General Information:
Chemical Formula:
(K,Na)Cu7AlSi9O24(OH)6·3(H2O)
Composition:
(Molecular Weight = 1,302.14 gm)
Potassium 2.70 % K
Sodium 0.18 % Na
Aluminum 2.07 % Al
Silicon 19.41 % Si
Copper 34.16 % Cu
Hydrogen 0.93 % H
Oxygen 40.55 % O
Empirical Formula:
K0.9Na0.1Cu7AlSi9O24(OH)6·3(H2O)
Environment:
Secondary copper mineral.
Locality:
New Cornelia mine, Ajo, Pima County,, Arizona, USA.
Name Origin:
Named for the locality.
Physical Properties:
Cleavage:
[010] Perfect
Color:
blue green.
Density:
2.96
Diaphaniety:
Translucent
Habits:
Massive - Uniformly indistinguishable crystals forming large masses., Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape., Platy - Sheet forms (e.g. micas).
Luster:
Vitreous (Glassy)
Streak:
greenish white
More details...