anorthite


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Related to anorthite: labradorite

anorthite

(ănôr`thīt): 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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anorthite

[ə′nȯr‚thīt]
(mineralogy)
The white, grayish, or reddish calcium-rich end member of the plagioclase feldspar series; composition ranges from Ab10 An90 to Ab0 An100, where Ab = NaAlSi3O8 and An = CaAl2Si2O8. Also known as calciclase; calcium feldspar.
References in periodicals archive ?
It was found that in samples of tiles of basalt containing mass are present crystals of augite, quartz, anorthite and a small amount of hematite.
The rational combination of components of basalt containing masses ensures the presence in the structure along with anorthite, hematite and quartz crystal phase clinopyroxene--augite, which due to its crystal-chemical features, namely the chain of structural motif, high hardness and density make the structure of the ceramic tiles harder, providing a greater degree of crystallinity.
PHOTO : CL micrograph of anorthite fibers (yellow) and corundum (red) crystals.
producing compositional and textural zonation: anorthite to albite transformation was faster than growing and crystallization, originating normal-zoned crystals.