Definition of feldspathoid in English:

feldspathoid

Line breaks: feld|spath¦oid
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.
    More 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: /-ˈθɔɪd(ə)l/
adjective
More example sentences
  • Salic magmas ranged widely from silicic to feldspathoidal and from peraluminous to peralkaline.

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