nepheline

American  

[nef-uh-lin] / ˈnɛf ə lɪn /

Also nephelite

noun

1. a feldspathoid mineral, essentially sodium aluminum silicate, NaAlSiO 4 , occurring in alkali-rich volcanic rocks.

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nepheline British  

/ ˈnɛfɪlɪn, ˈnɛfɪˌlaɪt, -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) 2 O 4

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Etymology

Origin of nepheline

1805–15; < French néphéline, equivalent to néphél- (< Greek nephélē cloud) + -ine -ine ²

Example Sentences

See Examples For:

nepheline

The flows from Kibo include nepheline and leucite basanite lavas rich in soda felspars.

From Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" by Various

Most nepheline basalts are fine grained, very dark coloured rocks, and belong to the Tertiary period.

From Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" by Various

In Finland, melanite-bearing nepheline rocks have been found and described as Ijolite, but the only other locality for melanite-leucite-syenite is Magnet Cove in Arkansas.

From Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3 "Borgia, Lucrezia" to "Bradford, John" by Various

Scheerer on the identity of eleolite and nepheline, 253.

From COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1 by Humboldt, Alexander von

The facial development of crystals of nepheline give no indication of this type of symmetry, and the mineral has been referred to this class solely on the evidence afforded by the etched figures.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" by Various