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The largest documented single crystal of fluorite was a cube 2.12 meters in size and weighing approximately 16 tonnes. [23] Fluorite on barite from the Berbes mine, Ribadesella, Asturias (Spain). Fluorite crystal, 2.2 cm. In Asturias there are several fluorite deposits known internationally for the quality of the specimens they have yielded
Bowl made from Derbyshire Blue John, on display in Castleton Visitor Centre French candelabra crafted of Blue John, c. 1860. Blue John (also known as Derbyshire Spar) is a semi-precious mineral, a rare form of fluorite with bands of a purple-blue or yellowish colour.
Cerium oxide adopts the fluorite structure, space group Fm3m, #225 containing 8-coordinate Ce 4+ and 4-coordinate O 2−. At high temperatures it releases oxygen to give a non-stoichiometric, anion deficient form that retains the fluorite lattice. [6] This material has the formula CeO (2−x), where 0 < x < 0.28. [7]
Crystal of titanite with adularia and minor clinochlore on matrix Fluorite crystal sitting beside a glassy, dark green tourmaline crystal, which itself sits atop a green tourmaline of a lighter color. All sit on a bed of sparkly, bladed stark white albite Crystals of turquoise, from Copper Cities Mine, Globe-Miami District, Arizona, USA
Industrially, fluorite is used as a flux for smelting, and in the production of certain glasses and enamels. The purest grades of fluorite are a source of fluoride for hydrofluoric acid manufacture, which is the intermediate source of most fluorine-containing fine chemicals.
Fluorite crystals. Fluorine is estimated to be the 13th-most abundant element in Earth's crust and is widely dispersed in nature, entirely in the form of fluorides. The vast majority is held in mineral deposits, the most commercially important of which is fluorite (CaF 2). [4]
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