apatite


apatite
1. Generic name for a class of minerals with compositions that are variants of the formula D5T3M, where D is a divalent cation, T is a trivalent tetrahedral compound ion, and M is a monovalent anion; calcium phosphate apatites are important mineral constituents of bones and teeth. See hydroxyapatite. 2. Ca5(PO4)3(OH,F,Cl).

* * *

ap·a·tite 'ap-ə-.tīt n any of a group of calcium phosphate minerals occurring variously as hexagonal crystals, as granular masses, or in fine-grained masses as the chief constituent of bones and teeth and of phosphate rock esp calcium phosphate fluoride Ca5F(PO4)3

* * *

ap·a·tite (apґə-tīt) [Gr. apatan to deceive] any of a group of minerals with the general formula 10Ca2+: 6PO43−: X where X is a monovalent anion such as a chloride, carbonate, fluoride, or hydroxyl ion; when it contains a hydroxyl ion the compound is hydroxyapatite (q.v.), an important inorganic constituent of teeth and bones.

Medical dictionary. 2011.

Look at other dictionaries:

  • Apatite — Catégorie VIII : phosphates, arséniates, vanadates[1] Apatite Québec (Xl 32cm) …   Wikipédia en Français

  • apatite — [ apatit ] n. f. • 1802; d ab. en all.; du gr. apatân « tromper », c. à d. « pierre trompeuse, pseudo précieuse » ♦ Minér. Phosphate de calcium en cristaux ou agrégats, à inclusions fréquentes de chlore (chlorapatiten. f.), de fluor, de silicium… …   Encyclopédie Universelle

  • Apatite — Ap a*tite, n. [Gr. ? deceit, fr. ? to deceive; it having been often mistaken for other minerals.] (Min.) Native phosphate of lime, occurring usually in six sided prisms, color often pale green, transparent or translucent. [1913 Webster] …   The Collaborative International Dictionary of English

  • apatite — s. f. [Mineralogia] Fosfato de cálcio natural.   ♦ Grafia no Brasil: apatita …   Dicionário da Língua Portuguesa

  • apatite — [ap′ə tīt΄] n. [Ger apatit < Gr apatē, deceit + ITE1: so named from being mistaken for other minerals] any of a group of variously colored, hard, hexagonal calcium minerals, Ca5 (PO4, CO3) 3 (F,OH,Cl), found mainly in sedimentary rocks, esp.… …   English World dictionary

  • Apatite — Not to be confused with appetite. Apatite General Category Phosphate mineral group Chemical form …   Wikipedia

  • apatite — /ap euh tuyt /, n. a common mineral, calcium fluorophosphate, Ca5FP3O12, occurring in individual crystals and in masses and varying in color, formerly used in the manufacture of phosphate fertilizers. [1795 1805; < Gk apát(e) trickery, fraud,… …   Universalium

  • apatite — noun /ˈæp.ə.taɪt/ A calcium fluoride phosphate of variable composition, sometimes used in the manufacture of fertilizer. We had prepared, by precipitation methods, finely divided crystalline apatites that were similar in crystal size and x ray… …   Wiktionary

  • apatite — apatitas statusas T sritis chemija apibrėžtis Mineralas. formulė Ca₅[(F,OH)|(PO₄)₃] atitikmenys: angl. apatite rus. апатит …   Chemijos terminų aiškinamasis žodynas

  • apatite — noun Etymology: German Apatit, from Greek apatē deceit Date: 1803 any of a group of calcium phosphate minerals occurring in various colors as hexagonal crystals, as granular masses, or in fine grained masses as the chief constituent of phosphate… …   New Collegiate Dictionary

  • apatite II — a proprietary preparation of fish bones used in removing heavy metals from soil and water. The metals are chemically bound into new minerals that do not dissolve or leach over extremely long time periods …   Dictionary of ichthyology


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.