Nepheline



[nef-uh-lin] /ˈnɛf ə lɪn/

noun
1.
a feldspathoid mineral, essentially sodium aluminum silicate, NaAlSiO 4 , occurring in alkali-rich volcanic rocks.
/ˈnɛfɪlɪn; -ˌliːn/
noun
1.
a whitish mineral consisting of sodium potassium aluminium silicate in hexagonal crystalline form: used in the manufacture of glass and ceramics. Formula: (Na,K)(AlSi)2O4

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