These silicates

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• Mesoporous silicates — are silicates with a special morphology.BackgroundPorous inorganic solids have found great utility as catalysts and sorption media because of their large internal surface area, i.e. the presence of voids of controllable dimensions at the atomic,… …   Wikipedia

• polymer, inorganic — Introduction  any of a class of large molecules that lack carbon and are polymers that is, made up of many small repeating units called monomers (monomer). The word polymer is derived from the Greek term poly, meaning many, and meros, which means …   Universalium

• 81P/Wild — Comet Wild 2 (81P/Wild) nucleus in 2004 Discovery Discovered by: Paul Wild Discovery date: 1978 Alternate designations: 1978 XI; 1984 XIV; 1990 XXVIII …   Wikipedia

• amphibole — /am feuh bohl /, n. Mineral. any of a complex group of hydrous silicate minerals, containing chiefly calcium, magnesium, sodium, iron, and aluminum, and including hornblende, tremolite, asbestos, etc., occurring as important constituents of many… …   Universalium

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• clay mineral — any of a group of hydrous aluminum silicate minerals, as kaolinite, illite, and montmorillonite, that constitute the major portion of most clays. [1945 50] * * * Any of a group of important hydrous aluminum silicates with a layered structure and… …   Universalium

• Mineral — For other uses, see Mineral (disambiguation). An assortment of minerals. A mineral is a naturally occurring …   Wikipedia

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• chemical element — Introduction also called  element,         any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed.       This article considers the… …   Universalium

• high-pressure phenomena — ▪ physics Introduction       changes in physical, chemical, and structural characteristics that matter undergoes when subjected to high pressure. pressure thus serves as a versatile tool in materials research, and it is especially important in… …   Universalium

• meteorite — meteoritic /mee tee euh rit ik/, meteoritical, meteorital /mee tee euh ruyt l/, adj. /mee tee euh ruyt /, n. 1. a mass of stone or metal that has reached the earth from outer space; a fallen meteoroid. 2. a meteoroid. [1815 25; METEOR + ITE1] * * …   Universalium