microcline


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Related to microcline: sanidine, orthoclase

mi·cro·cline

 (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.
References in periodicals archive ?
Major pegmatites discovered at the Grants and BP33 are composed of coarse spodumene, quartz, albite, microcline, and mica.
The framework grains observed under polarizing microscope are monocrystalline and polycrystalline quartz, alkali feldspar, plagioclase, microcline, biotite, chert, muscovite and number of lithic fragments from distinct origins.
It is observed that the black cotton soil predominant with montmorillonite, quartz and microcline revealed new peaks pertaining to alunogen and bassanite due to contamination with sulfuric acid.
The density of the granite is 2620 kg/[m.sup.3], and the main components include microcline (41%), plagioclase (27%), quartz (22%), and biotite (7%), among others.
2[H.sub.2]O) Quartz (Si[O.sub.2]) Formation material: Albite (NaAl[Si.sub.3] (i) Normally found in the [O.sub.8]) Microcline (KAl[Si.sub.3] sandstone or sand [O.sub.8]) Cristoballite (Si[O.sub.2]) Illite Clay minerals normally found ([K.sub..5][(AlFeMg).sub.3] with sandstone [(SiAl).sub.4][O.sub.10] [(OH).sub.2]) Ettringite ([Ca.sub.6] Cementing material [Al.sub.2][(S[O.sub.4]) .sub.3][(OH).sub.12]) Barite (BaS[O.sub.4]) Drilling mud Aluminum Oxide ([Al.sub.2] Normally from catalyst [O.sub.3]) Sulfur (S) Sodium Iron Oxide (NaFe[O.sub.2]) Table 2: The description of the sludge samples investigated in this study.
The material of rupture (chamotte) is formed mainly of quartz and amorphous phase, with small amounts of hematite, microcline and anortithe (calcium feldspar).
Feldspars are mainly represented by microcline and albite, followed by orthoclase and sanidine in some samples (Table 1).
SA-11-36 Schmidt et Silcrete outcrops with trace Microcline and al.
The samples also contained a small amount of microcline (9%), calcite (9%), and clinochlore (8%).
In its natural condition, the main ingredients of this sandstone include calcium feldspar (73%), kaolinite (11.60%), quartz (10.48%), and microcline (4.50%); the physical and strength properties are provided in Table 1.
The low concentration of soluble [K.sub.2]O present in the phonolite may be due to the predominance of some constituent minerals such as: microcline (KAI[Si.sub.3][O.sub.8]), orthoclase (KAI[Si.sub.3][O.sub.8]), andesine [(Na,Ca)[(Si,Al).sub.4][O.sub.8]] and e nepheline [(Na, K) AlSi[O.sub.4]] (Teixeira et al., 2012), where K is retained by covalent bonds in the crystalline network of the mineral, presenting low K release to the soil solution (Martins et al., 2008).
It is a white-yellowish fine-grained granite with quartz (forming heterogranular aggregates), feldspars (with plagioclase > microcline) and muscovite, while biotite is absent (IGME, 1975).