Formula: (Mg,Fe)5Al(Si3Al)O10(OH)8
Origin of name: From Greek klinen to incline and chloros green
Crystal system: Monoclinic
Crystal class: 2/m
Twinning: On {001} about [310] axis
Unit cell: a = 5.32 Ǻ, b = 9.21 Ǻ, c = 14.29 Ǻ, β = 97.1°
Colour: Colourless, white, yellowish, pale green to grass-green
Diaphaneity:
Luster: Pearly, greasy, dull
Habit: Crystals tabular, hexagonal cross section; massive, foliated, coarse scaly granular, fine granular, earthy
Hardness: 2 to 2.5
Specific gravity: 2.63 to 2.98
Cleavage: 1; {001} perfect
Tenacity: Laminae flexible, inelastic
Streak: Greenish to white
Synonyms/varieties: Kammererite (Cr-rich var.), leuchtenbergite (Fe-free var.), pennine/penninite (prismatic var.), ripidolite (Fe2+-rich var.), sheridanite
Comments: Series with chamosite
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