Formula: (Ca,Na)(Nb,Ti,Fe)O3
Origin of name: Locality; La Trappe, Quebec, Canada
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: Black
Diaphaneity: Opaque
Luster: Submetallic
Habit: Crystals cubic about 0.2 mm
Hardness: 5.5
Specific gravity: 4.40
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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