mi·cro·cline

(mī′krō-klīn′)

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.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

microcline

(ˈmaɪkrəʊˌklaɪn)

(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°]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

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.

The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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References in periodicals archive

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.

FACIES ARCHITECTURE, PETROGRAPHIC AND GEOCHEMICAL ANALYSIS OF TOBRA FORMATION, SALT RANGE, PAKISTAN

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.

VOLUME CHANGE BEHAVIOR OF PHOSPHOGYPSUM TREATED CLAYEY SOILS CONTAMINATED WITH INORGANIC ACIDS A MICRO LEVEL STUDY

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.

Characterization of Sludge Deposits from Refineries and Gas Plants: Prerequisite Results Requirements to Facilitate Chemical Cleaning of the Particular Equipment

The material of rupture (chamotte) is formed mainly of quartz and amorphous phase, with small amounts of hematite, microcline and anortithe (calcium feldspar).

Influencia de las materias primas y de la tecnica de moldeo en la fabricacion de productos ceramicos tipo gres

Feldspars are mainly represented by microcline and albite, followed by orthoclase and sanidine in some samples (Table 1).

Organic geochemical study of the upper layer of Aleksinac oil shale in the Dubrava block, Serbia

SA-11-36 Schmidt et Silcrete outcrops with trace Microcline and al.

Analysis of thermally-induced transformations of silica rocks after high temperature heat treatment

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.

Effects of Heating Rate on the Dynamic Tensile Mechanical Properties of Coal Sandstone during Thermal Treatment

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).

Potassium solubilization in phonolite rock by diazotrophic bacteria

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).

Assessing the weathering of granitic stones on historical urban buildings by geochemical indices