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Haycock gave a brief description of the mineral, in an unpublished report, as a graduate student at Princeton in 1931.","2025-08-11 12:14:20",[],[71,79,86],{"id":72,"name":73,"entrytype":9,"csystem":74,"ima_formula":75,"mindat_formula":75,"hmin":76,"hmax":76,"dmeas":77,"dcalc":78,"primary_image_id":11},2772,"Mooihoekite","Tetragonal","Cu\u003Csub>9\u003C\u002Fsub>Fe\u003Csub>9\u003C\u002Fsub>S\u003Csub>16\u003C\u002Fsub>",4,"4.36","4.37",{"id":80,"name":81,"entrytype":9,"csystem":82,"ima_formula":83,"mindat_formula":83,"hmin":48,"hmax":48,"dmeas":37,"dcalc":84,"primary_image_id":85},3312,"Putoranite","Isometric","Cu\u003Csub>1.1\u003C\u002Fsub>Fe\u003Csub>1.2\u003C\u002Fsub>S\u003Csub>2\u003C\u002Fsub>","6.14",20209,{"id":87,"name":88,"entrytype":9,"csystem":82,"ima_formula":89,"mindat_formula":90,"hmin":48,"hmax":48,"dmeas":91,"dcalc":92,"primary_image_id":85},3877,"Talnakhite","Cu\u003Csub>9\u003C\u002Fsub>Fe\u003Csub>8\u003C\u002Fsub>S\u003Csub>16\u003C\u002Fsub>","Cu\u003Csub>9\u003C\u002Fsub>(Fe,Ni)\u003Csub>8\u003C\u002Fsub>S\u003Csub>16\u003C\u002Fsub>","4.29","4.32",[94,102,111,112,120,128],{"id":95,"name":96,"entrytype":9,"csystem":35,"ima_formula":97,"mindat_formula":97,"hmin":98,"hmax":98,"dmeas":99,"dcalc":100,"primary_image_id":101},1168,"Cubanite","CuFe\u003Csub>2\u003C\u002Fsub>S\u003Csub>3\u003C\u002Fsub>",3.5,"4.03","4.076",6546,{"id":103,"name":104,"entrytype":9,"csystem":82,"ima_formula":105,"mindat_formula":105,"hmin":106,"hmax":107,"dmeas":108,"dcalc":109,"primary_image_id":110},2538,"Magnetite","Fe\u003Csup>2+\u003C\u002Fsup>Fe\u003Csup>3+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>O\u003Csub>4\u003C\u002Fsub>",5.5,6.5,"5.175","5.2",65576,{"id":72,"name":73,"entrytype":9,"csystem":74,"ima_formula":75,"mindat_formula":75,"hmin":76,"hmax":76,"dmeas":77,"dcalc":78,"primary_image_id":11},{"id":113,"name":114,"entrytype":9,"csystem":82,"ima_formula":17,"mindat_formula":17,"hmin":115,"hmax":116,"dmeas":117,"dcalc":118,"primary_image_id":119},1209,"Native Copper",2.5,3,"8.94","8.93",17148,{"id":121,"name":122,"entrytype":9,"csystem":82,"ima_formula":123,"mindat_formula":124,"hmin":98,"hmax":76,"dmeas":125,"dcalc":126,"primary_image_id":127},3155,"Pentlandite","(Ni,Fe)\u003Csub>9\u003C\u002Fsub>S\u003Csub>8\u003C\u002Fsub>","(Ni\u003Csub>x\u003C\u002Fsub>Fe\u003Csub>y\u003C\u002Fsub>)\u003Csub>Σ9\u003C\u002Fsub>S\u003Csub>8\u003C\u002Fsub>","4.6","4.956",30426,{"id":129,"name":130,"entrytype":9,"csystem":131,"ima_formula":132,"mindat_formula":132,"hmin":98,"hmax":48,"dmeas":133,"dcalc":134,"primary_image_id":135},4029,"Troilite","Hexagonal","FeS","4.67","4.85",24586,[],[138],{"id":139,"txt":140,"latitude":141,"longitude":142,"country":143},15012,"Mooihoek Farm 255 KT, Fetakgomo Tubatse Local Municipality, Sekhukhune District Municipality, Limpopo, South Africa",-24.5579289,30.1439744,"South Africa",16,[146,149,153,158,163,167,171],{"id":147,"year":27,"html":148,"doi":11},525855,"Cabri, Louis J., Hall, Sydney R. (1972) Mooihoekite and haycockite, two new copper-iron sulfides, and their relationship to chalcopyrite and talnakhite. \u003Ci>American Mineralogist\u003C\u002Fi>,  57 (5-6) 689-708 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM57\u002FAM57_689.