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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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Employing 120 people, Thorite is principally involved in the fluid power sector, specialising in the engineering, manufacturing, food processing, printing and pharmaceuticals industries, and has an annual turnover of [pounds sterling]19 million.
Thorite's engineers have proved to be of huge assistance, understanding our stringent quality requirements and installing the PC02's with minimal disruption to our production process."
"While we have apprentices in engineering, we see the Modern Apprenticeships, which include IT and marketing, as being just as important to the future of Thorite."
Norgren Pneufit S stainless steel fittings are available from stock and can be ordered from any of Thorite's 10 Sales and Service Centres throughout Yorkshire.
There are also sections which provide an insight into Thorite's specialist expertise, including Technical Services, Air System design and installation, Control Panel building and Training schemes, plus information on everything from the latest energy saving products to safety briefings.
This year, Thorite is a silver level sponsor and - in addition to specialist tools - also provided the team's Driveline Manager, Jake Stanley, with a place on the two-day foundation in pneumatics course which is run by the Thorite Academy.
As the recognised authority on guidance and system supply expertise to the food industry Thorite is constantly re-evaliuiting every aspect of its service.
A pre-sale has already been secured for Saturn Court, with a 3,500sqft unit sold to Thorite, a large supplier of air compressors, air tools, pneumatics and process products.
Frondel (1958) reported thorite from hydrothermal sulfide veins in Llallagua, but this needs confirmation.
Compressed air and fluid process systems specialists, Thorite, has introduced a new way for customers to save money when complying with the requirements of BS 6005, which covers the safety of polycarbonate bowls on filters, filter/regulators and lubricators.
FLUID power products and process systems supplier Thorite has made two key appointments at its newlyrefurbished sales and service centre in Huddersfield.
Bradford-based Thorite has long been the UK's biggest distributor of pneumatic products and process systems-and is now the country's only true "air house".