Formula: USi7O17
Origin of name: from elements in compositon
Crystal system: Orthorhombic
Crystal class: 222 or 2/m 2/m 2/m
Twinning:
Unit cell: a = 11.6, b = 14.68, c = 12.83
Colour: Yellowish white
Diaphaneity: Semitransparent
Luster: Vitreous
Habit: Crystals acicular, crystals are only visible under the scanning electron microscope at high magnification
Hardness:
Specific gravity: 3.25
Cleavage: None
Tenacity:
Streak: White
Synonyms/varieties:
Comments: Radioactive
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