Formula: Ca3Si2O7
Origin of name: Locality; Kilchoan, Scotland
Crystal system: Orthorhombic
Crystal class: mm2
Twinning:
Unit cell:
Colour: Colourless
Diaphaneity:
Luster:
Habit: Massive
Hardness:
Specific gravity: 2.99
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments: Dimorphous with rankinite
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