Formula: Pt
Origin of name: from Spanish plata = river
Crystal system: cubic
Crystal class: 4/m -3 2/m
Twinning: on {111}
Unit cell: a = 3.923 Å
Colour: whitish steel-gray to dark gray
Diaphaneity: opaque
Luster: metallic
Habit: crystals rare, cubic, small, distorted, minute grains or scales, nuggets
Hardness: 4 to 4.5
Specific gravity: 21.440
Cleavage: none
Tenacity: hackly, malleable and ductile
Streak:
Synonyms/varieties:
Comments: sometimes magnetic
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