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kaolinite |
Also found in: Wikipedia, Hutchinson | 0.02 sec. |
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kaolinite (kā`əlĭnīt), clay mineral crystallizing in the monoclinic system and forming the chief constituent of china clay china clay, one of the purest of the clays, composed chiefly of the mineral kaolinite usually formed when granite is changed by hydrothermal metamorphism . Usage of the terms china clay and kaolin ..... Click the link for more information. and kaolin. It is a hydrous aluminum silicate commonly formed by the weathering and decomposition of rocks containing aluminum silicate compounds; feldspar is a chief source. Kaolinite has the same chemical composition as dickite and nacrite (both of which are also clay or kaolin minerals) but differs from them in origin, in optical properties, in reaction to heat, and in certain other physical properties. Kaolinite is the basic raw material for ceramics, and large quantities are also used in the manufacture of coated paper. kaoliniteGroup 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. kaolinite [′kā·ə·lə‚nīt] (mineralogy) Al2Si2O5(OH)4A common hydrous aluminum silicate mineral found in sediments, soils, hydrothermal deposits, and sedimentary rocks. It is a member of the kaolin group of minerals, which include dickite, halloysite, nacrite, ordered kaolinite, and disordered kaolinite. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Based on the results of these trial tests, Ginn concluded and the DL Laboratories report shows that the calcined Sierra Kaolin[TM] based pigment product could be a replacement for premium, industry standard calcined kaolinite clay in flat interior latex paint applications and shared the #1 ranking order with the test standard based paint. The SK composite material was tested side-by-side against premium calcined kaolinite clay and premium ground calcium carbonate coating materials and the performance of the SK material indicate that the SK product is a viable pigment option for coating applications. Chemically, the feldspar grains in the granite have been altered to kaolinite clay, which is considerably softer than the original feldspar. |
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