General Information:
Chemical Formula:Zn2(AsO4)(OH)·(H2O)
Composition:(Molecular Weight = 304.72 gm)Zinc 42.92 %
ZnArsenic 24.59 %
AsHydrogen 0.99 %
H Oxygen 31.50 %
O Empirical Formula: Zn2(AsO4)(OH)·(H2O)
Environment:Secondary mineral in zinc orebodies.
Locality:Ojuela mine near Mapimi, Durango.
Name Origin:Named after the Belgian mining engineer, Legrande.
Physical Properties: Cleavage:[100] Imperfect
Color:yellow or yellowish orange.
Density:4
Diaphaniety:Translucent
Habits:Crystalline - Fine - Occurs as well-formed fine sized crystals., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).,
Hardness:4-5 - Fluorite-Apatite
Luster:Vitreous (Glassy)
Streak:white
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