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":150,"year":151,"html":152,"doi":11},16178471,1973,"Rowland, J.F., Hall, S.R. (1973) The crystal structure of haycockite, Cu4Fe5S8. American Mineralogist: 58, 1110 abst.",{"id":154,"year":155,"html":156,"doi":157},210756,1975,"Rowland, J. F., Hall, S. R. (1975) Haycockite, Cu4Fe5S8: a superstructure in the chalcopyrite series. \u003Ci>Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry\u003C\u002Fi>,  31 (8) 2105-2112 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1107\u002Fs0567740875006929'>doi:10.1107\u002Fs0567740875006929\u003C\u002Fa>","10.1107\u002Fs0567740875006929",{"id":159,"year":160,"html":161,"doi":162},393331,1995,"Vaughan, D. J., England, K. E. R., Kelsall, G. H., Yin, Q. (1995) Electrochemical oxidation of chalcopyrite (CuFeS\u003Csub>2\u003C\u002Fsub>) and the related metal-enriched derivatives Cu\u003Csub>4\u003C\u002Fsub>Fe\u003Csub>5\u003C\u002Fsub>S\u003Csub>8\u003C\u002Fsub>, Cu\u003Csub>9\u003C\u002Fsub>Fe\u003Csub>9\u003C\u002Fsub>S\u003Csub>16\u003C\u002Fsub>, and Cu\u003Csub>9\u003C\u002Fsub>Fe\u003Csub>8\u003C\u002Fsub>S\u003Csub>16\u003C\u002Fsub>. \u003Ci>American Mineralogist\u003C\u002Fi>,  80 (7-8). 725-731 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.2138\u002Fam-1995-7-809'>doi:10.2138\u002Fam-1995-7-809\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002Fam\u002Fvol80\u002FAM80_725.pdf' class='refpdflink'>\u003C\u002Fa>","10.2138\u002Fam-1995-7-809",{"id":164,"year":165,"html":166,"doi":11},16886450,1997,"Daltry, V. D. C. (1997) Mineralogy of South Africa: Type-Mineral Species and Type-Mineral Names. \u003Ci>Handbook\u003C\u002Fi> 15. Geological Survey of South Africa",{"id":168,"year":169,"html":170,"doi":11},16964763,2005,"(2005) Haycockite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fhaycockite.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":172,"year":173,"html":174,"doi":11},16111556,2012,"Korzun, B.V., et al. (2012) Preparation, structural and Mossbauer investigations of haycockite, Cu4Fe5S8. Poster P09-P09, 18th International Conference on Ternary and Multinary Compounds, 27 -31 August 2012, Salzburg. [http:\u002F\u002Fwww.conventus.de\u002Ffileadmin\u002Fmedia\u002F2012\u002Fictmc\u002FPosters.pdf]",[],[177],{"id":178,"url":179,"label":180,"formula":181,"spacegroup":182,"year":155},5939,"\u002Fcif\u002F5939.cif","Rowland 1975","Cu4 Fe5 S8","P 2 2 2",[184,185],"Haycockiet","IMA1971-028",[187,191,195,198],{"lang":188,"names":189},"ca",[190],"Haycockita",{"lang":192,"names":193},"de",[194],"Haycockit",{"lang":196,"names":197},"eu",[190],{"lang":199,"names":200},"it",[7],"Q1591831",{"history":11,"applications":11}]