Formula: (As,Sb)2(Ti,V,Fe,Fe)12O23(OH)
Origin of name: After locality; Hemlo, Ontario, Canada
Crystal system: Triclinic
Crystal class: -1
Twinning:
Unit cell:
Colour: Black
Diaphaneity: Opaque
Luster: Submetallic, metallic
Habit: Euhedral to anhedral grains to 400 x 600 µm
Hardness: 6.5 to 7
Specific gravity:
Cleavage: None
Tenacity:
Streak: Black
Synonyms/varieties:
Comments:
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