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Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF 2. It belongs to the halide minerals . It crystallizes in isometric cubic habit , although octahedral and more complex isometric forms are not uncommon.
Fluoride (/ ˈ f l ʊər aɪ d, ˈ f l ɔːr-/) [3] is an inorganic, monatomic anion of fluorine, with the chemical formula F − (also written [F] −), whose salts are typically white or colorless. Fluoride salts typically have distinctive bitter tastes, and are odorless.
Calcium fluoride is the inorganic compound of the elements calcium and fluorine with the formula CaF 2. It is a white solid that is practically insoluble in water. It occurs as the mineral fluorite (also called fluorspar), which is often deeply coloured owing to impurities.
Calcium fluoride is a classic example of a crystal with a fluorite structure. Crystallographic information can be collected via x-ray diffraction, providing information on the locations of electron density within a crystal structure.
[citation needed] Because fluoride levels in water are usually controlled by the solubility of fluorite (CaF 2), high natural fluoride levels are associated with calcium-deficient, alkaline, and soft waters. [54] Defluoridation is needed when the naturally occurring fluoride level exceeds recommended limits.
But a fluoride level of above 1.5 mg/L is found in wells and community water systems that serve over 2.9 million people in the U.S., according to the study authors. Further, the study notes ...
Two commercially important halide minerals are halite and fluorite. The former is a major source of sodium chloride, in parallel with sodium chloride extracted from sea water or brine wells. Fluorite is a major source of hydrogen fluoride, complementing the supply obtained as a byproduct of the production of fertilizer. Carnallite and ...
Since 2010, more than 150 towns or counties throughout the country have voted to keep fluoride out of public water systems or to stop adding it, according to the Fluoride Action Network, an anti ...
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