feldspars

   A very common group of rock forming minerals [16].

A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. . 2002.

Look at other dictionaries:

  • feldspars — feldšpatai statusas T sritis chemija apibrėžtis Silikatų klasės mineralų grupė. atitikmenys: angl. feldspars rus. полевые шпаты; фельдшпаты ryšiai: sinonimas – putnagai sinonimas – lauko špatai …   Chemijos terminų aiškinamasis žodynas

  • feldspars — Смотри Шпаты полевые …   Энциклопедический словарь по металлургии

  • feldspars — feld·spar || feldspÉ‘r / spɑː n. any of a group of alumino silicates (Mineralogy) …   English contemporary dictionary

  • Some typical occurrences of the rock-forming feldspars — ▪ Table Some typical occurrences of the rock forming feldspars Potassium feldspars* sanidine potassium rich volcanic rocks and near surface minor intrusions e.g., rhyolites, trachytes, and high temperature contact metamorphic rocks orthoclase… …   Universalium

  • Шпаты полевые — [feldspars] группа силикатов (алюмосиликаты Na, Ca, К, Ва) с непрерывными трехмерными каркасами из тетраэдров (Si, Al)O4, наиболее распространенные в земной коре (до 60 мас., %). Шпаты полевые имеют стеклянный блеск, среднюю спайность,… …   Энциклопедический словарь по металлургии

  • 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

  • Feldspar — is the name of a group of rock forming minerals which make up as much as 60% of the Earth s crust.Feldspar. [http://www.ima na.org/about industrial minerals/feldspar.asp What is Feldspar?] Industrial Minerals Association. Retrieved on July 18… …   Wikipedia

  • 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

  • Clastic rock — A thin section of a clast (sand grain), derived from a basalt score. Vesicles (air bubbles) can be seen throughout the clast. Plane light above, cross polarized light below. Scale box is 0.25 mm Clastic rocks are composed of fragments, or clasts …   Wikipedia

  • alkali feldspar — Any of several common silicate minerals that often occur as whitish to variously coloured, glassy crystals. The alkali feldspars may be regarded as mixtures of sodium aluminosilicate (NaAlSi3O8) and potassium aluminosilicate (KAlSi3O8). Both the… …   Universalium

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.