- potassium melilite
- Силикатное производство: калиевый мелилит
Универсальный англо-русский словарь. Академик.ру. 2011.
potassium melilite
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Leucite — is a rock forming mineral composed of potassium and aluminium tectosilicate K [AlSi2O6] . Crystals have the form of cubic icositetrahedra but, as first observed by Sir David Brewster in 1821, they are not optically isotropic, and are therefore… … Wikipedia
Lamprophyre — Lamprophyres (Greek λαµπρός (lamprós) = bright and φύρω (phýro) = to mix) are uncommon, small volume ultrapotassic igneous rocks primarily occurring as dikes, lopoliths, laccoliths, stocks and small intrusions. They are alkaline silica… … Wikipedia
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
igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary … Universalium
Pilot Knob (Austin, Texas) — Pilot Knob is a hill that is part of an extinct volcano located seven miles south of central Austin, Texas near Austin Bergstrom International Airport and McKinney Falls State Park.IntroductionPilot Knob is one of around 75 late Cretaceous Period … Wikipedia
SILICATES — Les silicates et les différentes formes de silice qui s’y rattachent ont une importante industrielle et géochimique considérable. Ces minéraux, matières premières des industries du bâtiment, de la verrerie, de la céramique, et constituants des… … Encyclopédie Universelle
Lamproite — Lamproites are ultrapotassic mantle derived volcanic rocks. They have low CaO, Al2O3, Na2O, high K2O/Al2O3, a relatively high MgO content and extreme enrichment in incompatible elements.Lamproites are geographically widespread yet are… … Wikipedia
Silicate — Un silicate est un sel dérivant de la silice (SiO2). En chimie, ce sont des composés chimiques. En minéralogie, les silicates désignent une importante famille de minéraux. Les silicates constituent 97 % de la croûte terrestre. Il en existe… … Wikipédia en Français
Silicates — Silicate Un silicate est un sel dérivant de la silice (SiO2). En chimie, ce sont des composés chimiques. En minéralogie, les silicates désignent une importante famille de minéraux. Les silicates constituent 97 % de la croûte terrestre. Il en … Wikipédia en Français
feldspathoid — /feld spa thoyd , fel /, Mineral. adj. 1. Also, feldspathoidal. of or pertaining to a group of minerals similar in chemical composition to certain feldspars except for a lower silica content. n. 2. a mineral of this group, as nepheline. [1895… … Universalium
Geology of Tasmania — Tasmania has a varied geological history, with the world s biggest exposure of diabase, or dolerite. Rocks from the Neoproterozoic, Paleozoic and Mesozoic time periods appear. It is one of the few southern hemisphere areas glaciated during the… … Wikipedia
