Alpeite

Alpeite is a calcium manganese magnesium silicate mineral with the chemical formula Ca4Mn3+2Al2(Mn3+Mg)(SiO4)2(Si3O10)(V5+O4)(OH)6. It is named for its type locality, the Monte Alpe mine in Italy.[1]

Alpeite crystals

References
  1. Alpeite Archived 2019-04-06 at the Wayback Machine on mindat.org
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