fluoride

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fluoride,

a salt of hydrofluoric acid; see hydrogen fluoridehydrogen fluoride,
chemical compound, HF, a colorless, fuming liquid or colorless gas that boils at 19.54°C;. It is miscible with water and is soluble in benzene, toluene, and concentrated sulfuric acid.
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. See also fluoridationfluoridation
, process of adding a fluoride to the water supply of a community to preserve the teeth of the inhabitants. Tooth enamel ordinarily contains small amounts of fluorides and when the amount is augmented through the intake of fluoridated water, especially during the
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; fluorinefluorine
, gaseous chemical element; symbol F; at. no. 9; at. wt. 18.9984; m.p. −219.6°C;; b.p. −188.14°C;; density 1.696 grams per liter at STP; valence −1. Fluorine is a yellowish, poisonous, highly corrosive gas.
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.

Fluoride

 

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.)

REFERENCES

See references under .

A. V. PANKRATOV

fluoride

[′flu̇r‚īd]
(inorganic chemistry)
A salt of hydrofluoric acid, HF, in which the fluorine atom is in the -1 oxidation state.

fluoride

1. any salt of hydrofluoric acid, containing the fluoride ion, F--
2. any compound containing fluorine, such as methyl fluoride
References in periodicals archive ?
Les autorites tiennent cependant a preciser que la Floride n'est pas aussi violente que le reste des Etats du pays.
Although I have to confess I don't remember the sixties' Renault Floride, the modern Megane take on it certainly captures the spirit of the era.
The Floride is the sort of car one might take one look at and decide to buy there and then on sheer impulse.
La scene de la fete dans le train qui mene les filles en Floride est de ce point de vue edifiante : alors que Jerry / Daphne cherche a organiser sur sa couchette un rendezvous avec Sugar, tout le groupe, dans les couchettes alentour, s'en mele, et il finit par y avoir sur le lit de Jerry quelque sept ou huit filles que l'on n'identifie plus, le visage (et la voix) de ce dernier apparaissant par contre distinctement parmi une foret de jambes et de bras.
Les affreteurs se sont bouscules pour devier les cargaisons de volaille vers des entrepots refrigeres d'autres ports, notamment ceux de Houston et de Corpus Christi, au Texas, de Jacksonville, en Floride, et de Savannah, en Georgie.
Ces etats sont l'Alaska, la Floride, le Nevada, le New Hampshire, le Dakota du Sud, le Tennessee, le Texas, l'etat de Washington et le Wyoming (Peterson 1992).
Nous entendons ici par <<Floribec>> la <<communaute>> du Petit Quebec a Hollywood, une banlieue de Miami en Floride.
They stayed at the La Croix du Vieux Pont holiday parc, Berny Riviere, Northern France, for three nights, then spent 10 nights at the Nouvelle Floride holiday parc, MarseillanPlage.
Le fait que Floride soit sur le point d'accepter Amadour non comme son "serviteur" mais comme son "seur et parfaict amy" (71) apparait comme l'aboutissement d'un developpement sentimental qui, contrairement a un amour courtois unilateral, s'apparente a une philia reciproque construite apres bien des deliberations: ".
According to the company, the baking soda toothpaste contains the same cavity-fighting sodium floride as other varieties of Crest and is comparably priced.
based French-language paper Le Soleil de la Floride, remain offended.

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