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Greifensteinite

Beryllium phosphate mineral From Wikipedia, the free encyclopedia

Greifensteinite
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Greifensteinite is beryllium phosphate mineral with formula: Ca2Fe2+5Be4(PO4)6(OH)4·6H2O. It is the Fe2+ dominant member of the roscherite group.[5] It crystallizes in the monoclinic crystal system and typically forms prismatic dark olive green crystals.[2]

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It was first described in Germany at Greifenstein Rocks, Ehrenfriedersdorf, and was named for the location. At the type locality, it occurs within a lithium-rich pegmatite in miarolitic cavities. It was approved by the International Mineralogical Association in 2002.[2]

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