Phosphosiderite
Mineral FePO4·2H2O
About it
Lavender to purple crusts and crystals, the monoclinic twin of strengite with the same formula. Found in weathered pegmatites with other iron phosphates.
- Type
- Mineral
- Group
- Phosphate, metavariscite group
- Formula
- FePO4·2H2O
- Hardness (Mohs)
- 3.5–4
- Specific gravity
- 2.74–2.78
- Streak
- pale pink to white
- Lustre
- vitreous (glassy)
- Crystal system
- Monoclinic
- Colours
- pink, purple, violet, red, colourless
- Transparency
- transparent, translucent
- Cleavage and fracture
- good in one direction
Typical values: real specimens vary. For more, see mindat.org.