The solid-state transformation of volcanic glass into crystalline materials (AGI, 1976, p. 117). Devitrification tends to be more prevalent in densely-welded tuffs, but may also occur in less densely-welded or unwelded pyroclastic and/or volcaniclastic deposits. The main products of devitrification are cristobalite (SiO2) and alkali feldspar (KAlSi3O8) (Cas and Wright, 1987, p. 258).

Glossary of volcanic terms. - University of Wisconsin Oshkosh. . 2001.

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  • Devitrification — is the opposite of vitrification, i.e., the process of crystallization in a formerly crystal free (amorphous) glass.[1] The term is derived from the Latin vitreus, meaning glassy and transparent.[2] Devitrification in glass art Devitrification… …   Wikipedia

  • dévitrification — [ devitrifikasjɔ̃ ] n. f. • 1803; de dévitrifier ♦ Techn. Action de dévitrifier; son résultat. ⊗ CONTR. Vitrification. ● dévitrification nom féminin Modification du verre sous l action prolongée de la chaleur, qui entraîne la cristallisation de… …   Encyclopédie Universelle

  • Devitrification — De*vit ri*fi*ca tion, n. The act or process of devitrifying, or the state of being devitrified. Specifically, the conversion of molten glassy matter into a stony mass by slow cooling, the result being the formation of crystallites, microbites,… …   The Collaborative International Dictionary of English

  • devitrification —  Devitrification  Расстекловывание   Процесс перехода стекла (некристаллическое или стекловидное твердое вещество) в кристаллическое твердое вещество. Для полимеров – переход из стеклообразного состояния в высокоэластическое …   Толковый англо-русский словарь по нанотехнологии. - М.

  • devitrification — See devitrifiable. * * * ▪ crystallography       process by which glassy (glass) substances change their structure into that of crystalline solids. Most glasses are silicates (compounds of silicon, oxygen, and metals) in which the atomic… …   Universalium

  • dévitrification — (dé vi tri fi ka sion) s. f. Terme de chimie. Action de dévitrifier ; résultat de cette action. •   La dévitrification n est autre chose qu une cristallisation, FOURNET Acad. des sc. Comptes rendus, t. LIII, p. 180 …   Dictionnaire de la Langue Française d'Émile Littré

  • devitrification — devitrifikacija statusas T sritis chemija apibrėžtis Medžiagos stikliškosios būsenos virtimas kristaline. atitikmenys: angl. devitrification rus. девитрификация; расстеклование …   Chemijos terminų aiškinamasis žodynas

  • devitrification — (|)dē+ noun Etymology: French dévitrification, from dévitrifier : the action or process of devitrifying or state of being devitrified; specifically : the conversion of glassy matter into crystalline (as by slow cooling or by pressure, action of… …   Useful english dictionary

  • devitrification — noun see devitrify …   New Collegiate Dictionary

  • devitrification — noun The formation of small crystals in a glass as a result of slow cooling from the molten state …   Wiktionary

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