Formula: ThSiO4
Origin of name: For Colin Hutton, New Zealand - American mineralogist
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 6.8, b = 6.96, c = 6.54, β = 104.99°
Colour: Colourless to pale cream
Diaphaneity: Transparent
Luster: Adamantine
Habit: Anhedral grains, microscopic
Hardness: 4.5
Specific gravity: 7.10
Cleavage: 2; {001} distinct, {100} indistinct
Tenacity: Conchoidal fracture
Streak: White
Synonyms/varieties:
Comments: Dimorphous with thorite; fluoresces dull white with pink tinge
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