Formula: CaBi(CO3)OF
Origin of name: For R. Kettner, Czech geologist
Crystal system: Tetragonal
Crystal class: 4/m 2/m 2/m
Twinning:
Unit cell:
Colour: Brown, brownish yellow to lemon-yellow
Diaphaneity:
Luster:
Habit: Tiny plates
Hardness:
Specific gravity: 5.80
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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