Formula: Ca2Al2SiO6(OH)2
Origin of name: From locality; Kamaishi mine, Japan
Crystal system: Tetragonal
Crystal class: unknown
Twinning:
Unit cell:
Colour: Colourless
Diaphaneity: Transparent
Luster:
Habit: Microscopic grains
Hardness:
Specific gravity: 2.83
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments: Dimorphous with bicchulite
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