General Information:
Chemical Formula:
K3Cu3Fe+++O2(SO4)4
Composition:
(Molecular Weight = 780.03 gm)
Potassium 15.04 % K
Iron 7.16 % Fe
Copper 24.44 % Cu
Sulfur 16.44 % S
Oxygen 36.92 % O
Empirical Formula:
K3Cu3Fe3+O2(SO4)4
Environment:
Deposited by fumaroles.
IMA Status:
Approved IMA
Locality:
Great Tolbachik fissure eruption, Kamchatka, Russia.
Name Origin:
Named after the locality.
Physical Properties:
Cleavage:
[???] Perfect
Color:
green, gray green, or olive green.
Density:
3 - 3.15, Average = 3.07
Diaphaniety:
Transparent
Habits:
Aggregates - Made of numerous individual crystals or clusters., Acicular - Occurs as needle-like crystals.,
Hardness:
3.5 - Copper Penny
Luster:
Sub Metallic
Streak:
greenish
More details...