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 periodicals archive ?
Declining Rb and Ba in evolving, alkaline Hawaiian rocks has been ascribed to feldspar precipitation (West et al., 1988) because both elements have high partition coefficients in K-feldspars (e.g., sanidine).
Analyses using a polarizing light microscope aids in identification of cellulose and various minerals such as quartz and feldspar. Taphonomy and composition of the sediments permit a qualitative assessment of the environmental conditions and changes over time in the area.
In 1998, Chinese dealers offered the mineral market's first specimens of beautiful red Chinese garnet crystals associated with smoky quartz and feldspar. The locality repeatedly cited was the city of Lechang in the north of Guangdong Province, close to the border with Hunan.
Feldspar grains that have a honeycomb-like texture in porous conglomerate reservoirs usually contain significant dissolution pores (Figures 6(a), 8(a), 8(b), 9(a), 9(d), and 9(f)); these grains also display selective dissolution, where orthoclase is dissolved (Figures 8(b), 9(a), and 9(d)) but albite remains stable (Figure 8(a)) [30].
Hakro [8] reported the sediments of Bara Formation from Ranikot area are composed of quartz (low), hematite, potash feldspar, gypsum and goethite minerals.
Centrex Metals will use the technology at its Oxley potash project to become the first commercial and cost competitive manufacturer of bulk potassium chloride fertilizer from potassium feldspar ore.
At this point, you will almost certainly look at clouds and think, not just of water but also of the potassium-laden feldspar from Saharan dust and of other ice nuclei.
25 August 2016 - Dutch specialty metals and mineral products company AMG Advanced Metallurgical Group N.V.'s (EURONEXT AMSTERDAM: AMG) AMG MineraA[section sign]A[pounds sterling]o subsidiary has acquired the remaining 49.9% interest in their unincorporated feldspar partnership from Colorminas, Brazil, the company said.
M2 EQUITYBITES-August 25, 2016-AMG Advanced Metallurgical Buys Remaining 49.9% Stake in Feldspar Partnership
Quartz and Feldspar: Dartmoor--A British Landscape in Modern Times.
They consist of marble blocks and plates, ceramic bricks and roof tiles, feldspar, etc.
Technavio's analysts forecast the global feldspar market to grow at a CAGR of 4.04% over the period 2014-2019.