Legrandite
Mineral Zn2(AsO4)(OH)·H2O
Take care.
- Contains arsenic: Wash your hands after handling it, don't make dust, and never heat it.
About it
Canary-yellow sprays of prisms prized by collectors, chiefly from the Ojuela mine at Mapimí in Mexico. Rare elsewhere; named for Belgian mine manager Louis Legrand.
- Type
- Mineral
- Group
- Arsenate
- Formula
- Zn2(AsO4)(OH)·H2O
- Hardness (Mohs)
- 4.5
- Specific gravity
- 3.98–4.01
- Streak
- white to pale yellow
- Lustre
- vitreous (glassy)
- Crystal system
- Monoclinic
- Colours
- bright yellow, wax yellow, colourless
- Transparency
- transparent, translucent
- Cleavage and fracture
- poor; uneven fracture
Typical values: real specimens vary. For more, see mindat.org.