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, -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

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Example Sentences

See Examples For:

nepheline

Composite rocks are definite associations of certain crytonostic, simple minerals, as feldspar, mica, solid silex, augite, and nepheline.

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

Typical nepheline-dolerites are scarce, and consist of idiomorphic augite, surrounded by nepheline.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 6 "Dodwell" to "Drama" by Various

These last consist of an intermixture of nepheline or sodalite and alkali-felspar.

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

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

Scheerer on the identity of eleolite and nepheline, 253.

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

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