Mineralpedia Details for Ishikawaite
Ishikawaite
- Formula
- (U,Fe,Y)NbO4
- Crystal System
- Orthorhombic
- Crystal Habit
- Metamict
- Cleavage
- None, None, None
- Luster
- Resinous
- Color
- black
- Streak
- dark brown
- Class
- Orthorhombic
- Fracture
- Brittle - Conchoidal
- Hardness
- 5-6
- WebMineral
- View Ishikawaite
- Mindat
- View Ishikawaite
Ishikawaite from Swamp No. 1 quarry, Topsham, Sagadahoc Co., Maine, United States
Grey prismatic crystals from 2-5mm in orange-rusty red Monazite. Excellent specimen. This is a niobium-yttrium-fluorine type of pegmatite.
Click thumbnail images for larger view.
