- a feldspathoid mineral, essentially sodium aluminum silicate, NaAlSiO4, occurring in alkali-rich volcanic rocks.
Also neph·e·lite [nef-uh-lahyt] /ˈnɛf əˌlaɪt/.
Origin of nepheline
1805–15; < French néphéline, equivalent to néphél- (< Greek nephélē cloud) + -ine -ine2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for nepheline
The pyroxene is morphic, yellow or green, and is surrounded by formless areas of nepheline.
These last consist of an intermixture of nepheline or sodalite and alkali-felspar.
Nepheline appears to decrease in amount as leucite increases.
Sodalite or hauyne may also be present, but nepheline is typically absent.
Some writers held that this mineral has resulted from the decomposition of nepheline; others regard it as a primary mineral.
- 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) 2 O 4
C19: from French néphéline, from Greek nephelē cloud, so called because pieces of it become cloudy if dipped in nitric acid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012