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Also a 7.502, c 7.554","Fine-grained granular crust.","White, powdery effluorescence",1,2,"2.04","1.99","Also calculated = 1.80","Waxy,Dull,Earthy","Due to fine-grained material","Translucent","White","White, pale yellow or colorless; colorless in transmitted light.",[58,59,60],"white","yellow","colorless",[58],"None Observed","Irregular\u002FUneven","brittle","Uniaxial","-","1.525","1.48",1.48,1.525,"Non-pleochroic","0.045","parallel","Guano deposits","Guano caves","Western Australian Museum, Perth, MDC3977.","The related, monohydrogen compound, occurs as phosphammite.","Named in 1870 by Charles Upham Shepard for the chemical composition containing phosphate and ammonium.","2025-08-11 12:14:18",[],[],[83,91,97],{"id":84,"name":85,"entrytype":9,"csystem":86,"ima_formula":87,"mindat_formula":87,"hmin":47,"hmax":47,"dmeas":88,"dcalc":89,"primary_image_id":90},3197,"Phosphammite","Monoclinic","(NH\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>(PO\u003Csub>3\u003C\u002Fsub>OH)","1.62","1.61",19325,{"id":92,"name":93,"entrytype":9,"csystem":36,"ima_formula":94,"mindat_formula":94,"hmin":11,"hmax":11,"dmeas":95,"dcalc":41,"primary_image_id":96},4117,"Urea","CO(NH\u003Csub>2\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>","1.33",30900,{"id":98,"name":99,"entrytype":9,"csystem":36,"ima_formula":100,"mindat_formula":101,"hmin":43,"hmax":43,"dmeas":102,"dcalc":103,"primary_image_id":104},4254,"Weddellite","Ca(C\u003Csub>2\u003C\u002Fsub>O\u003Csub>4\u003C\u002Fsub>) &middot; 2H\u003Csub>2\u003C\u002Fsub>O","Ca(C\u003Csub>2\u003C\u002Fsub>O\u003Csub>4\u003C\u002Fsub>)&middot;(2.5-x)H\u003Csub>2\u003C\u002Fsub>O","1.94","1.962",27893,[106],{"id":107,"name":108,"entrytype":9,"csystem":36,"ima_formula":109,"mindat_formula":110,"hmin":47,"hmax":48,"dmeas":41,"dcalc":111,"primary_image_id":112},315,"Archerite","H\u003Csub>2\u003C\u002Fsub>K(PO\u003Csub>4\u003C\u002Fsub>)","(K,NH\u003Csub>4\u003C\u002Fsub>)(H\u003Csub>2\u003C\u002Fsub>PO\u003Csub>4\u003C\u002Fsub>)","2.23",1752,[114],{"id":115,"txt":116,"latitude":117,"longitude":118,"country":119},230,"Murra-El-Elevyn Cave, Cocklebiddy Roadhouse, Dundas Shire, Western Australia, Australia",-32.0433266,126.0385897,"Australia",13,[122,125,130,134,138,142],{"id":123,"year":27,"html":124,"doi":11},15937212,"Shepard, C.U. (1870) Notice of the Guanape Island guano. The Rural Carolinian: 1: 469-471.",{"id":126,"year":127,"html":128,"doi":129},6614,1972,"Pryce, M. W. (1972) Biphosphammite: a second occurrence. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  38 (300) 965-967 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fminmag.1972.038.300.08'>doi:10.1180\u002Fminmag.1972.038.300.08\u003C\u002Fa> \u003Ca target='_blank' href='https:\u002F\u002Frruff.info\u002Fdoclib\u002FMinMag\u002FVolume_38\u002F38-300-965.pdf' class='refpdflink'>\u003C\u002Fa>","10.1180\u002Fminmag.1972.038.300.08",{"id":131,"year":132,"html":133,"doi":11},526119,1973,"Fleischer, M. (1973) New mineral names. \u003Ci>American Mineralogist\u003C\u002Fi>,  58 (7-8). 805-807 \u003Ca target='_blank' href='http:\u002F\u002Fwww.minsocam.org\u002Fammin\u002FAM58\u002FAM58_805.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":135,"year":132,"html":136,"doi":137},214313,"Khan, A. A., Baur, W. H. (1973) Refinement of the crystal structures of ammonium dihydrogen phosphate and ammonium dihydrogen arsenate. \u003Ci>Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry\u003C\u002Fi>,  29 (12) 2721-2726 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1107\u002Fs0567740873007442'>doi:10.1107\u002Fs0567740873007442\u003C\u002Fa>","10.1107\u002Fs0567740873007442",{"id":139,"year":140,"html":141,"doi":11},16963249,2005,"(2005) Biphosphammite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fbiphosphammite.pdf' class='refpdflink'>\u003C\u002Fa>",{"id":143,"year":144,"html":145,"doi":146},16558421,2011,"Frost, Ray L., Xi, Yunfei, Palmer, Sara J. (2011) Are the ‘cave’ minerals archerite (K,NH4)H2PO4 and biphosphammite (K,NH4)H2PO4 identical? A molecular structural study. \u003Ci>Journal of Molecular Structure\u003C\u002Fi>,  1001 (1) 49-55 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1016\u002Fj.molstruc.2011.06.015'>doi:10.1016\u002Fj.molstruc.2011.06.015\u003C\u002Fa>","10.1016\u002Fj.molstruc.2011.06.015",[148,156],{"id":112,"source_url":149,"license_code":150,"credit_html":151,"title":152,"description":153,"author":154,"original_width":155,"original_height":155},"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=76112466","CC BY-SA 4.0","David Hospital, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=76112466\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Biphosphammite & Archerite.jpg","Buff to tan colored almost brown biphosphammite crystals associated to white archerite from the type locality in Australia: Murra-el-elevyn Cave, Dundas Shire, Western Australia, Australia.","David Hospital",544,{"id":157,"source_url":158,"license_code":150,"credit_html":159,"title":160,"description":153,"author":154,"original_width":161,"original_height":162},1753,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=76112467","David Hospital, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=76112467\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Archerite & Biphosphammite.jpg",696,667,[164],{"id":165,"url":166,"label":167,"formula":168,"spacegroup":169,"year":132},1567,"\u002Fcif\u002F1567.cif","Khan 1973","P N O4 H6","I -4 2 d",[171,172],"Biphosphammiet","Biphosphammita",[174,178,182,186],{"lang":175,"names":176},"ca",[177],"bifosfamita",{"lang":179,"names":180},"de",[181],"Biphosphammit",{"lang":183,"names":184},"eu",[185],"Bifosfammita",{"lang":187,"names":188},"it",[189,7],"Bifosfammite","Q3640278",{"history":11,"applications":11}]