General Information:
Chemical Formula:
CuBi2O4
Composition:
(Molecular Weight = 545.50 gm)
Copper 11.65 % Cu
Bismuth 76.62 % Bi
Oxygen 11.73 % O
Empirical Formula:
CuBi2O4
Environment:
On calcite crystals in a calcite vein which occurs along the boundary between gehlenite-surrite skarn and crystalline limestone.
IMA Status:
Approved IMA
Locality:
Fika, Bitchu-Cho, Okayama Prefecture, Japan.
Name Origin:
For Dr. Isao Kusachi (1942- ), of Okayama University in recognition of his work on the skarn minerals of the locality.
Physical Properties:
Cleavage:
[110] Perfect
Color:
black.
Density:
8.5
Diaphaniety:
Opaque
Habits:
Crystalline - Fine - Occurs as well-formed fine sized crystals., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Globular - Spherical, or nearly so, rounded forms (e.g. wavellite).
Hardness:
4-5 - Fluorite-Apatite
Luster:
Metallic
Streak:
black
More details...