Also found in: Dictionary, Thesaurus, Wikipedia.
Related to Thorite: thorium, uraninite, monazite


ThSiO4 A brownish-yellow to brownish-black and black radioactive mineral that is tetragonal in crystallization; hardness is about 4.5 on Mohs scale, and specific gravity is 4.3-5.4.



a mineral of the class of nesosilicates, ThSiO4. The varieties of thorite are orangite (a transparent orange variety), uranothorite (up to 10 percent UO2), thorogummite (up to 15 percent H2O), ferrithorite (up to 13 percent Fe2O3), calciothorite, and auerlite (a phosphorus-containing thorite).

In addition, thorite contains aluminum, titanium, manganese, and rare earths as admixtures. Thorite crystallizes in a tetragonal system, forming prismatic or columnar crystals. It is usually encountered in the form of granular aggregates. Many thorites are metamict minerals. Thorite is black, red-brown, or orange. Unaltered uranothorite is transparent and olive green. The hardness of thorite on Mohs’ scale is 4.5–5, and its density is 4,100–6,700 kg/m3.

Thorite is highly radioactive. It is found as an accessory mineral in granites, some alkaline rocks, pegmatites, and hydrothermal veins. Large accumulations of thorite are usually not formed; the mineral is obtained from placers as a by-product with zircon andcassiterite.

References in periodicals archive ?
Thorite marketing manager Richard Vaughan (left) and managing director Stephen Wright |(second left) with members of Huddersfield University's Team HARE and the innovative race car they have designed and built
Thorite apprentices (back row left to right) Dominik Hull, Lewis |Gordon and, Sam Edmands with (front) Joe Cotterill, Adam Dyson and Christopher Scott
As the recognised authority on guidance and system supply expertise to the food industry Thorite is constantly re-evaliuiting every aspect of its service.
Matthew's grandmother, Brenda, was employed by Thorite from 1956 to 1981, latterly as secretary to the then managing director Teddy Wright, greatgrandson of the company's founder.
As with their established pneumatics business, Thorite can not only supply the highest quality hydraulic products, but also provides engineering teams with expertise in both installation and servicing of hydraulic systems on a nationwide basis.
Thorite sales director Alan Donkersley said: "Our inaugural Lunch & Learn proved more successful than we dared hope, with an impressive queue of CMB staff waiting for the exhibition doors to open.
As the UK's biggest distributor of pneumatic products and process systems Thorite has long been a provider of industrial systems solutions, specifying and installing a huge variety of equipment selected for its efficiency and value.
Mr Allatt, 50, joined Thorite three years ago as key account manager based at the Huddersfield sales and service centre on Barge Street.
Alternatively they can be ordered from any of the company's nine regional Sales & Service centres located throughout Yorkshire, Lancashire and the North East and the "Festo Pun H Food Industry Pneumatics Tubing" brochure is available to download from the Thorite website.
Thorite personnel will be on hand to explain that about 10% of utility energy expenditure goes on generating compressed air.
The UK's biggest distributor of compressed air products and process systems, Thorite, has supplied three PIAB vacuum pumps to McCambridge Foods Ltd of Blackburn.
Thorite, which has a base at Barge Street, Longroyd Bridge, has renewed its membership of SAFEcontractor, a programme which recognises high standards of health and safety practise among UK contractors.