Formula: SbTaO4
Origin of name: from composition, Latin stibium = antimony
Crystal system: orthorhombic
Crystal class: mm2
Twinning: common on {010} about [001] twin axis, polysynthetic
Unit cell: a = 4.911 Å, b = 11.81 Å, c = 5.535 Å
Colour: dark brown to light yellowish brown, yellowish steel-gray
Diaphaneity:
Luster: vitreous to resinous
Habit: crystals prismatic, thin tabular to nearly equant, striated, twinned
Hardness: 5 to 5.5
Specific gravity: 7.35
Cleavage: 2; {010} distinct, {100} indistinct
Tenacity: subconchoidal, brittle
Streak:
Synonyms/varieties:
Comments: series with stibiocolumbite
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