General Information:
Chemical Formula:
Ce(CO3)F
Composition:
(Molecular Weight = 219.12 gm)
Cerium 63.94 % Ce
Carbon 5.48 % C
Oxygen 21.90 % O
Fluorine 8.67 % F
Empirical Formula:
Ce(CO3)F
Environment:
Contact or alteration zones in alkalic rocks.
IMA Status:
Approved IMA 1987
Locality:
Bastnas Mine, Riddarhyttan district, Vastermanland, Sweden.
Name Origin:
Named after its locality.
Physical Properties:
Cleavage:
[1011] Imperfect, [0001] Indistinct
Color:
yellow or reddish brown.
Density:
4.95 - 5, Average = 4.97
Diaphaniety:
Transparent to Translucent
Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Massive - Granular - Common texture observed in granite and other igneous rock.,
Hardness:
4-5 - Fluorite-Apatite
Luminescence:
None.
Luster:
Vitreous - Greasy
Streak:
white
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