See devitrifiable.

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      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 structure does not have the repetitive arrangement required for the formation of crystals. Glass is formed by the cooling of a rock magma too rapidly for this structural regularity to become established. Glasses typically are not stable at low temperatures, however, and a readjustment of the atomic arrangement may take place to form more stable structures. This devitrification process is very slow, but over millions of years, a glass will form a completely crystalline mass; thus, the occurrence of very old glassy rocks is rare.

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Universalium. 2010.

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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 — GLOSSARY OF VOLCANIC TERMS 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… …   Glossary of volcanic terms

  • 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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