Formula: SbNbO4
Origin of name: from Latin stibium = antimony and columbite
Crystal system: orthorhombic
Crystal class: mm2
Twinning:
Unit cell:
Colour: brown, reddish brown, brownish yellow
Diaphaneity: translucent, transparent in thin fragments
Luster: adamantine to resinous
Habit: crystals prismatic, vertically striated, twinned
Hardness: 5.5
Specific gravity: 5.98
Cleavage: 2; {010} distinct, {100} indistinct
Tenacity:
Streak: yellow brown
Synonyms/varieties:
Comments: series with stibiotantalite
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