Fluoride (redirected from systemic fluoride)

fluoride, a salt of hydrofluoric acid; see hydrogen fluoride. See also fluoridation; fluorine.

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fluoride

1. any salt of hydrofluoric acid, containing the fluoride ion, F^--

2. any compound containing fluorine, such as methyl fluoride

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fluoride [′flu̇r‚īd]

(inorganic chemistry)

A salt of hydrofluoric acid, HF, in which the fluorine atom is in the -1 oxidation state.

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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