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Legrandite

#55448

Legrandite

#55448
Availability
Sold
Size
6 x 5 x 3 cm - Sm Cabinet 
Formula
Zn2AsO4(OH)·H2O (RRUFF)
Locality
Mina Ojuela, Mapimi, Durango, Mexico
Tagged
arsenate

The void in this specimen is 2 x 1.5cm and has three long prismatic crystals to around 1cm each. The void daylights on the flip side and the crystals on that side are lighter and more transluent. There are numerous other micro crystals in other spots on the matrix. Associated are glassy light yellow Adamite and little rice shaped crystals of Hydrozincite.

Legrandite

Formula
Zn2AsO4(OH)·H2
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 

Data courtesy of Webmineral.

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