Formula: FeSb2O4
Origin of name: for F. Schafarzik, Hungarian mineralogist
Crystal system: tetragonal
Crystal class: 4/m 2/m 2/m
Twinning:
Unit cell: a = 8.59, c = 5.92
Colour: Red to reddish brown, thin splinters yellow
Diaphaneity: Opaque, translucent in thin fragments
Luster: Metallic
Habit: Crystals prismatic, striated
Hardness: 3.5
Specific gravity: 4.3
Cleavage: 3; {110} perfect, {200} good, {001} trace
Tenacity:
Streak: Yellowish brown
Synonyms/varieties:
Comments:
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