Species / Silicates / #0227
Anorthite
Silicates triclinic #0227
Anorthite is a mineral species described as calcium-rich feldspar mineral. It is classified under the Nickel-Strunz scheme and its reference data is listed below.
| Formula | CaAl₂Si₂O₈ |
| Strunz code | 9.FA.35 |
| Class | Silicates |
| Crystal system | triclinic |
| Type locality | Mount Somma |
| Named after | a- |
| Streak | — |
Composition
O
46.01%
Si
20.19%
Al
19.4%
Ca
14.41%
Molar mass 278.204 g/mol
Physical
Mohs
Density
g/cm³