Definition of Feldspars. Meaning of Feldspars. Synonyms of Feldspars

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Definition of Feldspars

Feldspar
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. They occur in crystals and crystalline masses, vitreous in luster, and breaking rather easily in two directions at right angles to each other, or nearly so. The colors are usually white or nearly white, flesh-red, bluish, or greenish. Note: The group includes the monoclinic (orthoclastic) species orthoclase or common potash feldspar, and the rare hyalophane or baryta feldspar; also the triclinic species (called in general plagioclase) microcline, like orthoclase a potash feldspar; anorthite or lime feldspar; albite or soda feldspar; also intermediate between the last two species, labradorite, andesine, oligoclase, containing both lime and soda in varying amounts. The feldspars are essential constituents of nearly all crystalline rocks, as granite, gneiss, mica, slate, most kinds of basalt and trachyte, etc. The decomposition of feldspar has yielded a large part of the clay of the soil, also the mineral kaolin, an essential material in the making of fine pottery. Common feldspar is itself largely used for the same purpose.

Meaning of Feldspars from wikipedia

- common members of the feldspar group are the plagioclase (sodium-calcium) feldspars and the alkali (pot****ium-sodium) feldspars. Feldspars make up about 60%...
- Pot****ium feldspar refers to a number of minerals in the feldspar group, and containing pot****ium: Orthoclase (endmember formula KAlSi3O8), an important...
- remaining orthoclase with pot****ium. The resulting intergrowth of the two feldspars is called perthite. The higher-temperature polymorph of KAlSi3O8 is sanidine...
- Feldspar is a group of rock-forming minerals, including: Alkali feldspar Alkali feldspar granite Pot****ium feldspar Feldspar may also refer to: A community...
- Alkali feldspar granite, some varieties of which are called 'red granite', is a felsic igneous rock and a type of granite rich in the mineral pot****ium...
- anorthite (%An) or albite (%Ab). There are several named plagioclase feldspars that fall between albite and anorthite in the series. The following table...
- co****-grained quartz and feldspars in varying proportions. These rocks are classified by the relative percentages of quartz, alkali feldspar, and plagioclase...
- consists of regular exsolution layers (lamellae) of different alkali feldspars (orthoclase and sodium-rich plagioclase). Polished moonstones often display...
- Feldspar is an album by saxophonist and composer Matana Roberts, electric guitarist Sam Shalabi, and double b****ist Nicolas Caloia. Consisting of seven...
- USS Feldspar (IX-159), a Trefoil-class concrete barge designated an unclassified miscellaneous vessel, was the only ship of the United States Navy to be...