feldspar

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feld·spar

 (fĕld′spär′, fĕl′-) also fel·spar (fĕl′-)
n.
Any of a group of abundant rock-forming minerals occurring in igneous, metamorphic, and sedimentary rocks, and consisting of silicates of aluminum with potassium, sodium, calcium, and, rarely barium. About 60 percent of the earth's outer crust is composed of feldspar.

[Partial translation of obsolete German Feldspath : Feld, field (from Middle High German veld, from Old High German feld; see pelə- in Indo-European roots) + Spath, spar.]

feldspar

(ˈfɛldˌspɑː; ˈfɛlˌspɑː) or

felspar

n
(Minerals) any of a group of hard rock-forming minerals consisting of aluminium silicates of potassium, sodium, calcium, or barium: the principal constituents of igneous rocks. The group includes orthoclase, microcline, and the plagioclase minerals
[C18: from German feldspat(h), from feld field + spat(h) spar3]
feldspathic, felˈspathic, ˈfeldspathˌose, ˈfelspathˌose adj

feld•spar

(ˈfɛldˌspɑr, ˈfɛl-)

also felspar



n.
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 constituents of igneous rocks.
[1765–75; alter. of feldspath < German (Feld field + Spat(h) spar)]

feld·spar

(fĕld′spär′, fĕl′spär′)
Any of a group of abundant minerals consisting of silicates of aluminum with potassium, sodium, and calcium. Feldspars range from white, pink, or brown to grayish blue in color. They occur in igneous, sedimentary, and metamorphic rocks and make up more than 60 percent of the Earth's crust.

feldspar

Any of a group of minerals comprising aluminum silicates and a metal (calcium, potassium, or sodium).
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.feldspar - any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium
atomic number 14, Si, silicon - a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
orthoclase - a white or colored monoclinic feldspar
oligoclase, plagioclase - any of a series of triclinic feldspars that form rocks
moonstone - a transparent or translucent gemstone with a pearly luster; some specimens are orthoclase feldspar and others are plagioclase feldspar
spar - any of various nonmetallic minerals (calcite or feldspar) that are light in color and transparent or translucent and cleavable
Translations
maasälpä

feldspar

[ˈfeldspɑːʳ] Nfeldespato m
References in classic literature ?
It was composed of black and vitreous lava, mixed with fragments of felspar. And lastly, on the 10th of March, a smaller island, called Reka, showed itself near Nea Kamenni, and since then these three have joined together, forming but one and the same island."
Beudant [11] succeeded in making tubes, in most respects similar to these fulgurites, by passing very strong shocks of galvanism through finely-powdered glass: when salt was added, so as to increase its fusibility, the tubes were larger in every dimension, They failed both with powdered felspar and quartz.
Thus she contrives to intenerate the granite and felspar, takes the boar out and puts the lamb in and keeps her balance true.
Kaolin is a natural clay formed by the chemical weathering of aluminum silicate minerals such as felspars through a complex sequence of events.
Various potash felspars are available and in this formula comparing one to another the difference is insignificant.
Chinese porcelain was formed from various combinations of refractory white kaolins, felspars and other indigenous materials, fired at high temperatures in climbing kilns which European ceramic technology and kilns at that time could not achieve.
Felspars and quartz (silica) are giant grains in the multi plate-like structure of the clay body.
Felspars can typically run from one to 100 microns in size, with their shapes being irregular and blocky.
* The next step is to use the chosen kaolin and repeat the process above varying the felspars that are available, for example: potash, soda and China stone and so forth.
FELSPARS PLAY A CRITICAL ROLE IN MID-RANGE (cone 6, 2232[degrees]F) and high temperature (cone 9, 2300[degrees]F) clay body and glaze formulas, acting as a flux, helping to bring other materials into a vitreous melt.
I can emphasise with such research and for many years have used only the local kaolins, felspars, silicas and limestones from my surroundings in Gulgong, some hundreds of kilometres from the Southern Highlands where Steve Harrison practises.
The potential of technical ceramics in Nigeria had not being exploited to its optimum considering the availability of millions of tonnage of the ceramic materials (felspar, quartz, kaolin, talc, calcium carbonate, barites and tin oxide).