Formula: Pb3(CO3)2(OH)2
Origin of name: From Greek hydor - water and cerussite
Crystal system: Hexagonal
Crystal class: Unknown
Twinning:
Unit cell: a = 5.24 Ǻ, c = 23.74 Ǻ
Colour: Colourless, white, gray
Diaphaneity:
Luster: Adamantine, pearly on {0001}
Habit: Crystals thin to thick tabular with hexagonal outline, or steep pyramidal
Hardness: 3.5
Specific gravity: 6.80
Cleavage: 1; {0001} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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