Mineralpedia Details for Alluaudite
Alluaudite
- Formula
- (Na,Ca)2(Mn,Mg,Fe2+)(Fe3+,Mn2+)2(PO4)3
- Crystal System
- Monoclinic
- Crystal Habit
- Platy, Fibrous, Nodular
- Cleavage
- Good, Good, None
- Color
- brownish yellow, green, yellow, black
- Streak
- brownish yellow
- Class
- Monoclinic - Prismatic
- Hardness
- 5-5.5
- WebMineral
- View Alluaudite
- Mindat
- View Alluaudite
Alluaudite from Pleasant Valley mine, Custer Co., South Dakota, United States
- Special Info
- XRD Confirmed
Dark green crystalline or granular and noduler Alluaudite, a primary phosphate. Confirmed by XRD.
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