26\u002FAM26_457.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":167,"year":168,"html":169,"doi":11},1118651,1944,"Palache, Charles, Berman, Harry, Frondel, Clifford (1944) \u003Ci>The System of Mineralogy\u003C\u002Fi> (7th ed.) Vol. 1 - Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, New York.",{"id":171,"year":172,"html":173,"doi":11},521877,1949,"Thompson, R. M. (1949) The telluride minerals and their occurrence in Canada. \u003Ci>American Mineralogist\u003C\u002Fi>,  34 (5-6) 341-382 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM34\u002FAM34_341.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":175,"year":176,"html":177,"doi":178},463911,1952,"Tunnell, G., Pauling, L. (1952) The atomic arrangement and bonds of the gold–silver ditellurides. \u003Ci>Acta Crystallographica\u003C\u002Fi>,  5 (3) 375-381 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1107\u002Fs0365110x52001106'>doi:10.1107\u002Fs0365110x52001106\u003C\u002Fa>","10.1107\u002Fs0365110x52001106",{"id":180,"year":181,"html":182,"doi":183},231672,1965,"Cabri, Louis J. (1965) Phase relations in the Au-Ag-Te systems and their mineralogical significance. \u003Ci>Economic Geology\u003C\u002Fi>,  60 (8) 1569-1606 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2113\u002Fgsecongeo.60.8.1569'>doi:10.2113\u002Fgsecongeo.60.8.1569\u003C\u002Fa>","10.2113\u002Fgsecongeo.60.8.1569",{"id":185,"year":186,"html":187,"doi":188},12987754,1969,"Kelly, William C., Goddard, Edwin N. (1969) Telluride Ores of Boulder County, Colorado. \u003Ci>GSA Memoir\u003C\u002Fi> 109. Geological Society of America \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1130\u002Fmem109'>doi:10.1130\u002Fmem109\u003C\u002Fa>","10.1130\u002Fmem109",{"id":190,"year":191,"html":192,"doi":193},578480,1983,"Amelinckx, S., Van Tendeloo, G., Gregoriades, P., Amelinckx, S. (1983) Electron microscopic studies of modulated structures in (Au,Ag)Te\u003Csub>2\u003C\u002Fsub>: Part II. Sylvanite AgAuTe\u003Csub>4\u003C\u002Fsub>. \u003Ci>Journal of Solid State Chemistry\u003C\u002Fi>,  50. 335-361 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1016\u002F0022-4596(83)90204-9'>doi:10.1016\u002F0022-4596(83)90204-9\u003C\u002Fa>","10.1016\u002F0022-4596(83)90204-9",{"id":195,"year":196,"html":197,"doi":198},7741824,1984,"Pertlik, F. (1984) Kristallchemie natürlicher Telluride I: Verfeinerung der Kristallstruktur des Sylvanits, AuAgTe\u003Csub>4\u003C\u002Fsub>. \u003Ci>TMPM Tschermaks Mineralogische und Petrographische Mitteilungen\u003C\u002Fi>,  33 (3) 203-212 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fbf01081381'>doi:10.1007\u002Fbf01081381\u003C\u002Fa>","10.1007\u002Fbf01081381",{"id":200,"year":201,"html":202,"doi":11},17094170,1994,"Wagner, F. E., Sawicki, J. A., Friedl, J., Mandarino, J. A., Harris, D. C.,  Cabri, L. J. (1994) 197Au Mössbauer study of the gold–silver ditellurides sylvanite, krennerite and calaverite. \u003Ci>The Canadian Mineralogist\u003C\u002Fi>,  32 (1) 189-201 \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Frruff_1.0\u002Fuploads\u002FCM32_189.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":204,"year":205,"html":206,"doi":11},17094169,1995,"Wagner, F. E., Sawicki, J. A., Friedl, J. (1995) 197Au Mössbauer study of the gold-silver ditellurides sylvanite, krennerite and calaverite: reply. \u003Ci>The Canadian Mineralogist\u003C\u002Fi>,  33 (1) 187-188 \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Frruff_1.0\u002Fuploads\u002FCM33_187.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":208,"year":205,"html":209,"doi":11},17094200,"Stanek, J. (1995) 197Au Mössbauer study of the gold-silver ditellurides sylvanite, krennerite and calaverite: discussion. \u003Ci>The Canadian Mineralogist\u003C\u002Fi>,  33 (1) 185 \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Frruff_1.0\u002Fuploads\u002FCM33_185.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":211,"year":212,"html":213,"doi":11},16967556,2005,"(2005) Sylvanite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fsylvanite.