General Information:
Chemical Formula:Zn2(AsO4)(OH)
Composition:(Molecular Weight = 286.71 gm)Zinc 45.61 %
ZnArsenic 26.13 %
AsHydrogen 0.35 %
H Oxygen 27.90 %
O Empirical Formula: Zn2(AsO4)(OH)
Locality:TL: Chile, Atacama, Cha¤arcillo
Name Origin:Named after the French mineralogist Gilbert Joseph Adam (1795-1881).
Physical Properties: Cleavage:[101] Good, [010] Poor
Color:yellow, green, violet, pink, or yellowish green.
Density:4.3 - 4.5, Average = 4.4
Diaphaniety:Subtransparent
Habits:Tabular - Form dimensions are thin in one direction., Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces., Encrustations - Forms crust-like aggregate s on matrix.
Hardness:3.5 - Copper Penny
Luminescence:Fluorescent and phosphorescent.
Luster:Vitreous - Resinous
Streak:white
More details...
