Formula: (V,Fe)O(OH)
Origin of name: After locality; Montrose Co., Colorado
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: Black
Diaphaneity: Opaque
Luster: Submetallic
Habit: Crystals bladed, microscopic
Hardness:
Specific gravity: 4.0
Cleavage: 2; {010} and {110} good
Tenacity:
Streak: Black
Synonyms/varieties:
Comments:
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