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":215,"year":212,"html":216,"doi":217},30493,"Cook, Robert B. (2005) Connoisseur's Choice: Sylvanite, Vindicator Mine, Cripple Creek, Teller County, Colorado. \u003Ci>Rocks & Minerals\u003C\u002Fi>,  80 (5) 344-348 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3200\u002Frmin.80.5.344-348'>doi:10.3200\u002Frmin.80.5.344-348\u003C\u002Fa>","10.3200\u002Frmin.80.5.344-348",{"id":219,"year":220,"html":221,"doi":222},17094230,2022,"Kitahara, Ginga, Yoshiasa, Akira, Tokuda, Makoto, Nespolo, Massimo, Hongu, Hidetomo, Momma, Koichi, Miyawaki, Ritsuro, Sugiyama, Kazumasa (2022) Crystal structure, XANES and charge distribution investigation of krennerite and sylvanite: analysis of Au—Te and Te—Te bonds in Au\u003Csub>1–x\u003C\u002Fsub>Ag\u003Csub>x\u003C\u002Fsub>Te\u003Csub>2\u003C\u002Fsub> group minerals. \u003Ci>Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials\u003C\u002Fi>,  78 (2) 117-132 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1107\u002FS2052520622000804'>doi:10.1107\u002FS2052520622000804\u003C\u002Fa>","10.1107\u002FS2052520622000804",[224,234,241,250,257,267,276,285,295,301,308,315,321],{"id":225,"source_url":226,"license_code":227,"credit_html":228,"title":229,"description":230,"author":231,"original_width":232,"original_height":233},10178,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=6916925","CC BY-SA 3.0","Didier Descouens, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=6916925\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Sylvanite.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSylvanite\" class=\"extiw\" title=\"en:Sylvanite\">Sylvanite\u003C\u002Fa> \n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality :  Sacarîmb (Sãcãrâmb; Szekerembe; Nagyág), Hunedoara Co., Romania\u003C\u002Fdd>\n\u003Cdd>Size : 4x2.8cm\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Didier Descouens",1449,1036,{"id":235,"source_url":236,"license_code":237,"credit_html":238,"title":7,"description":11,"author":11,"original_width":239,"original_height":240},30781,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F61896","CC BY-SA 4.0","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby-sa\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F61896\" rel=\"noopener\">The Estonian Museum of Natural History\u003C\u002Fa> via Europeana",1000,666,{"id":242,"source_url":243,"license_code":227,"credit_html":244,"title":245,"description":246,"author":247,"original_width":248,"original_height":249},10179,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10175074","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10175074\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Sylvanite-34306.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSylvanite\" class=\"extiw\" title=\"en:Sylvanite\">Sylvanite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Sacarîmb (Sãcãrâmb; Szekerembe; Nagyág), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHunedoara_County\" class=\"extiw\" title=\"en:Hunedoara County\">Hunedoara County\u003C\u002Fa>, Romania (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-2608.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 9.7 x 7 x 4.5 cm.\u003C\u002Fdd>\n\u003Cdd>An extraordinarily rich specimen with bright silver-colored veins of crystalline sylvanite embedded in the matrix, nicely displayed because of the contrast. This is a rich piece at a reasonable price, in my opinion.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Robert M. Lavinsky",600,540,{"id":251,"source_url":252,"license_code":227,"credit_html":253,"title":254,"description":255,"author":247,"original_width":248,"original_height":256},10180,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177483","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177483\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Sylvanite-258224.