Formula: BaMg(CO3)2
Origin of name: for K. Norseth, American geologist
Crystal system: hexagonal
Crystal class: -3 2/m
Twinning:
Unit cell: a = 5.02, c = 16.75
Colour: clear to milky white
Diaphaneity: Transparent to translucent
Luster: vitreous to pearly
Habit: crystals flattened rhombohedral or circular plates, thick corrugated grains or pumpkin-shaped, massive, coarse-grained
Hardness: about 3.5 (approximate)
Specific gravity: 3.84
Cleavage: 1; {10-11} rhombohedral, good
Tenacity: Hackly
Streak: White
Synonyms/varieties:
Comments:
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