Formula: Ca(Mg,Al)3(Al3Si)O10(OH)
Origin of name: For DeWitt Clinton, American statesman
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Colourless, yellowish, greenish, reddish brown, copper-red
Diaphaneity: Transparent to translucent
Luster: Vitreous, pearly
Habit: Crystals tabular, pseudohexagonal; massive, foliated, lamellar radiate
Hardness: 3.5
Specific gravity: 3 to 3.1
Cleavage: 1; {001} prefect
Tenacity:
Streak: Colourless, yellowish or green
Synonyms/varieties:
Comments:
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