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSylvanite\" class=\"extiw\" title=\"en:Sylvanite\">Sylvanite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Cripple Creek District, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FTeller_County,_Colorado\" class=\"extiw\" title=\"en:Teller County, Colorado\">Teller County\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FColorado\" class=\"extiw\" title=\"en:Colorado\">Colorado\u003C\u002Fa>, USA (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-3611.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 5.3 x 4.1 x 2.6 cm.\u003C\u002Fdd>\n\u003Cdd>This well-trimmed matrix features a 2-cm-long crystal of sylvanite. Sylvanite is a very rare silver gold telluride. Large crystals are only known from a few locales, of which the most historic are in the now defunct old mining districts of Romania and in Colorado. Seldom do you see such large crystals, in particular from Colorado. This crystal measures 20 mm in size, and is superbly displayed on a well-trimmed matrix. Minor microscopic purple fluorite is in association. This is a major specimen for the species and locale, far more impactful and important than its physical size would indicate otherwise. From an old collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",471,{"id":258,"source_url":259,"license_code":260,"credit_html":261,"title":262,"description":263,"author":264,"original_width":265,"original_height":266},10182,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=34370990","CC BY 2.0","James St. John, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=34370990\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Sylvanite ((Au,Ag)2Te4), Cripple Creek Diatreme.jpg","\u003Cp>Sylvanite ((Au,Ag)2Te4) (silver-colored) from the Cripple Creek Diatreme (Early Oligocene, 32 Ma) of central Colorado, USA (ER # 1956, Ed Raines loan to Colorado School of Mines Geology Museum, Golden, Colorado, USA).\n\u003C\u002Fp>\u003Cp>The Cripple Creek Gold District of central Colorado, USA is famous for its unusual gold and silver mineralization.  Precious metal mineralization occurs in the Cripple Creek Diatreme, the root zone of a deeply eroded volcano dating to the Early Oligocene (32 Ma).\n\u003C\u002Fp>\nThe dominant lithology at Cripple Creek is the scarce igneous rock phonolite, an alkaline, intermediate, extrusive igneous rock.  Cripple Creek gold can be found in its native state (Au), but it typically occurs in the form of gold telluride minerals (for example, sylvanite - (Au,Ag)2Te4, calaverite - AuTe2, petzite - Ag3AuTe2, krennerite - (Au,Ag)Te2, and nagyagite - Pb5Au(Sb,Bi)Te2S6).  Silver also occurs in some Cripple Creek minerals, including sylvanite, petzite, krennerite, hessite - Ag2Te, tennantite - (Cu,Ag,Fe,Zn)12As4S13, acanthite - Ag2S, and tetrahedrite - (Cu,Fe,Ag,Zn)12Sb4S13.","James St. John",1750,1099,{"id":268,"source_url":269,"license_code":260,"credit_html":270,"title":271,"description":272,"author":273,"original_width":274,"original_height":275},10183,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=41697667","jsj1771, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=41697667\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Sylvanite (Transylvania, Romania).jpg","Sylvanite from Transylvania, Romania. (SDSMT 141, South Dakota School of Mines and Technology, Museum of Geology, Rapid City, South Dakota, USA)\n\u003Cp>A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties.  At its simplest, a mineral is a naturally-occurring solid chemical.  Currently, there are over 4900 named and described minerals - about 200 of them are common and about 20 of them are very common.  Mineral classification is based on anion chemistry.  Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.\n\u003C\u002Fp>\u003Cp>The telluride minerals contain one or more telluride anions (Te-2).  The tellurides are usually considered together with the sulfide minerals, the arsenide minerals, and the sulfarsenide minerals.\n\u003C\u002Fp>\u003Cp>Sylvanite is a rare precious metal telluride mineral, (Au,Ag)2Te4 - gold silver telluride.  