Formula: (Fe,Mn)2(Nb,Ta)2WO10
Origin of name: after locality Qitianling, Hunan, China
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell: a = 23.706, b = 5.723, c = 5.045
Colour: Black
Diaphaneity: Opaque to semitransparent
Luster: Submetallic to metallic
Habit: crystals platy to 0.01 by 0.1 by 0.2 mm
Hardness: 5 to 5.5
Specific gravity: 6.42
Cleavage: 1; {100} distinct
Tenacity:
Streak: Dark brown
Synonyms/varieties:
Comments: Moderately magnetic
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