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It exibits one form, \u003Cmi>{01_1}\u003C\u002Fmi>.","Lamellar bundles of plates.",1.5,"2.92","2.922","Waxy","Transparent,Translucent","White","Colorless to white",[58,59],"colorless","white",[59],"none under LW or SWUV","At least one, on \u003Cmi>{01_1}\u003C\u002Fmi>","Perfect","Irregular\u002FUneven","brittle","Biaxial","+","1.601","1.607","1.619","71.0","72",1.601,1.619,"r \u003C v, weak","Non-pleochroic","Optical orientation: X ∧ c = 45°, Y ∧ b = 35°, Z ∧ a = 27°","A secondary phase on \"\u003Cm>mohawkite\u003C\u002Fm>\" and calcite. ","A.E. Seaman Mineral Museum, Houghton, Michigan, USA, DM 31075.\r\nNatural History Museum of Los Angeles County, Los Angeles, California, USA, catalogue number 66799.","Tabular crystals, intergrown with guérinite. New structure type, slowly dehydrates via topotactic transition from guérinite, forming a structure partially related to ferrarisite.","The name jeankempite honours Jean Petermann Kemp Zimmer (1917-2001), curator of the A. E. Seaman Mineral Museum from 1975-1986.","2025-08-11 12:15:21",[],[],[86,96,106,115,123,131,139,147,154],{"id":87,"name":88,"entrytype":9,"csystem":89,"ima_formula":90,"mindat_formula":91,"hmin":92,"hmax":92,"dmeas":93,"dcalc":94,"primary_image_id":95},114,"Algodonite","Hexagonal","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":97,"name":98,"entrytype":9,"csystem":99,"ima_formula":100,"mindat_formula":101,"hmin":50,"hmax":102,"dmeas":103,"dcalc":104,"primary_image_id":105},240,"Annabergite","Monoclinic","Ni\u003Csub>3\u003C\u002Fsub>(AsO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub> · 8H\u003Csub>2\u003C\u002Fsub>O","Ni\u003Csub>3\u003C\u002Fsub>(AsO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>·8H\u003Csub>2\u003C\u002Fsub>O",2.5,"3.07","3.146",1478,{"id":107,"name":108,"entrytype":9,"csystem":109,"ima_formula":110,"mindat_formula":111,"hmin":47,"hmax":47,"dmeas":112,"dcalc":113,"primary_image_id":114},859,"Calcite","Trigonal","Ca(CO\u003Csub>3\u003C\u002Fsub>)","CaCO\u003Csub>3\u003C\u002Fsub>","2.7102","2.711",4401,{"id":116,"name":117,"entrytype":9,"csystem":109,"ima_formula":118,"mindat_formula":118,"hmin":119,"hmax":92,"dmeas":120,"dcalc":121,"primary_image_id":122},1304,"Dolomite","CaMg(CO\u003Csub>3\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>",3.5,"2.84","2.876",5744,{"id":124,"name":125,"entrytype":9,"csystem":126,"ima_formula":127,"mindat_formula":127,"hmin":47,"hmax":119,"dmeas":128,"dcalc":129,"primary_image_id":130},1306,"Domeykite","Isometric","Cu\u003Csub>3\u003C\u002Fsub>As","7.2","7.86",7328,{"id":132,"name":133,"entrytype":9,"csystem":99,"ima_formula":134,"mindat_formula":135,"hmin":50,"hmax":50,"dmeas":136,"dcalc":137,"primary_image_id":138},1767,"Guérinite","Ca\u003Csub>5\u003C\u002Fsub>(AsO\u003Csub>3\u003C\u002Fsub>OH)\u003Csub>2\u003C\u002Fsub>(AsO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub> · 