This mineral volatilizes at relatively low temperatures.  With heating, the tellurium component of sylvanite readily vaporizes, leaving behind blebs of gold\u002Fsilver.\n\u003C\u002Fp>\u003Cp>Sylvanite has a metallic luster, a bright silver color, is fairly soft, and usually occurs in the form of elongated blades or small granular masses.  It is known from only a few scattered localities on Earth and occurs with other telluride minerals such as calaverite (AuTe2 - gold telluride).  Sylvanite is an important gold\u002Fsilver ore mineral in precious metal telluride deposits such as the Golden Quadrilateral in Romania, near Kalgoorlie in western Australia, and the Cripple Creek Diatreme in Colorado, USA.\n\u003C\u002Fp>\n\u003Chr>\n\u003Cp>Photo gallery of sylvanite:\n\u003C\u002Fp>\nwww.mindat.org\u002Fgallery.php?min=3849","jsj1771",1298,1917,{"id":277,"source_url":278,"license_code":237,"credit_html":279,"title":280,"description":281,"author":282,"original_width":283,"original_height":284},10184,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113749589","Koreller, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=113749589\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Muséum de Nantes - 508 - Sylvanite (Roumanie).jpg","Sylvanite, en provenance de Roumanie, au Muséum de Nantes","Koreller",3208,2532,{"id":286,"source_url":287,"license_code":288,"credit_html":289,"title":290,"description":291,"author":292,"original_width":293,"original_height":294},10185,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=143266916","Public domain","Juan González, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=143266916\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Sylvanite-1321041.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSylvanite\" class=\"extiw\" title=\"en:Sylvanite\">Sylvanite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Dimensions: 80 mm × 67 mm × 33 mm\u003C\u002Fdd>\n\u003Cdd>Locality: Cripple Creek Mining District, Teller County, Colorado, USA\u003C\u002Fdd>\n\u003Cdd>Description: Ex-Taylor collection. Ex-collection California Institute of Technology. Specimen composed of elongated, lamellar and very fine crystallizations, with strong metallic luster on matrix. It belonged to the collection of the Institute where it in turn appears to have come from the Taylor collection. The Institute gave it as part payment or exchange for other pieces (apparently native gold) to Mr. Wayne of “Kristalle”, Laguna Beach, California, and from this it passed to Jordi Fabre, Barcelona (personal comment).\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>","Juan González",2702,2508,{"id":296,"source_url":297,"license_code":237,"credit_html":298,"title":299,"description":11,"author":11,"original_width":239,"original_height":300},30782,"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F127938","Photo: Unknown author — http:\u002F\u002Fcreativecommons.org\u002Flicenses\u002Fby-sa\u002F4.0\u002F, courtesy of \u003Ca href=\"https:\u002F\u002Fgeocollections.info\u002Ffile\u002F127938\" rel=\"noopener\">University of Tartu, Natural History Museum\u003C\u002Fa> via Europeana","Calcite",612,{"id":302,"source_url":303,"license_code":227,"credit_html":304,"title":305,"description":306,"author":247,"original_width":248,"original_height":307},69025,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177151","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177151\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Nagyagite-Sylvanite-243077.jpg","\u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FNagy%C3%A1gite\" class=\"extiw\" title=\"en:Nagyágite\">Nagyágite\u003C\u002Fa>, \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSylvanite\" class=\"extiw\" title=\"en:Sylvanite\">Sylvanite\u003C\u002Fa>\n\u003Cdl>\u003Cdd>\u003Cdl>\u003Cdd>Locality: Sacarîmb (Sãcãrâmb; Szekerembe; Nagyág), \u003Ca href=\"https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FHunedoara_County\" class=\"extiw\" title=\"en:Hunedoara County\">Hunedoara County\u003C\u002Fa>, Romania (\u003Ca rel=\"nofollow\" class=\"external text\" href=\"http:\u002F\u002Fwww.mindat.org\u002Floc-2608.html\">Locality at mindat.org\u003C\u002Fa>)\u003C\u002Fdd>\n\u003Cdd>Size: 5.4 x 5.2 x 2.8 cm.