Formula: Ca(UO2)2V2O8.5-8H2O
Origin of name: after locality Tyuya Muyun Hill, Uzbekistan
Crystal system: orthorhombic
Crystal class: unknown
Twinning:
Unit cell: a = 10.36 Å, b = 20.40 Å, c = 80.36 Å
Colour: greenish yellow to yellow
Diaphaneity:
Luster: adamantine to waxy
Habit: crystals lath-like and scales, tiny, faces dull and curved, fan-shaped and radial aggregates, thin coatings, powdery
Hardness: about 2
Specific gravity: 3.3 to 3.6
Cleavage: 3; {001} perfect, micaceous, {010}and {100} distinct
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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