General Information:
Chemical Formula:
Ni3(AsO4)2·8(H2O)
Composition:
(Molecular Weight = 598.03 gm)
Nickel 29.44 % Ni
Arsenic 25.06 % As
Hydrogen 2.70 % H
Oxygen 42.81 % O
Empirical Formula:
Ni3(AsO4)2·8(H2O)
Locality:
Annaberg, Germany.
Name Origin:
Named after its locality.
Physical Properties:
Cleavage:
[010] Perfect
Color:
apple green, greenish white, gray, yellow green, or white.
Density:
3 - 3.1, Average = 3.05
Diaphaniety:
Transparent to Subtransparent to translucent
Habits:
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite)., Encrustations - Forms crust-like aggregates on matrix., Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
2 - Gypsum
Luminescence:
None.
Luster:
Pearly
Streak:
light green
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