mica — micalike, adj. /muy keuh/, n. any member of a group of minerals, hydrous silicates of aluminum with other bases, chiefly potassium, magnesium, iron, and lithium, that separate readily into thin, tough, often transparent, and usually elastic… … Universalium
mica — mi•ca [[t]ˈmaɪ kə[/t]] n. mir any member of a group of minerals, hydrous silicates of aluminum usu. with potassium, sodium, or calcium, that separate readily into thin, tough, often transparent laminae • Etymology: 1700–10; < L mīca crumb,… … From formal English to slang
mica — /ˈmaɪkə / (say muykuh) noun any member of a group of minerals, hydrous disilicates of aluminium with other bases, chiefly potassium, magnesium, iron, and lithium, that separate readily (by cleavage) into thin, tough, often transparent, and… …
mica — noun /ˈmaɪkə/ Any of a group of hydrous aluminosilicate minerals characterized by highly perfect cleavage, so that they readily separate into very thin leaves, more or less elastic … Wiktionary
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
metamorphic rock — Any of a class of rocks that result from the alteration of preexisting rocks in response to changing geological conditions, including variations in temperature, pressure, and mechanical stress. The preexisting rocks may be igneous, sedimentary,… … Universalium
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
silica mineral — Any of the forms of silicon dioxide (SiO2), including quartz, tridymite, cristobalite, coesite, stishovite, melanophlogite, lechatelierite, and chalcedony. Various kinds of silica minerals have been produced synthetically. * * * Introduction… … Universalium
Groupe des chlorites — Pour les articles homonymes, voir chlorite (homonymie). Groupe des chlorites Catégorie IX : silicates[1] … Wikipédia en Français
Metasomatism — is the chemical alteration of a rock by hydrothermal and other fluids. Metasomatism can occur via the action of hydrothermal fluids from an igneous or metamorphic source. Metasomatic albite + hornblende + tourmaline alteration of metamorphosed… … Wikipedia
