devitrified

См. также в других словарях:

• Graphic texture — is commonly created by exsolution and devitrification and immiscibility processes in igneous rocks.It is called graphic because the exsolved or devitrified minerals form wriggly lines and shapes which are reminiscent of writing. Trachyte is a… …   Wikipedia

• perlite — perlitic /perr lit ik/, adj. /perr luyt/, n. Petrog. a volcanic glass in which concentric fractures impart a distinctive structure resembling masses of small spheroids, used as a plant growth medium. Also, pearlite. [1825 35; < F; see PEARL1,… …   Universalium

• 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

• Bentonite — is an absorbent aluminium phyllosilicate generally impure clay consisting mostly of montmorillonite. There are a few types of bentonites and their names depend on the dominant elements, such as K, Na, Ca, and Al. As noted in several places in the …   Wikipedia

• Spherulite — Spherulites, in petrology, are small, rounded bodies that commonly occur in vitreous igneous rocks. They are often visible in specimens of obsidian, pitchstone and rhyolite as globules about the size of millet seed or rice grain, with a duller… …   Wikipedia

• List of rock textures — This page is intended to be a list of rock textural and morphological terms. A * Adcumulate * Agglomeritic * Adamantine a type of lustre * Amygdaloidal * Anhedral * Antitaxial veins * Aphanitic * Aplitic; aplite * Augen textured gneiss *… …   Wikipedia

• Glass-ceramic-to-metal seals — Glass to metal seals have been around for many years, with one of the most common uses being lamp bulb seals. A more recent invention is glass ceramic to metal seals.Properties Glass ceramics are polycrystalline ceramic materials prepared by the… …   Wikipedia

• 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

• List of countries by bentonite production — Bentonite is an absorbent aluminium phyllosilicate generally impure clay consisting mostly of montmorillonite. There are a few types of bentonites and their names depend on the dominant elements, such as Potassium, sodium, calcium, and aluminum.… …   Wikipedia

• devitrify — devitrifiable, adj. devitrification, n. /dee vi treuh fuy /, v., devitrified, devitrifying. v.t. 1. Chem. to deprive, wholly or partly, of vitreous character or properties. v.i. 2. Petrol. (of a volcanic rock or particle) to undergo a change in… …   Universalium

• volcanic glass — a natural glass produced when molten lava cools very rapidly; obsidian. [1830 40] * * * Any glassy rock formed from lava or magma that has a chemical composition close to that of granite. Such molten material may reach very low temperatures… …   Universalium