Mineralpedia Details for Voltaite
Voltaite
- Formula
- K2Fe2+5Fe3+3Al(SO4)12ยท18H2O
- Crystal System
- Isometric
- Crystal Habit
- Massive - Granular, Crystalline - Fine
- Cleavage
- None, None, None
- Luster
- Silky
- Color
- greenish black, dark green, olive green, black
- Streak
- grayish green
- Class
- Isometric - Hexoctahedral
- Fracture
- Uneven
- Hardness
- 3-3.5
- WebMineral
- View Voltaite
- Mindat
- View Voltaite
Voltaite from Alcaparrosa mine, Cerritos Bayos, Calama, El Loa, Antofagasta, Chile
Glossy black octahedrons to 1mm in a matrix of purple Coquimbite and other sulfates.
Click thumbnail images for larger view.
