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anorthite

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anorthite (ănôr`thīt): see feldspar feldspar 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
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anorthite

Feldspar mineral, calcium aluminosilicate (CaAl2Si2O8), that occurs as white or grayish, brittle, glassy crystals. Primarily a rock-forming mineral, it is used in the manufacture of glass and ceramics. Anorthite occurs in basic igneous rocks (see acid and basic rocks).

anorthite [ə′nȯr‚thīt]
(mineralogy)
The white, grayish, or reddish calcium-rich end member of the plagioclase feldspar series; composition ranges from Ab10An90to Ab0An100, where Ab = NaAlSi3O8and An = CaAl2Si2O8. Also known as calciclase; calcium feldspar.
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8]) that show continuous solid solution from albite to anorthite, with CaAl replacing NaSi as the series progresses.
Chemical analysis of World Trade Center fine particulate matter for ... by Gavett, Stephen H. / Environmental Health Perspectives
25x) PHOTO : CL micrograph of a buildup sample showing anorthite (yellow), corundum (red) and hercynite (black) crystals.
A study of throat clogging in the channel furnace by Williams, D.C. / Modern Casting
2000), plagioclase (mainly alkalic plagioclase of the anorthite type) appears to be a little more resistant to acid hydrolysis than orthoclase.
Podzolization in aeolian sands, underlain by gleysol formation, ... by Reintam, Loit; Raukas, Anto; Kleesment, Anne; Moora, Tanel; Kahrik, Raja / Proceedings of the Estonian Academy of Sciences: Geology
 
 
 
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