Tarbuttite
Mineral Zn2(PO4)(OH)
About it
Glassy triclinic crystals and sheaf-like groups in oxidized zinc ore, known mainly from Kabwe in Zambia, where it grows with hopeite and parahopeite.
- Type
- Mineral
- Group
- Phosphate
- Formula
- Zn2(PO4)(OH)
- Hardness (Mohs)
- 3.5–4
- Specific gravity
- 4.12–4.15
- Streak
- white
- Lustre
- vitreous (glassy), pearly
- Crystal system
- Triclinic
- Colours
- colourless, pale yellow, pale green, brown, pink
- Transparency
- transparent, translucent
- Cleavage and fracture
- perfect in one direction
Typical values: real specimens vary. For more, see mindat.org.