microcline

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Related to Potassium aluminum silicate: Magnesium Aluminum Silicate

microcline:

see feldsparfeldspar
or felspar
, an abundant group of rock-forming minerals which constitute 60% of the earth's crust. Chemically the feldspars are silicates of aluminum, containing sodium, potassium, iron, calcium, or barium or combinations of these elements.
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Microcline

 

a mineral of the feldspar group. It is a triclinic K-Na feldspar with the chemical composition (K, NaXAlSiaOg]; it contains negligible quantities of Ca, Ba, Fe, Rb, and Cs. Microcline often forms perthites, which are microclines with small albite intergrowths. It occurs as individual grains, grain aggregates, prismatic crystals, or single crystals with a volume up to several m3. The mineral has a hardness of 6–6.5 on Mohs’ scale and a density of 2,540–2,570 kg/m3. It may be pink, brownish yellow, reddish white, or pinkish red; less frequently it is white or bluish green (amazonite, or amazonstone). Microcline has a vitreous or pearly luster. A thin section of the mineral under the microscope shows multiple twins, forming the characteristic microclinic grating structure.

Microcline is a typical rock-forming mineral contained in granite, granodiorite (syenite), pegmatite, and gneiss. It is the primary raw material used by the ceramics industry (porcelain, glazed pottery, and industrial ceramics). Amazonite is used as an ornamental stone.

WORKS

Kostov, I. Mineralogiia. Moscow, 1971. (Translated from English.)

microcline

[′mī·krə‚klīn]
(mineralogy)
KAlSi3O8 A triclinic potassium-rich feldspar, usually containing minor amounts of sodium; may be clear, white, pale-yellow, brick-red, or green, and is generally characterized by crosshatch twinning.
References in periodicals archive ?
Request for sample copy of this report https://www.marketresearchhub.com/enquiry.php?type=S&repid=2463479 Moonstone is a sodium potassium aluminum silicate with the chemical formula (Na,K)AlSi3O8 and belongs to the feldspar group.
The Sherwin-Williams Company has been granted a patent for a water-based coating composition comprising at least one tannin blocking latex resin; microspheres having a maximum pigment loading of at least 50%, the microspheres being selected from the group consisting of expanded acrylonitrile/vinylidene chloride copolymer particles, sodium potassium aluminum silicate particles, polyvinylidene chloride copolymer particles coated with calcium carbonate, ceramic particles, glass particles and polyethylene particles; and a reactive pigment.