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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