General Information:
Chemical Formula:
K3Cu3AlO2(SO4)4
Composition:
(Molecular Weight = 751.17 gm)
Potassium 15.62 % K
Aluminum 3.59 % Al
Copper 25.38 % Cu
Sulfur 17.08 % S
Oxygen 38.34 % O
Empirical Formula:
K3Cu3AlO2(SO4)4
Environment:
A volcanic exhalation.
IMA Status:
Approved IMA 1995
Locality:
The second cone of the Northern Breakthrough of the Main Tolbachik fracture eruption, Kamchatka, Russia.
Name Origin:
It is the aluminum dominant analog of klyuchevskite.
Physical Properties:
Cleavage:
[001] Perfect
Color:
dark green.
Density:
3.1
Diaphaniety:
Transparent
Habits:
Acicular - Occurs as needle-like crystals., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).,
Hardness:
2 - Gypsum
Luster:
Vitreous (Glassy)
Streak:
light green
More details...