Formula: Cu4(SO4)(OH)6.2H2O
Origin of name: for Caleb Wroe Wolfe (1908-1980), crystallographer, Boston University.
Crystal system: Monoclinic
Crystal class: m
Twinning: By reflection on {001} and {100}, yielding fourlings
Unit cell: a = 6.058, b = 6.656, c = 14.36, β = 93.467°
Colour: Deep greenish blue, greenish blue
Diaphaneity:
Luster: Vitreous
Habit: Crystals to 1 mm, twinned, encrustations
Hardness: 2.5
Specific gravity: 3.27
Cleavage: 3; {010}, {100} and {001} perfect
Tenacity:
Streak: Light blue
Synonyms/varieties:
Comments: dimorphous with langite
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