Strengite
Mineral FePO4·2H2O
About it
Pink to violet crusts and small spheres formed as iron phosphates weather in pegmatites and iron ore deposits; the iron partner of variscite. Best known from the pegmatites of Bavaria.
- Type
- Mineral
- Group
- Phosphate, variscite group
- Formula
- FePO4·2H2O
- Hardness (Mohs)
- 3.5–4
- Specific gravity
- 2.84–2.87
- Streak
- white
- Lustre
- vitreous (glassy)
- Crystal system
- Orthorhombic
- Colours
- pink, violet, purple, red, colourless
- Transparency
- transparent, translucent
- Cleavage and fracture
- good in one direction
Typical values: real specimens vary. For more, see mindat.org.