General Information:
Chemical Formula:
Cu2Al7(AsO4)4(OH)13·12(H2O)
Composition:
(Molecular Weight = 1,308.92 gm)
Aluminum 14.43 % Al
Copper 9.71 % Cu
Arsenic 22.90 % As
Hydrogen 2.85 % H
Oxygen 50.12 % O
Empirical Formula:
Cu2Al7AsO44(OH)13·12(H2O)
Physical Properties:
Color:
blue or deep blue.
Density:
2.7
Hardness:
5-6 - Between Apatite and Orthoclase
Streak:
bluish white
More details...