Formula: Na4Ca6(Mn,Fe,Mg)19Li2Al8(PO4)24(F,OH)8
Origin of name: From Greek for puzzle
Crystal system: Cubic
Crystal class: 2/m -3
Twinning:
Unit cell:
Colour: Dark brown to brownish black
Diaphaneity: Translucent
Luster: Resinous to vitreous
Habit: Massive, compact
Hardness: 5.5
Specific gravity: 3.64
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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