Alpeite
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| Alpeite | |
|---|---|
 Alpeite crystals | |
| General | |
| Category | Minerals |
| Formula | Ca4Mn3+2Al2(Mn3+Mg)(SiO4)2(Si3O10)(V5+O4)(OH)6 |
| IMA symbol | Apt |
| Identification | |
| Color | Brownish red |
| Tenacity | Brittle |
| Mohs scale hardness | 5.5-6 |
| Luster | Vitreous, Silky |
| Streak | Beige |
| Diaphaneity | Transparent |
| Specific gravity | 3.374 |
Alpeite (IMA symbol: Apt[1]) 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.[2]
