Bastnasite-(Ce)

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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