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The majority of the world's fluorspar is supplied by China and Mexico. Fluorine is rarely used in its pure form, but many compounds of fluorine are used by industry.One of the most popular applications of fluorine is for refrigerant gases.Fluoride research had its beginnings in 1901, when a young dental school graduate named Frederick Mc Kay left the East Coast to open a dental practice in Colorado Springs, Colorado.When he arrived, Mc Kay was astounded to find scores of Colorado Springs natives with grotesque brown stains on their a glass retort, which was greatly corroded by the product; as a result, vessels made of metal were used in subsequent experiments with the substance.The nearly anhydrous acid was prepared in 1809, and two years later the French physicist , “to flow.” The mineral subsequently proved to be a source of the element, which was accordingly named fluorine.These processes result in All of these processes confuse the stratigraphic record.

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However, we must be careful to note whether or not the fossil comes from the mixed strata zone of the filled in hole..It is readily found in minerals in the Earth's crust including fluorspar, fluorapatite, and cryolite.The main source of commercial fluorine is fluorspar (which is also called fluorite).However, the assumption of contemporaneity may not always be correct.This is due to the fact that one or both of the objects may have been moved or redeposited into a different location.The principal fluorine-containing minerals are (1) fluorspar, deposits of which occur in Illinois, Kentucky, Derbyshire, southern Germany, the south of France, and Russia and the chief source of fluorine, (2) makes it possible to pack a relatively large number of fluorine atoms or ions around a given coordination centre (central atom) where it forms many stable complexes—for example, hexafluorosilicate (Si F. No other substance, therefore, is able to oxidize the fluoride anion to the free element, and for this reason the element is not found in the free state in nature.