Formula: (Bi,Pb)3Te4
Origin of name: for John Rucklidge, Canadian mineralogist
Crystal system: hexagonal
Crystal class: -3 2/m
Twinning:
Unit cell:
Colour: silver-white
Diaphaneity:
Luster: metallic
Habit: tabular grains, to 0.05 mm, foliated aggregates
Hardness:
Specific gravity: 7.74
Cleavage: none
Tenacity:
Streak: lead-gray
Synonyms/varieties:
Comments:
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