crystallite

crystallite
crystallitic /kris'tl it"ik/, adj.
/kris"tl uyt'/, n. Mineral.
a minute body in glassy igneous rock, showing incipient crystallization.
[1795-1805; CRYSTALL- + -ITE1]

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      any of a type of microscopic body occurring in such glassy igneous rocks as obsidian and pitchstone. Crystallites are regarded as incipient or embryonic crystals, though they often have no recognizable crystallographic form and are too small to polarize light. They occur when magma (molten rock material) congeals so rapidly that crystallization remains incomplete. Crystallites are distinguished from microlites, which are slightly larger forms recognizable as mineral species.

      There are several varieties of crystallites, and names have been assigned to indicate their particular shapes. Globulites, for example, are oval or spherical; scopulites may be feathery or flowerlike. The faster-growing faces of a crystallite become smaller, so that the slower-growing faces are the longer ones. Rodlike crystallites composed of a number of smaller elongate forms are called bacillites (bacillite). Belonites are elongated with pointed or rounded ends; they include the forms called longulites (elongated), spiculites (tapered toward both ends), and clavalites (dumbbell-shaped).

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Universalium. 2010.

См. также в других словарях:

  • Crystallite — Crys tal*lite (kr?s tal l?t), n. [See {Crystal}.] (Min.) A minute mineral form like those common in glassy volcanic rocks and some slags, not having a definite crystalline outline and not referable to any mineral species, but marking the first… …   The Collaborative International Dictionary of English

  • crystallite — [kris′təl īt΄] n. [ CRYSTALL(O) + ITE1] 1. a tiny, embryonic crystal, too small to be identified with any mineral species 2. a rock consisting mainly of such tiny crystals crystallitic [kris΄təl it′ik] adj …   English World dictionary

  • Crystallite — Galvanized surface with visible crystallites of zinc. Crystallites in the steel under the coating are microscopic. Crystallites are small, often microscopic crystals that, held together through highly defective boundaries, constitute a… …   Wikipedia

  • crystallite — kristalitas statusas T sritis Standartizacija ir metrologija apibrėžtis Mažas netaisyklingo išorinio pavidalo, bet tvarkingos vidinės sandaros kristalas. atitikmenys: angl. crystallite vok. Kristallit, m rus. кристаллит, m pranc. cristallite, f …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • crystallite — kristalitas statusas T sritis fizika atitikmenys: angl. crystallite vok. Kristallit, m rus. кристаллит, m pranc. cristal élémentaire, m; cristallite, m …   Fizikos terminų žodynas

  • crystallite — noun Etymology: German Kristallit, from Greek krystallos Date: 1805 1. a. a minute mineral form (as in glassy volcanic rocks) that marks the beginning of crystallization b. a single grain in a polycrystalline substance 2 …   New Collegiate Dictionary

  • crystallite — noun A small region of a solid that consists of a single crystal; a grain …   Wiktionary

  • crystallite — Смотри Кристаллит …   Энциклопедический словарь по металлургии

  • crystallite — n. type of crystal, crystallized igneous rock …   English contemporary dictionary

  • crystallite — [ krɪst(ə)lʌɪt] noun an individual perfect crystal or region of regular crystalline structure in the substance of a material. ↘a very small crystal …   English new terms dictionary


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