Formula: Cu2 Al2 (AsO4)2 (OH)4 . H2O
Origin of name: For Ronald Luethe, American geologist
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Blue to greenish-blue
Diaphaneity:
Luster:
Habit: Crystals tabular, 0.2 mm
Hardness: 3
Specific gravity: 4.28
Cleavage: 1; {100} distinct
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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