Formula: Pd(Bi,Pb)2
Origin of name: for Nikolai N. Urvantsev (1893-1985), Russian geologist who discovered the Norilsk deposits.
Crystal system: Tetragonal
Crystal class: 4/m 2/m 2/m
Twinning:
Unit cell: a = 3.3628, c = 12.902
Colour: Steel gray
Diaphaneity: Opaque
Luster: Metallic
Habit: Irregular polymetallic intergrowth, to 4 mm
Hardness: 2.5
Specific gravity: 9.66
Cleavage: 1; perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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