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Point Group: 2\u002Fm 2\u002Fm 2\u002Fm or n.d.;Space Group: Ibam  or n.d.","Small grains intergrown with a copper arsenide",3.5,"136","157",25,"8.48","8.437","Metallic","Opaque","Black","Bluish-white",[48,49,50],"white","blue","black",[50],"Bluish gray","None","Anisotropic","Strong","(45.9,46.4) 440,\r\n(43.0,41.4) 480,\r\n(40.0,37.6) 520,\r\n(38.0,34.5) 560,\r\n(37.2,32.2) 600,\r\n(37.6,30.7) 640,\r\n(38.5,29.9) 680,\r\n(39.2,29.8) 700","Etched by HNO3, HCl (20%), FeCl3","1) Charles University, Prague, Czech Republic, 18269.\r\n2) National Museum of Natural History, Washington, D.C., USA, 162605.","Named in 1958 by Zdenek Johan in honor of Jaromir Koutek (1 April 1902, Trebic, Czech Republic - 5 February 1983, Prague, Czech Republic), professor of economic geology, Charles University, Prague.","2026-01-25 21:37:28",[],[],[64,73,81,91,100,108,116,122,129,138,145],{"id":65,"name":66,"entrytype":9,"csystem":31,"ima_formula":67,"mindat_formula":68,"hmin":69,"hmax":69,"dmeas":70,"dcalc":71,"primary_image_id":72},114,"Algodonite","Cu\u003Csub>1-x\u003C\u002Fsub>As\u003Csub>x\u003C\u002Fsub> (x ≈ 0.15)","(Cu\u003Csub>1-x\u003C\u002Fsub>As\u003Csub>x\u003C\u002Fsub>)",4,"8.38","8.72",651,{"id":74,"name":75,"entrytype":9,"csystem":31,"ima_formula":76,"mindat_formula":77,"hmin":37,"hmax":37,"dmeas":78,"dcalc":79,"primary_image_id":80},128,"Allargentum","Ag\u003Csub>1-x\u003C\u002Fsub>Sb\u003Csub>x\u003C\u002Fsub> (x ≈ 0.09-0.16)","(Ag\u003Csub>1-x\u003C\u002Fsub>Sb\u003Csub>x\u003C\u002Fsub>)","10.0","10.12",766,{"id":82,"name":83,"entrytype":9,"csystem":84,"ima_formula":85,"mindat_formula":86,"hmin":87,"hmax":87,"dmeas":88,"dcalc":89,"primary_image_id":90},859,"Calcite","Trigonal","Ca(CO\u003Csub>3\u003C\u002Fsub>)","CaCO\u003Csub>3\u003C\u002Fsub>",3,"2.7102","2.711",4401,{"id":92,"name":93,"entrytype":9,"csystem":94,"ima_formula":95,"mindat_formula":95,"hmin":96,"hmax":87,"dmeas":97,"dcalc":98,"primary_image_id":99},962,"Chalcocite","Monoclinic","Cu\u003Csub>2\u003C\u002Fsub>S",2.5,"5.5","5.8",5161,{"id":101,"name":102,"entrytype":9,"csystem":103,"ima_formula":104,"mindat_formula":104,"hmin":87,"hmax":37,"dmeas":105,"dcalc":106,"primary_image_id":107},1306,"Domeykite","Isometric","Cu\u003Csub>3\u003C\u002Fsub>As","7.2","7.86",7328,{"id":109,"name":110,"entrytype":9,"csystem":103,"ima_formula":111,"mindat_formula":112,"hmin":113,"hmax":113,"dmeas":70,"dcalc":114,"primary_image_id":115},2298,"Kutinaite","Ag\u003Csub>6\u003C\u002Fsub>Cu\u003Csub>14\u003C\u002Fsub>As\u003Csub>7\u003C\u002Fsub>","Ag\u003Csub>6\u003C\u002Fsub>Cu\u003Csub>14\u003C\u002Fsub>As\u003Csub>7\u003C\u002Fsub> ",4.5,"8.400",13795,{"id":117,"name":118,"entrytype":9,"csystem":84,"ima_formula":16,"mindat_formula":16,"hmin":37,"hmax":37,"dmeas":119,"dcalc":120,"primary_image_id":121},357,"Native Arsenic","5.63","5.778",17090,{"id":123,"name":124,"entrytype":9,"csystem":103,"ima_formula":125,"mindat_formula":125,"hmin":96,"hmax":87,"dmeas":126,"dcalc":127,"primary_image_id":128},3664,"Native Silver","Ag","10.1","10.497",17318,{"id":130,"name":131,"entrytype":9,"csystem":31,"ima_formula":132,"mindat_formula":132,"hmin":133,"hmax":134,"dmeas":135,"dcalc":136,"primary_image_id":137},2901,"Nickeline","NiAs",5,5.5,"7.784","7.834",17641,{"id":139,"name":140,"entrytype":9,"csystem":94,"ima_formula":141,"mindat_formula":141,"hmin":37,"hmax":37,"dmeas":142,"dcalc":143,"primary_image_id":144},3137,"Paxite","CuAs\u003Csub>2\u003C\u002Fsub>","5.4","5.97",13609,{"id":146,"name":147,"entrytype":9,"csystem":103,"ima_formula":148,"mindat_formula":148,"hmin":134,"hmax":149,"dmeas":150,"dcalc":151,"primary_image_id":152},3682,"Skutterudite","CoAs\u003Csub>3\u003C\u002Fsub>",6,"6.5","6.821",22475,[],[155],{"id":156,"txt":157,"latitude":158,"longitude":159,"country":160},776,"Černý Důl, Trutnov District, Hradec Králové Region, Czech Republic",50.6166667,15.7,"Czech Republic",21,[163,166,170,174,178,183,188,192,197,202,206,210],{"id":164,"year":25,"html":165,"doi":11},523097,"Fleischer, M. (1958) New Mineral Names. \u003Ci>American Mineralogist\u003C\u002Fi>,  43 (7-8). 790-798 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM43\u002FAM43_790.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":167,"year":25,"html":168,"doi":169},2411838,"JOHAN, ZDENĚK (1958) Koutekite: a new mineral. \u003Ci>Nature\u003C\u002Fi>,  181 (4622). 