Formula: PbCrO4
Origin of name: From Greek for saffron
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 7.12 Å, b = 7.44 Å, c = 6.80 Å, β = 102.4°
Colour: Orange-red, red-orange, red, orange, red, yellow
Diaphaneity:
Luster: Adamantine to vitreous
Habit: Crystals slender prismatic, elongated along c axis; octahedral or acute rhombohedral; jackstraw aggregates; massive
Hardness: 2.5 to 3
Specific gravity: 5.99
Cleavage: 3; {110} distinct {001} and {100} indistinct
Tenacity: Brittle
Streak: Orange-yellow
Synonyms/varieties:
Comments:
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