Mineralpedia Details for Legrandite
Legrandite
Named for a Belgian mine engineer known only as a Mr. Legrand, who was the first to collect the mineral. An uncommon mineral that occurs in oxidized zinc-arsenic bearing deposits, and can be found, albeit rarely, in granite pegmatites. Localities for Legrandite include in Mexico, Namibia, the United States, Japan, and Brazil.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/legrandite.pdf
- Formula
- Zn2AsO4(OH)·H2O
- Crystal System
- Monoclinic
- Crystal Habit
- Crystalline - Fine, Prismatic
- Cleavage
- Imperfect, None, None
- Luster
- Vitreous (Glassy)
- Color
- yellow, yellowish orange
- Streak
- white
- Class
- Monoclinic - Prismatic
- Fracture
- Brittle - Conchoidal
- Hardness
- 4-5
- WebMineral
- View Legrandite
- Mindat
- View Legrandite
Legrandite from Mina Ojuela, Mapimi, Durango, Mexico
Yellow prismatic crystal to 5mm.
This group of acicular crystals 1.5 x 1.5cm.
Golden yellow group of prismatic Legrandite crystals to 1.5cm.
Yellow thin prismatic crystals to 1mm.
Dozens of yellow odd-shaped, blocky to prismatic crystals Legrandite to 5mm.
Rare zinc arsenate with yellow, glassy prismatic crystals the largest of which is 5mm.
Legrandite from Sterling Hill mine, Ogdensburg, Sussex Co., New Jersey, United States
Yellow scaly or platy crystals on surface.
