microcline

mi·cro·cline

M0272100 (mī′krō-klīn′)n. A whitish gray, pink or green triclinic mineral of the potassium feldspar group that forms from relatively low-temperature magmas.

[German Mikroklin : mikro-, micro- (from the fact that its cleavage angle is not exactly equal to 90°) + Greek klīnein, to lean; see cline.]

microcline

(ˈmaɪkrəʊˌklaɪn) n (Minerals) a white, creamy yellow, red, or green mineral of the feldspar group, found in igneous, sedimentary, and metamorphic rocks: used in the manufacture of glass and ceramics. Composition: potassium aluminium silicate. Formula: KAlSi3O8. Crystal structure: triclinic[C19: from German Mikroklin, from mikro- micro- + Greek klinein to lean; so called because its cleavage plane is slightly different from 90°]

mi•cro•cline

(ˈmaɪ krəˌklaɪn)

n. a mineral of the feldspar group, potassium aluminum silicate, KAlSi₃O₈, chemically identical with orthoclase but differing in internal structure: used in making porcelain. [1840–50; micro- + -cline < Greek klinein to lean¹, referring to the angles between its cleavage planes, which differ slightly from 90°]

mi·cro·cline

(mī′krō-klīn′) A type of feldspar consisting of potassium aluminum silicate. Microcline is white, pink, red-brown, or green.

microcline

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.
..... Click the link for more information. .

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.

单词	microcline
释义	microcline mi·cro·cline M0272100 (mī′krō-klīn′)n. A whitish gray, pink or green triclinic mineral of the potassium feldspar group that forms from relatively low-temperature magmas. [German Mikroklin : mikro-, micro- (from the fact that its cleavage angle is not exactly equal to 90°) + Greek klīnein, to lean; see cline.] microcline (ˈmaɪkrəʊˌklaɪn) n (Minerals) a white, creamy yellow, red, or green mineral of the feldspar group, found in igneous, sedimentary, and metamorphic rocks: used in the manufacture of glass and ceramics. Composition: potassium aluminium silicate. Formula: KAlSi3O8. Crystal structure: triclinic[C19: from German Mikroklin, from mikro- micro- + Greek klinein to lean; so called because its cleavage plane is slightly different from 90°] mi•cro•cline (ˈmaɪ krəˌklaɪn) n. a mineral of the feldspar group, potassium aluminum silicate, KAlSi₃O₈, chemically identical with orthoclase but differing in internal structure: used in making porcelain. [1840–50; micro- + -cline < Greek klinein to lean¹, referring to the angles between its cleavage planes, which differ slightly from 90°] mi·cro·cline (mī′krō-klīn′) A type of feldspar consisting of potassium aluminum silicate. Microcline is white, pink, red-brown, or green. microcline 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. ..... Click the link for more information. . 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. ThesaurusSeefeldspar
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