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albite

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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.
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References in periodicals archive
The mineral composition is quartz, albitic plagioclase, chlorite, stilpnomelane, white mica, epidote-clinozoisite, ilmenite, pyrite, apatite and zircon.
The basal tectonic melange of the Cabo Ortegal Complex (NW Iberian Massif): a key unit in the suture of Pangea/La melange tectonica basal del Complejo de Cabo Ortegal (NW del Macizo Iberico): una unidad clave en la sutura de Pangea
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.
U-Pb tantalite, Re-Os molybdenite, and [sup.40]Ar/[sup.39]Ar muscovite dating of the Brazil Lake pegmatite, Nova Scotia: a possible shear-zone related origin for an LCT-type pegmatite
Biotite-rich gneiss with quartz and up to 25% albitic plagioclase make up some of the metapelitic interbeds within the siliceous marble.
Minimum age of the Neoproterozoic Seven Hundred Acre Island Formation and the tectonic setting of the Islesboro Formation, Islesboro block, Maine
Compositions are more anorthitic in the southern plutons and become more albitic in the northern p]utons (Fig.
Geochemistry of Early Devonian calc-alkaline plutons in the Merrimack belt: implications for Mid-Paleozoic terrane relationships in the New England Appalachians
Like their host rocks, the sills show evidence for greenschist facies metamorphism, as indicated by the mineral assemblage chlorite, actinolite, epidote, and albitic plagioclase.
Stratigraphy, structure, and mafic sills in a section through the Halifax Group, Black River area, Kings County, Nova Scotia. (Atlantic Universities Geological Conference 2000)
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