\u003C\u002Fdd>\n\u003Cdd>Nagyagite specimens from the famous Type Locality of Nagyag (now called Sacarimb), Romania are quite rare. The splendent, laminar crystals in this one are of considerable size and well defined for the species, up to 2.6 cm. This outstanding, two-sided, combination specimen also has long, dendritic, hair-like crystals of sylvanite to 1.9 cm on one side and matte-black sphalerite crystals on both sides. This excellent and classic, old-time piece probably dates to the 1800s, but no proof. Ex. Eric Asselborn Collection.\u003C\u002Fdd>\u003C\u002Fdl>\u003C\u002Fdd>\u003C\u002Fdl>",525,{"id":309,"source_url":310,"license_code":227,"credit_html":311,"title":312,"description":306,"author":247,"original_width":313,"original_height":314},69026,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177152","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177152\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Nagyagite-Sylvanite-243078.jpg",607,646,{"id":316,"source_url":317,"license_code":227,"credit_html":318,"title":319,"description":306,"author":247,"original_width":320,"original_height":248},69027,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177153","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177153\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Nagyagite-Sylvanite-243079.jpg",599,{"id":322,"source_url":323,"license_code":227,"credit_html":324,"title":325,"description":306,"author":247,"original_width":326,"original_height":327},69028,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177156","Robert M. Lavinsky, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=10177156\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Nagyagite-Sylvanite-243080.jpg",691,605,[329],{"id":330,"url":331,"label":332,"formula":333,"spacegroup":334,"year":164},13337,"\u002Fcif\u002F13337.cif","Tunell 1941","Au Ag Te4","P 1 2\u002Fc 1",[336,337,338,339,340,341,342,343,344,345,346,347,348,349,350,351,352,353,354,355,356],"Auro-argentiferous tellurium","Aurotellurit","Aurotellurita","Aurotellurite","Aurum Bismuthicum","Aurum Graphicum","Goldschmidtit (of Hobbs)","Goldschmidtite (of Hobbs)","Goldtellur","Graphic Tellurium","Or graphique","Schrifterz","Sylvane graphique","Sylvanite (of Necker)","Tellure auro-argentifère","Tellure ferrifère et aurifère","Tellursilberblei","Weißgolderz","Weisstellur","White tellurium","Yellow Tellurium",[358,362,366,370,374,378,383,386,390,394,398,402,406,410,414,417,421,424,428,432,435,439,442,446,450],{"lang":359,"names":360},"ar",[361],"سلفانيت",{"lang":363,"names":364},"ast",[365],"Silvanita",{"lang":367,"names":368},"ca",[369],"silvanita",{"lang":371,"names":372},"de",[347,373],"Sylvanit",{"lang":375,"names":376},"es",[365,377],"Sylvanita",{"lang":379,"names":380},"et",[381,382],"silvaniit","sülvaniit",{"lang":384,"names":385},"eu",[377],{"lang":387,"names":388},"fa",[389],"سیلوانیت",{"lang":391,"names":392},"fi",[393],"Sylvaniitti",{"lang":395,"names":396},"fr",[339,397,346,348,7],"Goldschmidtite",{"lang":399,"names":400},"hu",[401],"szilvanit",{"lang":403,"names":404},"it",[405],"Silvanite",{"lang":407,"names":408},"nb",[409],"sylvanitt",{"lang":411,"names":412},"nl",[413],"Sylvaniet",{"lang":415,"names":416},"nn",[409],{"lang":418,"names":419},"pl",[373,420],"sylwanit",{"lang":422,"names":423},"pt",[369,405],{"lang":425,"names":426},"ro",[427],"Silvanit",{"lang":429,"names":430},"ru",[431],"Сильванит",{"lang":433,"names":434},"sk",[373],{"lang":436,"names":437},"sr",[438],"силванит",{"lang":440,"names":441},"sv",[373],{"lang":443,"names":444},"uk",[445],"Сильваніт",{"lang":447,"names":448},"zh",[449],"针碲金银矿",{"lang":451,"names":452},"zh-hant",[453],"針碲金銀礦","Q414266",{"history":11,"applications":11}]