Formula: Pb(Pb,Ca)(Al,Fe,Mg)2(Si,Al)4O10(OH)2(CO3)2
Origin of name: after locality Cruz del Sur mine, Argentina
Crystal system: monoclinic
Crystal class: 2
Twinning:
Unit cell: a = 5.241, b = 8.95, c = 16.2, β = 90°
Colour: White to pale green
Diaphaneity: Transparent
Luster: Vitreous
Habit: Compact aggregates, tabular, lath-shaped
Hardness: 2 to 3
Specific gravity: 4.0
Cleavage: 1; {001} perfect
Tenacity:
Streak: White
Synonyms/varieties:
Comments:
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