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artificial crystals exhibit {210} and {211}.",2.5,3,"3.02","Rose-red",[46,47],"red","pink","Isotropic","In a volcanic cavern.","Named as the manganese analogue of langbeinite.","2025-08-11 12:14:21",[],[54,62,67,73],{"id":55,"name":56,"entrytype":9,"csystem":35,"ima_formula":57,"mindat_formula":58,"hmin":42,"hmax":59,"dmeas":60,"dcalc":61,"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":63,"name":64,"entrytype":9,"csystem":35,"ima_formula":65,"mindat_formula":65,"hmin":13,"hmax":13,"dmeas":38,"dcalc":66,"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":68,"name":69,"entrytype":9,"csystem":35,"ima_formula":70,"mindat_formula":70,"hmin":13,"hmax":13,"dmeas":71,"dcalc":72,"primary_image_id":11},53673,"Ferroefremovite","(NH\u003Csub>4\u003C\u002Fsub>)\u003Csub>2\u003C\u002Fsub>Fe\u003Csup>2+\u003C\u002Fsup>\u003Csub>2\u003C\u002Fsub>(SO\u003Csub>4\u003C\u002Fsub>)\u003Csub>3\u003C\u002Fsub>","2.69","2.700",{"id":74,"name":75,"entrytype":9,"csystem":35,"ima_formula":76,"mindat_formula":76,"hmin":59,"hmax":77,"dmeas":78,"dcalc":79,"primary_image_id":80},2320,"Langbeinite","K\u003Csub>2\u003C\u002Fsub>Mg\u003Csub>2\u003C\u002Fsub>(SO\u003Csub>4\u003C\u002Fsub>)\u003Csub>3\u003C\u002Fsub>",4,"2.83","2.77",30059,[],[],[84],{"id":85,"txt":86,"latitude":11,"longitude":11,"country":87},145740,"Mount Vesuvius, Metropolitan City of Naples, Campania, Italy","Italy",[89,93,97,101,105],{"id":90,"year":91,"html":92,"doi":11},16115854,1924,"Zambonini and Carobbi (1924) Reale accademia delle scienze fisische e matematiche, Naples, Rendus: (3): 30: 123.",{"id":94,"year":95,"html":96,"doi":11},16115855,1926,"American Mineralogist (1926): 11: 107.",{"id":98,"year":99,"html":100,"doi":11},16115856,1947,"Bellanca (1947) Reale accademia nazionale dei Lincei, Rome, Att., Cl. sc. (8): 2: 451.",{"id":102,"year":103,"html":104,"doi":11},1118652,1951,"Palache, Charles; Berman, Harry; Frondel, Clifford (1951) \u003Ci>The System of Mineralogy\u003C\u002Fi> (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons.",{"id":106,"year":107,"html":108,"doi":11},16965813,2007,"(2007) Manganolangbeinite. \u003Ci>Handbook of Mineralogy\u003C\u002Fi>. Mineralogical Society of America \u003Ca target='_blank' href='https:\u002F\u002Fwww.handbookofmineralogy.org\u002Fpdfs\u002Fmanganolangbeinite.pdf' class='refpdflink'>\u003C\u002Fa>",[110],{"id":111,"source_url":112,"license_code":113,"credit_html":114,"title":115,"description":116,"author":117,"original_width":118,"original_height":119},15332,"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=103011371","CC BY-SA 4.0","David Hospital, via \u003Ca href=\"https:\u002F\u002Fcommons.wikimedia.org\u002F?curid=103011371\" rel=\"noopener\">Wikimedia Commons\u003C\u002Fa>","Manganolangbeinite.jpg","Outstanding rose red specimen of the extremely rare K-Mn sulphate mineral manganolangbeinite from the type and only known locality worldwide in Mount Vesuvius (Campania, Italy). Ex Vandenbroucke Museum collection from Waregem, Belgium.","David Hospital",771,588,[121,128],{"id":122,"url":123,"label":124,"formula":125,"spacegroup":126,"year":127},8426,"\u002Fcif\u002F8426.cif","Oelkrug 1988 · K2 Mn2 S3 O12 (1)","K2 Mn2 S3 O12","P 21 3",1988,{"id":129,"url":130,"label":131,"formula":125,"spacegroup":132,"year":127},8427,"\u002Fcif\u002F8427.cif","Oelkrug 1988 · K2 Mn2 S3 O12 (2)","P 21 21 21",[134],"Manganolangbeiniet",[136,140,144,148],{"lang":137,"names":138},"ca",[139],"manganolangbeinita",{"lang":141,"names":142},"de",[143],"Manganolangbeinit",{"lang":145,"names":146},"eu",[147],"Manganolangbeinita",{"lang":149,"names":150},"it",[7],"Q3844534",{"history":11,"applications":11}]