sodium-calcium feldspar

См. также в других словарях:

• feldspar — noun Etymology: modification of obsolete German Feldspath (now Feldspat), from German Feld field + obsolete German Spath (now Spat) spar Date: 1772 any of a group of crystalline minerals that consist of aluminum silicates with either potassium,… …   New Collegiate Dictionary

• feldspar — [feld′spär΄] n. [altered < Ger feldspath (now feldspat) < feld, FIELD + spath, spar < IE base * spe , long, flat board > SPOON, SPADE1] any of several light colored, hard, glassy, monoclinic or triclinic minerals made up of aluminum… …   English World dictionary

• feldspar — /feld spahr , fel /, n. any of a group of minerals, principally aluminosilicates of potassium, sodium, and calcium, characterized by two cleavages at nearly right angles: one of the most important constituents of igneous rocks. Also, felspar.… …   Universalium

• Sodium — This article is about the chemical element. For the PlayStation Home game, see Sodium (PlayStation Home). neon ← sodium → magnesium Li ↑ Na ↓ K …   Wikipedia

• feldspar — noun Any of a large group of rock forming minerals that, together, make up about 60% of the earths outer crust. The feldspars are all aluminum silicates of the alkali metals sodium, potassium, calcium and barium. Feldspars are the principal… …   Wiktionary

• feldspar —   the generic name for a group of minerals made up of aluminium silicate along with calcium, potassium or sodium. A component of granite …   Geography glossary

• feldspar — feld•spar [[t]ˈfɛldˌspɑr, ˈfɛl [/t]] also felspar n. mir any of a group of crystalline minerals, principally aluminosilicates of potassium, sodium, and calcium, characterized by two cleavages at nearly right angles: one of the most important… …   From formal English to slang

• feldspar — n. (also felspar) Mineral. any of a group of aluminium silicates of potassium, sodium, or calcium, which are the most abundant minerals in the earth s crust. Derivatives: feldspathic adj. feldspathoid n. Etymology: G Feldspat, spath f. Feld FIELD …   Useful english dictionary

• alkali feldspar — noun : feldspar containing alkali metals (as sodium or potassium or both) but little calcium …   Useful english dictionary

• 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

• mineral deposit — Introduction       aggregate of a mineral in an unusually high concentration.       About half of the known chemical elements (chemical element) possess some metallic (metal) properties. The term metal, however, is reserved for those chemical… …   Universalium