Formula: (UO2)3(OH)2(SeO3)2 . 5H2O
Origin of name: For Patrick Haynes, American geologist
Crystal system: Orthorhombic
Crystal class: mm2 or 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: Amber-yellow
Diaphaneity: Transparent to translucent
Luster: Vitreous
Habit: Tablets or acicular prismatic rosettes to 3 mm across
Hardness: 1.5 to 2
Specific gravity: 4.1
Cleavage: 1; {010} easy
Tenacity:
Streak:
Synonyms/varieties:
Comments: Fluoresces yellowish green
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