feldspar


Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.

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 periodicals archive ?
Digital images of rock slabs were analyzed to determine proportions of matrix and quartz and alkali feldspar phenocrysts.
It concerns the tiny pieces of shocked quartz and feldspar that have been considered evidence for the impact theory.
The Feldspar Market Review is an absolutely essential resource for anyone interested in detailed information on the reviewed market.
Under Filipino law, AEXE owns the maximum 40% interest of the mineral rights to 648 Hectares of feldspar mining properties and processing facility in Pasuquin, Ilocos Norte, in the Northern Philippines, logistically close to Taiwan and China.
8-9) The glazes with copper oxide (G1-CuO, G2-CuO) where glassware waste was added at a ratio of 20 percent instead of feldspar, shows different color and texture properties that classical copper green in standard glaze (STG-CuO).
One of the most complex pegmatites in the region was selected for study in order to investigate the genetic relationship of the dyke to the nearby alkali feldspar granite, to determine the internal evolution of the pegmatite, and to estimate the physical and chemical properties of the pegmatite-forming fluid.
The evidence for a continental impact, on the other hand, comes from the tiny bits of shocked quartz and feldspar in the layer.
LONDON -- The demand for feldspar is going east in its volume - the major demand driving regions are Asia and the Middle East.
Table 1: Global Feldspar Market (2007-2011): Production in
Cornwall Stone contains feldspar, quartz, kaolinite, mica and trace amounts of calcium fluoride.
This makes it sensitive to key geologic spectral "signatures' such as those of quartz and feldspar, which Christensen calls "the two most common rock-forming minerals,' and which have no corresponding spectral clues in the visible and near-infrared bands.
LONDON -- The global market for feldspar is reported to indicate rather significant trade volume growth.