Formula: Cu2(AsO4)(OH)
Origin of name: named for olive = green colour
Crystal system: orthorhombic
Crystal class: mmm
Twinning:
Unit cell: a = 8.22 Å, b = 8.64 Å, c = 5.95 Å
Colour: olive-green, greenish brown, brown, straw-yellow, grayish
Diaphaneity:
Luster: vitreous to adamantine
Habit: crystals short prismatic to acicular, globular, reniform or nodular, fibrous structure, massive, granular to earthy
Hardness: 3
Specific gravity: 4.38
Cleavage: 2; {011} and {110} indistinct
Tenacity: conchoidal to uneven
Streak:
Synonyms/varieties:
Comments: series with adamite
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