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Chemically related to sabieite and pyracmonite.","Named for being the Fe analogue of efremovite.","2025-08-11 12:15:21",[],[67,75,80,87],{"id":68,"name":69,"entrytype":9,"csystem":32,"ima_formula":70,"mindat_formula":71,"hmin":58,"hmax":72,"dmeas":73,"dcalc":74,"primary_image_id":11},42383,"Calciolangbeinite","K\u003Csub>2\u003C\u002Fsub>Ca\u003Csub>2\u003C\u002Fsub>(SO\u003Csub>4\u003C\u002Fsub>)\u003Csub>3\u003C\u002Fsub>","K\u003Csub>2\u003C\u002Fsub>Ca\u003Csub>2\u003C\u002Fsub>(SO\u003Csub>4\u003C\u002Fsub>)\u003Csub>3\u003C\u002Fsub> ",3.5,"2.68","2.74",{"id":76,"name":77,"entrytype":9,"csystem":32,"ima_formula":78,"mindat_formula":78,"hmin":42,"hmax":42,"dmeas":35,"dcalc":79,"primary_image_id":11},1355,"Efremovite","(NH\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>Mg\u003Csub>2\u003C\u002Fsub>(SO\u003Csub>4\u003C\u002Fsub>)\u003Csub>3\u003C\u002Fsub>","2.52",{"id":81,"name":82,"entrytype":9,"csystem":32,"ima_formula":83,"mindat_formula":83,"hmin":72,"hmax":39,"dmeas":84,"dcalc":85,"primary_image_id":86},2320,"Langbeinite","K\u003Csub>2\u003C\u002Fsub>Mg\u003Csub>2\u003C\u002Fsub>(SO\u003Csub>4\u003C\u002Fsub>)\u003Csub>3\u003C\u002Fsub>","2.83","2.77",30059,{"id":88,"name":89,"entrytype":9,"csystem":32,"ima_formula":90,"mindat_formula":91,"hmin":92,"hmax":58,"dmeas":93,"dcalc":35,"primary_image_id":94},2485,"Manganolangbeinite","K\u003Csub>2\u003C\u002Fsub>Mn\u003Csup>2+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>(SO\u003Csub>4\u003C\u002Fsub>)\u003Csub>3\u003C\u002Fsub>","K\u003Csub>2\u003C\u002Fsub>Mn\u003Csub>2\u003C\u002Fsub>(SO\u003Csub>4\u003C\u002Fsub>)\u003Csub>3\u003C\u002Fsub>",2.5,"3.02",15332,[],[],[98],{"id":99,"txt":100,"latitude":101,"longitude":102,"country":103},271003,"\"Bocca Grande\" fumarole, Solfatara di Pozzuoli, Pozzuoli, Metropolitan City of Naples, Campania, Italy",40.8280556,14.1416667,"Italy",[105,109],{"id":106,"year":26,"html":107,"doi":108},16082842,"Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2019) CNMNC Newsletter No 50, New minerals and nomenclature modifications approved in 2019. \u003Ci>Mineralogical Magazine\u003C\u002Fi>,  83 (4) 615-620 \u003Ca target='_blank' href='https:\u002F\u002Fdoi.org\u002F10.1180\u002Fmgm.2019.46'>doi:10.1180\u002Fmgm.2019.46\u003C\u002Fa>","10.1180\u002Fmgm.2019.46",{"id":110,"year":27,"html":111,"doi":11},16082828,"Kasatkin A.V., Plášil J., Škoda R., Campostrini I., Chukanov N.V., Agakhanov A.A., Karpenko V.Y. and Belakovskiy D.I. (2021) Ferroefremovite, (NH4)2Fe2+2(SO4)3, a new mineral from Solfatara di Pozzuoli, Campania, Italy. The Canadian Mineralogist: 59(1): 59–68.",[],[],[115,116],"Ferroefremoviet","IMA2019-008",[118,122,127],{"lang":119,"names":120},"ca",[121],"ferroefremovita",{"lang":123,"names":124},"de",[125,126],"Ferroefremovit","IMA 2019-008",{"lang":128,"names":129},"pt",[7,116],"Q68694328",{"history":11,"applications":11}]