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 ?
Euhedral to subhedral zoned oligoclase to andesine plagioclase (30% to 40%) and anhedral quartz (20% to 30%), in small pods, are the primary constituents of the rock.
The plagioclase microlites range in composition from andesine ([An.
Plagioclase is often replaced by alkali feldspar and varies in composition from andesine to oligoclase.