General Information:
Chemical Formula:
CuAl6(PO4)4(OH)8·4(H2O)
Composition:
(Molecular Weight = 813.44 gm)
Aluminum 19.90 % Al
Copper 7.81 % Cu
Phosphorus 15.23 % P
Hydrogen 1.98 % H
Oxygen 55.07 % O
Empirical Formula:
CuAl6(PO4)4(OH)8·4(H2O)
Name Origin:
Named after Turkey (from where it was brought to Europe).
Physical Properties:
Cleavage:
[001] Perfect, [010] Good
Color:
blue, blue green, green, green gray, or light blue.
Density:
2.6 - 2.8, Average = 2.7
Diaphaniety:
Subtranslucent to opaque
Habits:
Concretionary - Rounded massive fine-grained materials., Massive - Uniformly indistinguishable crystals forming large masses., Encrustations - Forms crust-like aggregates on matrix.
Hardness:
5-6 - Between Apatite and Orthoclase
Luminescence:
Non-fluorescent.
Luster:
Waxy
Streak:
pale bluish white
More details...