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 %
NaAluminum 2.07 %
AlSilicon 19.41 %
SiCopper 34.16 %
CuHydrogen 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
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