Formula: Pb(Mn,Mg)Fe16O27
Origin of name: For Bengt Lindqvist, Swedish museum curator
Crystal system: Hexagonal
Crystal class: 6/m 2/m 2/m
Twinning:
Unit cell:
Colour: Black with faint brownish tint
Diaphaneity: Opaque
Luster: Submetallic
Habit: Tabular, to 5 mm
Hardness:
Specific gravity:
Cleavage: 1; {0001} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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