feldspar


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feldspar

[feld′spär]
Etymology: Ger, feld, field, spath, spar
a crystalline mineral of aluminum silicate with potassium, sodium, barium, and calcium. It melts over a range of 593.5° C to 1093° C (1100° F to 2000° F) and is an important component of dental porcelain.

feldspar (feld´spär),

n a crystalline mineral of aluminum silicate with po-tassium, sodium, barium, or calcium– NaAlSi3O8 or KAlSi3O8. Feldspar melts over a range of 1,100°F to 2,000°F (593.5°C to 1093.5°C). An important constituent of dental porcelain.
feldspar, orthoclase ceramic,
n a clay found in large quantity in the solid crust of the earth. It acts as a filler and imparts body to the fused dental porcelain.
References in periodicals archive ?
Feldspar exports last year amounted to 427 tonnes compared to 54 tonnes in 2016.
11La(W)###Coarse###Angular-###Moderately###Grain###Ferruginous###Plagioclase, alkali Feldspar,
added, Science is thrilled to partner with Feldspar to scale their business and leverage our knowledge of growing digital audiences for content consumption.
AMG MineraA[section sign]A[pounds sterling]o's Mibra mine produces 300,000 pounds of high purity tantalum oxides (Ta2O5) in concentrates annually primarily for use in capacitors for the electronics industry and produces 180,000 tons of feldspar for the local ceramics and glass industry.
Technavio's report, Global Feldspar Market 2015-2019, has been prepared based on an in-depth market analysis with inputs from industry experts.
Potters represent less than 1/10 percent of one percent of the feldspar market, and economics do not favour a new feldspar being introduced solely or in part by only potters' demand for such a product.
Among the feldspars, K-feldspar grains predominated over alkaline ones, and orthoclase crystals over the microcline variety.
The present work evaluates adsorption potential of alkali feldspar towards Direct Red 16 (synthetic textile dye).
As a result, low corrosion of the grains has allowed a small size difference between quarts and feldspar because with more transportation and abrasions, feldspar grains would be smaller than quarts owing to lower durability of feldspar.
The location of the feldspar also provides an explanation for how granite could have formed on Mars.
The company produces silica sand, limestone, dolomite, chamotte and feldspar.
Crystals are small (<3 mm maximum diameter) and include rounded embayed quartz, subhedral K-feldspar (anorthoclase, based on the presence of fine-scale cross-hatch twinning), and subhedral plagioclase set in a locally spherulitic groundmass of cryptocrystalline quartz and feldspar.