Austinite
Mineral CaZn(AsO4)(OH)
Take care.
- Contains arsenic: Wash your hands after handling it, don't make dust, and never heat it.
About it
Small colourless to pale yellow-green needles and crusts, the zinc partner of conichalcite. First found at Gold Hill in Utah; also from Mapimí in Mexico.
- Type
- Mineral
- Group
- Arsenate, adelite-descloizite group
- Formula
- CaZn(AsO4)(OH)
- Hardness (Mohs)
- 4–4.5
- Specific gravity
- 4.1–4.2
- Streak
- white
- Lustre
- vitreous (glassy), silky
- Crystal system
- Orthorhombic
- Colours
- colourless, white, yellow, yellowish green
- Transparency
- transparent, translucent
- Cleavage and fracture
- good in one direction
Typical values: real specimens vary. For more, see mindat.org.