Mineralpedia Details for Bobfergusonite
Bobfergusonite
- Formula
- Na2Mn2+5Fe3+Al(PO4)6
- Crystal System
- Monoclinic
- Cleavage
- Perfect, None, None
- Luster
- Resinous
- Color
- greenish brown, reddish brown
- Streak
- yellowish brown
- Class
- Monoclinic - Prismatic
- Fracture
- Brittle
- Hardness
- 4
- WebMineral
- View Bobfergusonite
- Mindat
- View Bobfergusonite
Bobfergusonite from Nancy pegmatite, Chacabuco dept., San Luis, Argentina
This is the second world locality for this primary phosphate mineral found in a pegmatite. It is a simple Na-Mn iron phosphate with two distinct cleavages and one known parting. The parting surfaces can be seen as flashes of reflections when the sample is tilted back and forth and are yellowish or bronzy color. It is a granular mineral, dark green, much like alluaudite.
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