Formula: PbFe4O7
Origin of name: from composition, Latin plumbum = lead, ferrum = iron
Crystal system: hexagonal
Crystal class: 6/m 2/m 2/m
Twinning:
Unit cell:
Colour: black
Diaphaneity: opaque
Luster: submetallic
Habit: crystals thick tabular, massive, cleavable
Hardness: 6.5
Specific gravity: 6.07
Cleavage: 1; {0001} distinct
Tenacity:
Streak: red
Synonyms/varieties:
Comments: dissolves slowly in cold HCl
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