General Information:
Chemical Formula:
Cu3(SO4)(OH)4
Composition:
(Molecular Weight = 354.73 gm)
Copper 53.74 % Cu
Hydrogen 1.14 % H
Sulfur 9.04 % S
Oxygen 36.08 % O
Empirical Formula:
Cu3(SO4)(OH)4
Environment:
Secondary, weathered zone of carbonate-poor copper deposits.
IMA Status:
Accepted IMA 1961
Locality:
Antler mine, Mojave Co., Arizona.
Name Origin:
Named after its locality.
Physical Properties:
Cleavage:
[010] Perfect
Color:
green, light green, emerald green, black, or black green.
Density:
3.9
Diaphaniety:
Translucent
Habits:
Acicular - Occurs as needle-like crystals., Concretionary - Rounded massive fine-grained materials., Reniform - "Kidney like" in shape (e.g.. hematite).
Hardness:
3 - Calcite
Luminescence:
None.
Luster:
Vitreous (Glassy)
Streak:
pale green
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