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fluoride, a salt of hydrofluoric acid; see hydrogen fluoride. See also fluoridation; fluorine.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a compound of fluorine with other elements. The fluorides of elements in Groups I and II of Mendeleev’s periodic system are solids with an ionic element—fluorine bond; the fluorides of most elements in Groups VI–VII are gases with a covalent element—fluorine bond. Compounds containing a C—F bond form numerous classes of fluorocarbons; the higher fluorides of many metals, such as U, V, Mo, W, and Re, are volatile substances. Fluorides occur in nature as constituents of minerals. In terms of chemical properties, the fluorides of halogens, inert gases, oxygen, nitrogen, and many other elements in higher oxidation states (for example, PtF5, CoF3, and AgF2) are oxidizing agents; the fluorides of arsenic, antimony, and boron are strong Lewis acids (seeACIDS AND BASES).

Fluorides can be obtained by the interaction of fluorine with elements, by the action of hydrogen fluoride on metals, and by other methods.

Hydrogen fluoride, oxyfluorides, and nitrogen fluorine compounds are widely used. The chlorine fluorides C1F3 and C1F5 are rocket-fuel oxidizing agents; C1F3 also serves as a fluorinating agent in the preparation of uranium hexafluoride, UF6, which is used in the atomic industry for the isotope separation of uranium. The volatile fluorides of metals are used in the application of metallic coatings. The fluorides of lithium, magnesium, calcium, strontium, barium, and other metals are used as raw materials in the manufacture of optical glass. (See alsoCRYOLITE.)


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The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


(inorganic chemistry)
A salt of hydrofluoric acid, HF, in which the fluorine atom is in the -1 oxidation state.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


1. any salt of hydrofluoric acid, containing the fluoride ion, F--
2. any compound containing fluorine, such as methyl fluoride
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Although sulfuryl fluoride has been observed to cause basal ganglia injury in animals (4), this is the first report of basal ganglia injury in humans resulting from systemic sulfuryl fluoride poisoning. This exposure underscores the importance of strict compliance with pesticide label requirements.
The calculated calcium levels that would coexist in fluid with a given fluoride level from solubility considerations were compared with actual measurements of blood levels of calcium and fluoride ion in victims of fluoride poisoning (Gessner et al.
Although acute fluoride poisoning may be neurotoxic to adults, most of the epidemiological information available on associations with children's neurodevelopment is from China, where fluoride generally occurs in drinking water as a natural contaminant, and the concentration depends on local geological conditions.
The possibility of fluoride poisoning isn't my only worry about drinking water.
Burkhart (1980), "Acute Fluoride Poisoning in a New Mexico Elementary School," Pediatrics, 65:897-900.
Hodge (See Earth Island Journal, Winter, Spring '98) listed some of the symptoms of fluoride poisoning found in industrial workers: osteosclerosis, ossifications of ligamentous attachments, sinus trouble, perforation of the nasal septum, chest pains, coughs, thyroid disorders, anemia, dizziness, weakness and nausea.
Diagnosis and treatment of chronic fluoride poisoning: A receptor malfunction disease [online video].
Fluorosis (chronic fluoride poisoning) is most easily detected in the teeth, in the form of mottling or the tooth enamel, and the two first years of life are most important to fluorosis development in the permanent central incisors, which are of most concern aesthetically (Hong et al.
FORMER GP Diane Phillips believes fluoride poisoning ruined her health.
With 2 or 3 ppm, nearly all children will be affected by this first (and only visible) sign of fluoride poisoning.