Formula: (V,Fe)10O24.12H2O
Origin of name: for the Navajo indians, Arizona, USA
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 34.94, b = 3.597, c = 11.79, β = 95.98°
Colour: Dark brown
Diaphaneity: Opaque
Luster: Adamantine when fresh
Habit: Lath-like or fibrous to several microns
Hardness: 1.5
Specific gravity: 2.56
Cleavage: None
Tenacity:
Streak: Brown
Synonyms/varieties:
Comments:
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