Formula: Pb3Cu(CrO4)SiO3(OH)4 . 2H2O
Origin of name: For Louis Macquart, French chemist
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Orange
Diaphaneity:
Luster:
Habit: Crystals euhedral, to 1 mm
Hardness: 3.5
Specific gravity: 5.49
Cleavage: 1; {100} good
Tenacity:
Streak: Pale orange
Synonyms/varieties:
Comments:
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