albite

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albite

(ăl`bīt): 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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albite

[′al‚bīt]
(mineralogy)
NaAlSi3O8 A colorless or milky-white variety of plagioclase of the feldspar group found in granite and various igneous and metamorphic rocks. Also known as sodaclase; sodium feldspar; white feldspar; white schorl.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Here, the brecciated rocks are surrounded by scapolite-bearing schists and amphibolites (Figure 2(h)) or albite-dominated chlorite schists (Figure 4(e)) and carbonate-rich albitic felsites/schists (Figures 3(f)-3(g)).
The ductile formation of foliation in both the scapolite metagabbro and scapolite-bearing amphibolites at Atangen, following scapolite-cemented brecciation, and similar formation of foliated albitic felsites and chlorite schists at Langoy, illustrate that the deformation changed from brittle to ductile during metasomatism.
2e, f); (3) a penetrative micro-fabric in the albitic aplite zones (Fig.
As noted above, deformation of the pegmatite is manifested by thin shear bands within muscovite-rich zones, flattened quartz megacrysts, a penetrative fabric within albitic pegmatite, and kinked spodumene crystals.
Biotite-rich gneiss with quartz and up to 25% albitic plagioclase make up some of the metapelitic interbeds within the siliceous marble.
Compositions are more anorthitic in the southern plutons and become more albitic in the northern p]utons (Fig.
Like their host rocks, the sills show evidence for greenschist facies metamorphism, as indicated by the mineral assemblage chlorite, actinolite, epidote, and albitic plagioclase.