andesine


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an·de·sine

 (ăn′də-zēn′)
n.
A white, gray, green, or yellow variety of plagioclase feldspar that contains approximately equal proportions of sodium and calcium and occurs in igneous rocks of intermediate silica content, such as andesite and diorite.

andesine

(ˈændɪˌziːn; -zɪn)
n
(Minerals) a feldspar mineral of the plagioclase series consisting of an aluminium silicate of sodium and calcium. Formula: NaAlSi3O8.CaAl2Si2O8
[C19: from the Andes (where it is found) + -ine1]
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References in periodicals archive ?
The plagioclase is commonly zoned, at places oscillatory, with much altered cores containing white mica and zoisite granules, and ranges from sodic andesine to albite.
The plagioclase microlites range in composition from andesine ([An.
Generally, they are composed of andesine, hornblende, occasional biotite, with minor amounts of titanomagnetite, chromomagnetite and ilmenite.
Plagioclase is often replaced by alkali feldspar and varies in composition from andesine to oligoclase.
15 and that the granodiorite contains oligoclase (An = 23-28) and andesine (An = 30-36) plagioclase (Fig.
Plagioclase (calcic andesine to labradorite) is commonly zoned and occurs as phenocrysts and groundmass; in some the amphibole may also form phenocrysts.