andesine

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English[edit]

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Etymology[edit]

Named for the type locality in the Andes Mountains.

Noun[edit]

andesine (uncountable)

  1. (mineralogy) Sodium calcium aluminum silicate, (Na_xCa_xAlSi_3O_8), a plagioclase feldspar, the third member of the albite-anorthite solid solution series. Found in fine-grained andesite lavas; crystals are rarely seen.

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