General Information:
Chemical Formula:
BiCu6(AsO4)3(OH)6·3(H2O)
Composition:
(Molecular Weight = 1,163.10 gm)
Copper 32.78 % Cu
Bismuth 17.97 % Bi
Arsenic 19.32 % As
Hydrogen 1.04 % H
Oxygen 28.89 % O
Empirical Formula:
BiCu6(AsO4)3(OH)6·3(H2O)
Name Origin:
Named after the mining engineer, A. Mixa from Jachymov, Czechoslovakia.
Physical Properties:
Color:
blue green, yellow green, white, light blue, or light green.
Density:
3.8
Habits:
Acicular - Occurs as needle-like crystals., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Encrustations - Forms crust-like aggregates on mat rix.
Hardness:
3.5-4 - Copper Penny-Flourite
Luminescence:
None.
Luster:
Adamantine
Streak:
pale green
More details...