Formula: Cu3TeO6 . H2O
Origin of name: After locality; McAlpine mine, Tuolumne Co., California
Crystal system: Cubic
Crystal class: Unknown
Twinning:
Unit cell:
Colour: Dark green-black, emerald-green
Diaphaneity: Transparent to translucent
Luster: Adamantine
Habit: µm size sheaves of fibrous or prismatic grains forming coatings and mm-size cryptocrystalline nodules lining vugs at Centennial Eureka Mine,
Hardness:
Specific gravity:
Cleavage: None
Tenacity:
Streak: Light green
Synonyms/varieties:
Comments:
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