Formula: (Fe,Mg,Al,Fe)5(Si,Al)4O10(OH)8
Origin of name: for Gilles Odin, French mineralogist
Crystal system: monoclinic
Crystal class: m
Twinning:
Unit cell:
Colour: green
Diaphaneity: translucent, opaque
Luster: silky to earthy
Habit: crystals within aggregates
Hardness:
Specific gravity: 2.78
Cleavage:
Tenacity:
Streak: gray-green
Synonyms/varieties:
Comments: data are for odinite-1M, there is also a -1T polytype
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