andesine

American  

[an-duh-zeen] / ˈæn dəˌzin /

noun

1. a mineral, intermediate in the plagioclase feldspar group, having a play of colors and usually found as crystals in igneous rocks.

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andesine British  

/ ˈændɪˌziːn, -zɪn /

noun

1. a feldspar mineral of the plagioclase series consisting of an aluminium silicate of sodium and calcium. Formula: NaAlSi 3 O 8 .CaAl 2 Si 2 O 8

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andesine Scientific  

/ ăn′də-zēn′ /

1. 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) ₄ O ₈ .

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Etymology

Origin of andesine

1860–65; named after Andes; see -ine ²

Example Sentences

Oligoclase, or soda-lime feldspar, in which soda is present in much larger proportion than lime, and of which mineral andesite are andesine, is considered to be a variety.

From The Student's Elements of Geology by Lyell, Charles, Sir

These intermediate members are the lime-soda felspars known as oligoclase, andesine, labradorite and bytownite.

From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 2 "Fairbanks, Erastus" to "Fens" by Various