Formula: Fe(Mn,Ca,Mg)Si4O10(OH)3·10H2O
Origin of name: After C. Sturt
Crystal system: Amorphous
Crystal class:
Twinning:
Unit cell:
Colour: Black
Diaphaneity:
Luster: Vitreous, greasy
Habit:
Hardness: 3-3.5
Specific gravity: 2.05
Cleavage:
Tenacity:
Streak: Yellowish brown
Synonyms/varieties:
Comments: IMA status questionable, probably a member of the hisingerite-neotocite series
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