9H\u003Csub>2\u003C\u002Fsub>O","Ca\u003Csub>6\u003C\u002Fsub>(HAsO\u003Csub>4\u003C\u002Fsub>)\u003Csub>3\u003C\u002Fsub>(AsO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>·10.5H\u003Csub>2\u003C\u002Fsub>O","2.68","2.74",10560,{"id":140,"name":141,"entrytype":9,"csystem":99,"ima_formula":142,"mindat_formula":143,"hmin":102,"hmax":102,"dmeas":144,"dcalc":145,"primary_image_id":146},2349,"Lavendulan","NaCaCu\u003Csub>5\u003C\u002Fsub>(AsO\u003Csub>4\u003C\u002Fsub>)\u003Csub>4\u003C\u002Fsub>Cl · 5H\u003Csub>2\u003C\u002Fsub>O","NaCaCu\u003Csub>5\u003C\u002Fsub>(AsO\u003Csub>4\u003C\u002Fsub>)\u003Csub>4\u003C\u002Fsub>Cl·5H\u003Csub>2\u003C\u002Fsub>O","3.54","3.597",14103,{"id":148,"name":149,"entrytype":9,"csystem":126,"ima_formula":150,"mindat_formula":150,"hmin":102,"hmax":47,"dmeas":151,"dcalc":152,"primary_image_id":153},1209,"Native Copper","Cu","8.94","8.93",17148,{"id":155,"name":156,"entrytype":9,"csystem":33,"ima_formula":157,"mindat_formula":158,"hmin":34,"hmax":34,"dmeas":159,"dcalc":160,"primary_image_id":161},3371,"Rauenthalite","Ca\u003Csub>3\u003C\u002Fsub>(AsO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub> · 10H\u003Csub>2\u003C\u002Fsub>O","Ca\u003Csub>3\u003C\u002Fsub>(AsO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>·10H\u003Csub>2\u003C\u002Fsub>O","2.36","2.362",20617,[],[164],{"id":165,"txt":166,"latitude":167,"longitude":168,"country":169},3851,"Mohawk Mine, Mohawk, Allouez Township, Keweenaw County, Michigan, USA",47.3080559,-88.3555527,"USA",1,[172,176,180],{"id":173,"year":26,"html":174,"doi":175},16018789,"Hålenius, Ulf, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2018) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) NEWSLETTER 46. \u003Ci>European Journal of Mineralogy\u003C\u002Fi>,  30 (6) 1181-1189 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1127\u002Fejm\u002F2018\u002F0030-2819'>doi:10.1127\u002Fejm\u002F2018\u002F0030-2819\u003C\u002Fa>","10.1127\u002Fejm\u002F2018\u002F0030-2819",{"id":177,"year":27,"html":178,"doi":179},4564542,"Olds, Travis A., Kampf, Anthony R., Dal Bo, Fabrice, Burns, Peter C., Guo, Xiaofeng, McCloy, John S. (2020) Jeankempite, Ca\u003Csub>5\u003C\u002Fsub>(AsO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>(AsO\u003Csub>3\u003C\u002Fsub>OH)\u003Csub>2\u003C\u002Fsub>(H\u003Csub>2\u003C\u002Fsub>O)\u003Csub>7\u003C\u002Fsub>, a new arsenate mineral from the Mohawk Mine, Keweenaw County, Michigan, USA. \u003Ci>Mineralogical Magazine\u003C\u002Fi>, 84 (6) 959-969 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fmgm.2020.92'>doi:10.1180\u002Fmgm.2020.92\u003C\u002Fa>","10.1180\u002Fmgm.2020.92",{"id":181,"year":182,"html":183,"doi":11},16965107,2022,"(2022) Jeankempite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fhandbookofmineralogy.org\u002Fpdfs\u002FJeankempite.pdf' class='refpdflink'>\u003C\u002Fa>",[],[],[187,188],"IMA2018-090","Jeankempiet",[190,194,199],{"lang":191,"names":192},"ca",[193],"jeankempita",{"lang":195,"names":196},"de",[197,198],"IMA 2018-090","Jeankempit",{"lang":200,"names":201},"eu",[202],"Jeankempita","Q58824576",{"history":11,"applications":11}]