Formula: Cu2Cl(OH)3
Origin of name: Locality; Botallack mine, Cornwall, England
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Bluish-green, pale green to green
Diaphaneity:
Luster:
Habit: Crystals minute in crusts or columnar; powdery
Hardness:
Specific gravity: 3.6
Cleavage: 1; {100} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments: Trimorphous with atacamite and paratacamite
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