1553-1554 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1038\u002F1811553a0'>doi:10.1038\u002F1811553a0\u003C\u002Fa>","10.1038\u002F1811553a0",{"id":171,"year":172,"html":173,"doi":11},16114214,1960,"Johan, Z. (1960) Koutekit - Cu2As, ein neues Mineral. Chemie der Erde: 20: 217-226.",{"id":175,"year":176,"html":177,"doi":11},523528,1961,"Fleischer, Michael (1961) New mineral names. \u003Ci>American Mineralogist\u003C\u002Fi>,  46 (3-4). 464-468 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM46\u002FAM46_464.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":179,"year":180,"html":181,"doi":182},401646,1967,"Picot, Paul; Vernet, Jean (1967) Un nouveau gisement de koutekite : le dôme du Barrot (Alpes-Maritimes). \u003Ci>Bulletin de la Société française de Minéralogie et de Cristallographie\u003C\u002Fi>,  90 (1). 82-89 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.3406\u002Fbulmi.1967.6070'>doi:10.3406\u002Fbulmi.1967.6070\u003C\u002Fa>","10.3406\u002Fbulmi.1967.6070",{"id":184,"year":185,"html":186,"doi":187},2735234,1971,"Liebisch, W., Schubert, K. (1971) Zur Struktur der Mischung Kupfer-Arsen. \u003Ci>Journal of the Less Common Metals\u003C\u002Fi>,  23 (2). 231-236 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1016\u002F0022-5088(71)90086-5'>doi:10.1016\u002F0022-5088(71)90086-5\u003C\u002Fa>","10.1016\u002F0022-5088(71)90086-5",{"id":189,"year":190,"html":191,"doi":11},16114216,1979,"Makovicky, M.; Rose-Hansen, J.; Skinner, B. J. (1979): Phases and phase relations in the system Cu–Ag–As at 500, 400 and 350°C. Neues Jahrbuch für Mineralogie, Abh.: 135: 221-269.",{"id":193,"year":194,"html":195,"doi":196},7741790,1983,"Tarkian, M., Bock, W. D., Neumann, M. (1983) Geology and mineralogy of the Cu-Ni-Co-U ore deposits at Talmessi and Meeskani, central Iran. \u003Ci>TMPM Tschermaks Mineralogische und Petrographische Mitteilungen\u003C\u002Fi>,  32 (2). 111-133 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fbf01081105'>doi:10.1007\u002Fbf01081105\u003C\u002Fa>","10.1007\u002Fbf01081105",{"id":198,"year":199,"html":200,"doi":201},7741850,1985,"Johan, Z. (1985) The Černý Důl deposit (Czechoslovakia): An example of Ni-, Fe-, Ag-, Cu-arsenide mineralization with extremely high activity of arsenic; new data on paxite, novakite and kutinaite. \u003Ci>TMPM Tschermaks Mineralogische und Petrographische Mitteilungen\u003C\u002Fi>,  34 (3) 167-182 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1007\u002Fbf01082960'>doi:10.1007\u002Fbf01082960\u003C\u002Fa>","10.1007\u002Fbf01082960",{"id":203,"year":204,"html":205,"doi":11},16519802,1986,"Burke, E. A. J. (1986) Koutekite and some other opaque minerals new for Långban, Sweden. \u003Ci>Neues Jahrbuch für Mineralogie, Monatshefte\u003C\u002Fi>, 59-64",{"id":207,"year":208,"html":209,"doi":11},529484,1993,"Jambor, L., Burke, Ernst A. J., Grew, Edward S., Puziewicz, Jacek (1993) New Mineral Names. \u003Ci>American Mineralogist\u003C\u002Fi>,  78 (5-6) 672-678 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM78\u002FAM78_672.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":211,"year":212,"html":213,"doi":11},16965384,2005,"(2005) Koutekite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fkoutekite.pdf' class='refpdflink'>\u003C\u002Fa>",[215],{"id":216,"source_url":217,"license_code":218,"credit_html":219,"title":220,"description":221,"author":222,"original_width":223,"original_height":224},13608,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=181855810","CC BY 4.0","David Hospital, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=181855810\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Koutekite.jpg","Bluish grey crystal aggregates of the very rare Cu arsenide mineral koutekite. From: Mohawk Mine, Mohawk, Keweenaw County, Michigan, United States of America. Ex Vandenbroucke Museum collection from Waregem, Belgium.","David Hospital",800,534,[226],{"id":227,"url":228,"label":229,"formula":230,"spacegroup":231,"year":185},7274,"\u002Fcif\u002F7274.cif","Liebisch 1971","Cu5 As2","I b a m",[233],"Koutekiet",[235,239,243,247,250],{"lang":236,"names":237},"ca",[238],"koutekita",{"lang":240,"names":241},"de",[242],"Koutekit",{"lang":244,"names":245},"eu",[246],"Koutekita",{"lang":248,"names":249},"fr",[7],{"lang":251,"names":252},"it",[7],"Q3816684",{"history":11,"applications":11}]