Formula
(repeating unit) Mn5(SiO4)2(OH)2 Dana classification 52.3.2b.1 | Strunz classification 9.AF.45 Crystal system Monoclinic | |
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Category Nesosilicates
Humite group Crystal class Prismatic (2/m)
(same H-M symbol) | ||
Alleghanyite is a moderately rare humite mineral with formula Mn5(SiO4)2(OH)2, belonging to the nesosilicates class. In general its occurrences are related with metamorphic (metamorphosed) manganese deposits. The mineral is named after Alleghany County, North Carolina, US.
References
Alleghanyite Wikipedia(Text) CC BY-SA