Andesine
a mineral, intermediate in the plagioclase feldspar group, having a play of colors and usually found as crystals in igneous rocks.
historical examples
these intermediate members are the lime-soda felspars known as oligoclase, andesine, labradorite and bytownite.
encyclopaedia britannica, 11th edition, volume 10, slice 2 various
noun
a feldspar mineral of the plagioclase series consisting of an aluminium silicate of sodium and calcium. formula: naalsi3o8.caal2si2o8
andesine
(ān’də-zēn’)
a white, gray, green or yellow mineral of the plagioclase feldspar group. andesine occurs in igneous rocks such as andesite and diorite. chemical formula: (na,ca)(si,al)4o8.
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