General Information:
Chemical Formula:
K(La,Ce,Th)2(Ca,Na)4(Si,Al)16O40
IMA Status:
Approved IMA 1976
Physical Properties:
Cleavage:
[???] Good, [???] Good
Color:
greenish yellow.
Density:
3.27
Diaphaniety:
Transparent to Translucent
Hardness:
4.5 - Between Fluorite and Apatite
Luster:
Earthy (Dull)
Streak:
white
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