Formula: (Fe,Mg,Mn)2Al4Si2O10(OH)4
Origin of name: From chlorite, which it was thought to resemble
Crystal system: Monoclinic (possibly triclinic)
Crystal class: 2/m or 1
Twinning:
Unit cell:
Colour: Dark gray, greenish gray to greenish black
Diaphaneity: Translucent
Luster: Pearly on cleavage
Habit: Crystals tabular, pseudohexagonal, rare; massive, foliated, thin scales or plates
Hardness: 6.5
Specific gravity: 3.61
Cleavage: 3; {001} prefect, {110} distinct, {010} parting
Tenacity:
Streak: White, grayish, greenish
Synonyms/varieties:
Comments: Series with carboirite
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