andesine

[ an-duh-zeen ]

noun

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

andesine

/ 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

andesine

/ 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 .

Word History and Origins

Origin of andesine¹

1860–65; named after Andes; -ine ²

Word History and Origins

Origin of andesine¹

C19: from the Andes (where it is found) + -ine ¹

Example Sentences

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

From Project Gutenberg

They consist in great part of feldspars, which vary in composition from anorthite to andesine, or from those kinds in which there is less than one per cent of potash and soda to those in which there is more than seven per cent of these alkalies, the soda preponderating greatly.

From Project Gutenberg

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 Project Gutenberg