Definition of feldspathoid in English:

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feldspathoid

Pronunciation: /ˈfɛl(d)spəˌθɔɪd/

noun

Geology
Any of a group of minerals chemically similar to feldspar but containing less silica, such as nepheline and leucite.
Example sentences
  • The three commonest feldspathoids are leucite, nepheline, and sodalite.
  • Afghanite occurs as small, typically colorless transparent crystals associated with a wide variety of feldspathoids in volcanic ejecta collected in the general Mount Vesuvius area, Italy.
  • The change from incompatible to compatible behavior heralds the onset of significant plagioclase (or feldspathoid) precipitation/removal.

Derivatives

feldspathoidal

Pronunciation: /fɛl(d)spəˌˈθɔɪd(ə)l/
adjective
Example sentences
  • Salic magmas ranged widely from silicic to feldspathoidal and from peraluminous to peralkaline.
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