Formula: (Ca,Pb)Bi2(CO3)2O2
Origin of name: For Aldolph Beyer, German mining engineer
Crystal system: Tetragonal
Crystal class: 4/m 2/m 2/m
Twinning:
Unit cell:
Colour: White, yellowish white to bright yellow, grayish green, gray
Diaphaneity:
Luster: Vitreous
Habit: Crystals as thin rectangular plates; compact, earthy masses
Hardness: 2 to 3
Specific gravity: 6.56
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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