توریت

Thorite, (Th,U)SiO4, is a rare nesosilicate of thorium that crystallizes in the tetragonal system and is isomorphous with zircon and hafnon. It is the most common mineral of thorium and is nearly always strongly radioactive. Thorite was discovered in 1828 on the island of Løvøya, Norway, by the vicar and mineralogist, Hans Morten Thrane Esmark. First specimens of Thorite were sent to his father, Jens Esmark, who was a professor of mineralogy and geology. It was named in 1829 to reflect its thorium content.

Key facts

Mineral.boxbgcolor: 926339
Mineral.name: Thorite
Mineral.boxtextcolor: fff
Mineral.image: Thorite-288916.jpg
Mineral.imagesize: 260px
Mineral.caption: Thorite crystal from the Kemp uranium mine in Ontario (size: 2.2 x 2.2 x 1.6 cm)
Mineral.category: Silicate mineral
Mineral.formula: (Th,U)SiO4
Mineral.IMAsymbol: Thr
Mineral.strunz: 9.AD.30
Mineral.system: Tetragonal
Mineral.class: Ditetragonal dipyramidal (4/mmm) H-M symbol: (4/m 2/m 2/m)
Mineral.symmetry: I41/amd
Mineral.unit cell: a = 7.13, c = 6.32 [Å]; Z = 4
Mineral.color: Yellow-orange, brownish yellow, brownish black, black, green
Mineral.habit: In square prisms, or pseudo-octahedral crystals; also massive
Mineral.cleavage: Distinct on {110}
Mineral.fracture: Conchoidal

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Wikidata facts

Subclass of: cyclosilicates
Named after: thorium
Image: Thorite-288916.jpg

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Nickel-Strunz '10th ed', review of (9th ed/ 2009 update): 9.AD.30
Commons category: Thorite
chemical formula: ThSiO₄
Nickel-Strunz 9th edition (updated 2009): 9.AD.30
crystal system: tetragonal crystal system
described by source: Encyclopædia Britannica 11th edition
IMA Mineral Symbol: Thr
Strunz 8th edition (series ID, updated): VIII/A.07

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