kaolinite


kaolinite
/kay"euh leuh nuyt'/, n.
a very common mineral, hydrated aluminum disilicate, Al2Si2O5(OH)4, formed by the alteration of other minerals, esp. feldspar: the most common constituent of kaolin.
[1865-70; KAOLIN + -ITE1]

* * *

Group of common clay minerals that are hydrous aluminum silicates and constitute the principal ingredients of kaolin (china clay).

The group includes kaolinite, dickite, nacrite, halloysite, and allophane. They are natural alteration products of feldspars, feldspathoids, and other silicates.

* * *

      group of common clay minerals that are hydrous aluminum silicates; they comprise the principal ingredients of kaolin (china clay). The group includes kaolinite and its rarer forms, dickite and nacrite, halloysite, and allophane, which are chemically similar to kaolinite but amorphous.

      Kaolinite, nacrite, and dickite occur as minute, sometimes elongated, hexagonal plates in compact or granular masses and in micalike piles. They are natural alteration products of feldspars, feldspathoids, and other silicates. Anauxite, which was previously regarded as a kaolinite-group mineral possessing a higher than usual silica-alumina ratio, is now considered to be kaolinite and free silica (mainly noncrystalline). For chemical formula and detailed physical properties, see clay mineral (table).

* * *


Universalium. 2010.

Look at other dictionaries:

  • Kaolinite — Catégorie IX : silicates[1] Général …   Wikipédia en Français

  • kaolinite — ● kaolinite nom féminin Silicate d aluminium hydraté, appartenant au groupe des argiles, de composition Al2Si2O5(OH)4, constituant principal du kaolin. ⇒KAOLINITE, subst. fém. CHIM. et MINÉR. Silicate d alumine hydraté constituant l un des… …   Encyclopédie Universelle

  • kaolinite — [kā′ələ nīt΄] n. a colorless or white, soft mineral, hydrous aluminum silicate, Al2Si2O5 (OH) 4, that is the main constituent of kaolin …   English World dictionary

  • Kaolinite — Kaolin General Category Silicate mineral Chemical formula Al2Si2O5(OH)4 …   Wikipedia

  • kaolinite — kaolinitas statusas T sritis chemija apibrėžtis Mineralas. formulė Al₄[(OH)₈|Si₄O₁₀] atitikmenys: angl. kaolinite rus. каолинит …   Chemijos terminų aiškinamasis žodynas

  • kaolinite — noun Date: 1867 a white mineral consisting of a hydrous silicate of aluminum that constitutes the principal mineral in kaolin • kaolinitic adjective …   New Collegiate Dictionary

  • kaolinite — noun A common hydrous aluminosilicate mineral found in sediments, soils and sedimentary rocks, AlSiO(OH); one of the kaolin group of minerals. See Also: kaolin, kaoline …   Wiktionary

  • kaolinite — [ keɪəlɪnʌɪt] noun a clay mineral which is the chief constituent of kaolin …   English new terms dictionary

  • kaolinite — ka·olin·ite …   English syllables

  • kaolinite — ka•o•lin•ite [[t]ˈkeɪ ə ləˌnaɪt[/t]] n. mir a mineral, hydrated aluminum disilicate, Al2Si2O5(OH)4, the most common constituent of kaolin • Etymology: 1865–70 …   From formal English to slang