fluorspar


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fluorspar:

see fluoritefluorite
or fluorspar
, mineral appearing in various colors, e.g., green, yellow-brown, rose, and red. Chemically, it is calcium fluoride, CaF2. Its crystals, commonly cubic, are transparent or translucent and under certain conditions exhibit fluorescence.
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fluorspar

[′flu̇r‚spär]
(mineralogy)

fluorspar

, fluor (US and Canadian), fluorite
a white or colourless mineral sometimes fluorescent and often tinted by impurities, found in veins and as deposits from hot gases. It is used in the manufacture of glass, enamel, and jewellery, and is the chief ore of fluorine. Composition: calcium fluoride. Formula: CaF2. Crystal structure: cubic
References in periodicals archive ?
Table 26: US Recent Past, Current & Future Analysis for Fluorspar by End Use Segment - Hydrofluoric Acid & Aluminum Fluoride, Basic Oxygen Furnaces, Electric Furnaces and Other Uses Independently Analyzed With Annual Consumption in Thousand Metric Tons for years 2001 through 2010 (includes corresponding Graph/Chart) III-3
The petition by the community comes after the Kenya Fluorspar Company suspended mining operations and laid off workers owing to slump in fluorspar prices in the world market.
It includes magnesium, cobalt, niobium, fluorspar, platinum, gallium, rare earths, graphite and tungsten.
For instance, Washington complains: "China imposes export duty rates, 'temporary' export duty rates, and/or 'special' export duty rates of various magnitudes on bauxite, coke, fluorspar, magnesium, manganese, silicon metal, yellow phosphorus, and zinc" not permitted under China's WTO accession agreement.
St Lawrence's story is captured in the subtitle, "Industrial Carnage," and the carnage of the effects of fluorspar is what gets spoken of most frequently by surviving miners and their families.
Over the period, for example, the United States has (1) consistently relied on imports to provide between 77 percent and 100 percent of its fluorspar needs--a key ingredient in the manufacture of aluminum, gasoline, steel, and uranium fuel; (2) fluctuated in its reliance on imports to meet its need for copper, importing copper in most years and providing net exports in 1975 and 1991; (3) decreased its reliance on imports of nickel from a high of 80 percent in 1978 to a estimated low of 17 percent in 2007; (4) consistently been a net exporter of gold between 1982 and 2003; and (5) been a net exporter of magnesium metal until 1997, when the United States began to import magnesium metal.
Under permission granted in 1952, the operator can only extract limestone as a by-product of extracting fluorspar and bayerites, which are both vein minerals found within limestone and used industrially and ornamentally.
The Illinois fluorspar district has been famous as a source of fluorite and galena since 1812, although in the early history of the district only galena was mined (for lead and silver).
Fluorspar industry--Health aspects--Newfoundland and Labrador--St.
Although known by various names, the blue banded fluorspar of Derbyshire is not found anywhere else in the world, and as such, has been mined for centuries.
The primary revenue sources in the city are mining (diatomite, fluorspar, gold, gypsum, iron ore, lead, mercury, silver and tungsten), agriculture, retail trade and tourism.