General Information:
Chemical Formula:
Ca4Si2O6(CO3)(OH,F)2
Composition:
(Molecular Weight = 408.49 gm)
Calcium 39.24 % Ca
Silicon 13.75 % Si
Hydrogen 0.25 % H
Carbon 2.94 % C
Oxygen 39.17 % O
Fluorine 4.65 % F
Empirical Formula:
Ca4Si2O6(CO3)(OH)F
Environment:
Alteration product of spurrite in spurrite-gehlenite skarns.
IMA Status:
Approved IMA 1977
Locality:
Bicchu, Fuka, Okayama Prefecture, Japan.
Name Origin:
Named for the locality.
Physical Properties:
Color:
white or light brown.
Density:
2.77
Diaphaniety:
Translucent
Habits:
Crystalline - Fine - Occurs as well-formed fine sized crystals., ,
Hardness:
4 - Fluorite
Luster:
Vitreous (Glassy)
Streak:
white
More details...