- potash feldspar
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any of the feldspar minerals having the composition KAlSi3O8, as orthoclase.[1860-65]
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Universalium. 2010.
potash feldspar
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potash feldspar — any of the feldspar minerals having the composition KAlSi3O8, as orthoclase. [1860 65] * * * potash feldspar, = orthoclase. (Cf. ↑orthoclase) … Useful english dictionary
Feldspar — Feld spar , Feldspath Feld spath , n. [G. feldspath; feld field + spath spar.] (Min.) A name given to a group of minerals, closely related in crystalline form, and all silicates of alumina with either potash, soda, lime, or, in one case, baryta.… … The Collaborative International Dictionary of English
Feldspath — Feldspar Feld spar , Feldspath Feld spath , n. [G. feldspath; feld field + spath spar.] (Min.) A name given to a group of minerals, closely related in crystalline form, and all silicates of alumina with either potash, soda, lime, or, in one case … The Collaborative International Dictionary of English
potashfeldspar — potash feldspar n. See orthoclase. * * * … 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
sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… … Universalium
Geology of the Australian Capital Territory — Australia grew around three fused pieces of very ancient continental crust (cratons). The geology of the Australian Capital Territory includes rocks dating from the Ordovician around 480 million years ago, whilst most rocks are from the Silurian … Wikipedia
trachyte — trachytic /treuh kit ik/, trachytoid /trak i toyd , tray ki /, adj. /tray kuyt, trak uyt/, n. a fine grained volcanic rock consisting essentially of alkali feldspar and one or more subordinate minerals, as hornblende or mica: the extrusive… … Universalium
Holungen — Infobox Ort in Deutschland image photo = Wappen = Wappen Holungen.png lat deg = 51 |lat min = 29 |lat sec = 27 lon deg = 10 |lon min = 23 |lon sec = 36 Lageplan = Bundesland = Thüringen Landkreis = Eichsfeld Verwaltungsgemeinschaft = Eichsfeld… … Wikipedia
Trachyte — is an igneous, volcanic rock with an aphanitic to porphyritic texture. The mineral assemblage consists of essential alkali feldspar; relatively minor plagioclase and quartz or a feldspathoid such as nepheline may also be present. (See the QAPF… … Wikipedia
