Formula: K2Ca(CO3)2
Origin of name: For J. Fairchild, American geochemist
Crystal system: Hexagonal
Crystal class: 6/m 2/m 2/m
Twinning:
Unit cell:
Colour: Colourless
Diaphaneity:
Luster:
Habit: Hexagonal plates, microscopic
Hardness:
Specific gravity: 2.45
Cleavage: 1; {0001} good
Tenacity:
Streak:
Synonyms/varieties:
Comments: Dimorphous with butschliite
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