Definitions | andesine |
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- (mineralogy) sodium calcium aluminum silicate, (<math>Na_xCa_xAlSi_3O_8</math>), a plagioclase feldspar, the third member of the albite-anorthite solid solution series. Found in fine-grained andesite lavas; crystals are rarely seen.
Etymology: Named for the type locality in the Andes Mountains.
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