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","2025-08-11 12:14:21",[],[],[93,103,111,120,129,137],{"id":94,"name":95,"entrytype":9,"csystem":96,"ima_formula":97,"mindat_formula":98,"hmin":99,"hmax":99,"dmeas":100,"dcalc":101,"primary_image_id":102},1443,"Fairfieldite","Triclinic","Ca\u003Csub>2\u003C\u002Fsub>Mn\u003Csup>2+\u003C\u002Fsup>(PO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub> · 2H\u003Csub>2\u003C\u002Fsub>O","Ca\u003Csub>2\u003C\u002Fsub>Mn\u003Csup>2+\u003C\u002Fsup>(PO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>·2H\u003Csub>2\u003C\u002Fsub>O",3.5,"3.08","3.095",8254,{"id":104,"name":105,"entrytype":9,"csystem":106,"ima_formula":107,"mindat_formula":107,"hmin":72,"hmax":72,"dmeas":108,"dcalc":109,"primary_image_id":110},1572,"Fluorapatite","Hexagonal","Ca\u003Csub>5\u003C\u002Fsub>(PO\u003Csub>4\u003C\u002Fsub>)\u003Csub>3\u003C\u002Fsub>F","3.1","3.18",29724,{"id":112,"name":113,"entrytype":9,"csystem":41,"ima_formula":114,"mindat_formula":115,"hmin":72,"hmax":116,"dmeas":117,"dcalc":118,"primary_image_id":119},1719,"Goethite","FeO(OH)","Fe\u003Csup>3+\u003C\u002Fsup>O(OH)",5.5,"4.27","4.18",29787,{"id":121,"name":122,"entrytype":9,"csystem":123,"ima_formula":124,"mindat_formula":125,"hmin":72,"hmax":72,"dmeas":126,"dcalc":127,"primary_image_id":128},1952,"Hureaulite","Monoclinic","Mn\u003Csup>2+\u003C\u002Fsup>\u003Csub>5\u003C\u002Fsub>(PO\u003Csub>3\u003C\u002Fsub>OH)\u003Csub>2\u003C\u002Fsub>(PO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub> · 4H\u003Csub>2\u003C\u002Fsub>O","Mn\u003Csup>2+\u003C\u002Fsup>\u003Csub>5\u003C\u002Fsub>(PO\u003Csub>3\u003C\u002Fsub>OH)\u003Csub>2\u003C\u002Fsub>(PO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>·4H\u003Csub>2\u003C\u002Fsub>O","3.15","3.23",29898,{"id":130,"name":131,"entrytype":9,"csystem":123,"ima_formula":132,"mindat_formula":133,"hmin":99,"hmax":99,"dmeas":134,"dcalc":135,"primary_image_id":136},2452,"Ludlamite","Fe\u003Csup>2+\u003C\u002Fsup>\u003Csub>3\u003C\u002Fsub>(PO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub> · 4H\u003Csub>2\u003C\u002Fsub>O","Fe\u003Csup>2+\u003C\u002Fsup>\u003Csub>3\u003C\u002Fsub>(PO\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>·4H\u003Csub>2\u003C\u002Fsub>O","3.12","3.176",14836,{"id":138,"name":139,"entrytype":9,"csystem":140,"ima_formula":141,"mindat_formula":141,"hmin":142,"hmax":142,"dmeas":143,"dcalc":144,"primary_image_id":145},3337,"Quartz","Trigonal","SiO\u003Csub>2\u003C\u002Fsub>",7,"2.65","2.66",30579,[],[148],{"id":149,"txt":150,"latitude":11,"longitude":11,"country":151},20062,"Champion Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA","USA",[153,156,160],{"id":154,"year":31,"html":155,"doi":11},17064925,"Dunn, P. J., Peacor, D. R., Sturman, D. B., Ramik, R. A., Roberts, W. L., Nelen, J. A. (1986) Johnwalkite, the manganese analog of olmsteadite, from South Dakota. \u003Ci>Neues Jahrbuch für Mineralogie - Monatshefte\u003C\u002Fi>,  1986. 115-120",{"id":157,"year":158,"html":159,"doi":11},15965429,1987,"Hawthorne, F.C., Bladh, K.W., Burke, E.A.J, Grew, E.S., Langley, R.H., Puciewicz, J., Roberts, A.C., Schedler, R.A., Shigley, J.E., Vanko, D.A. (1987) New mineral names. American Mineralogist: 72: 222-230.",{"id":161,"year":162,"html":163,"doi":11},16965143,2007,"(2007) Johnwalkite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fjohnwalkite.pdf' class='refpdflink'>\u003C\u002Fa>",[165],{"id":166,"source_url":167,"license_code":168,"credit_html":169,"title":170,"description":171,"author":172,"original_width":173,"original_height":174},12679,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=110992398","CC BY-SA 4.0","David Hospital, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=110992398\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Johnwalkite.jpg","Brown single crystal aggregate of the extremely rare K-Mn-Nb phosphate mineral johnwalkite from the type and only known locality worldwide in South Dakota (Champion Mine, Keystone, Pennington County, South Dakota, United States of America). Ex Vandenbroucke Museum collection from Waregem, Belgium.","David Hospital",677,480,[],[177,178],"IMA1985-008","Johnwalkiet",[180,184,189,193,196],{"lang":181,"names":182},"ca",[183],"johnwalkita",{"lang":185,"names":186},"de",[187,188],"IMA 1985-008","Johnwalkit",{"lang":190,"names":191},"eu",[192],"Johnwalkita",{"lang":194,"names":195},"it",[7],{"lang":197,"names":198},"zh",[199],"磷铌锰钾石","Q3809765",{"history":11,"applications":11}]