Hureaulite
Mineral Mn2+5(PO3OH)2(PO4)2·4H2O
About it
Pink to orange-pink crystals formed as manganese phosphates alter in granite pegmatites. Named for Les Hureaux in France; fine crystals come from Brazil and the Black Hills.
- Type
- Mineral
- Group
- Phosphate
- Formula
- Mn2+5(PO3OH)2(PO4)2·4H2O
- Hardness (Mohs)
- 5
- Specific gravity
- 3.15–3.19
- Streak
- white
- Lustre
- vitreous (glassy), greasy
- Crystal system
- Monoclinic
- Colours
- pink, orange, violet, reddish brown, colourless
- Transparency
- transparent, translucent
- Cleavage and fracture
- good in one direction
Typical values: real specimens vary. For more, see mindat.org.