General Information:
Chemical Formula:
Cu6Fe+++Bi+++O4(SO4)5·KCl
Composition:
(Molecular Weight = 1,264.97 gm)
Potassium 3.09 % K
Iron 4.41 % Fe
Copper 30.14 % Cu
Bismuth 16.52 % Bi
Sulfur 12.67 % S
Chlorine 2.80 % Cl
Oxygen 30.36 % O
Empirical Formula:
Cu6Fe3+BiO4(SO4)5(KCl)
IMA Status:
Approved IMA 1985
Physical Properties:
Cleavage:
[???] Perfect
Color:
dark brown.
Density:
4.2
Diaphaniety:
Transparent
Hardness:
2-2.5 - Gypsum-Finger Nail
Luster:
Vitreous (Glassy)
Streak:
light brown
More details...