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albite |
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albite (ăl`bīt): see feldspar feldspar (fĕl`spär, fĕld`–) or felspar ..... Click the link for more information. . albiteCommon feldspar mineral, a sodium aluminosilicate (NaAlSi3O8) that occurs most widely in pegmatites and acid igneous rocks such as granites. It may also be found in low-grade metamorphic rocks (those formed under relatively low temperature and pressure conditions) and in certain sedimentary rocks. Albite usually forms brittle, glassy crystals that may be colourless, white, yellow, pink, green, or black. It is used in the manufacture of glass and ceramics, but its primary geologic importance is as a rock-forming mineral. albite [′al‚bīt] (mineralogy) NaAlSi3O8A 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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| ? Mentioned in | ? References in periodicals archive | |
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The "black shale"
category is typified by the Colombian deposits where emerald occurs in
calcite + dolomite + pyrite [+ or -] albite veins in black shales and
related rocks. 8]) that show continuous
solid solution from albite to anorthite, with CaAl replacing NaSi as the
series progresses. As to
the rarity of sodium in meteorites, they do contain traces of albite, a
feldspar which contains sodium. |
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