Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A mineral of sodium-aluminum or potassium-aluminum silicate, occurring worldwide in igneous rocks and used in the manufacture of ceramics and enamels.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) A mineral occuring at Vesuvius, in glassy hexagonal crystals; also elsewhere, in grayish or greenish masses having a greasy luster, as the variety elæolite. It is a silicate of aluminia, soda, and potash.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy A
feldspathoid mineral ofsilica -poorigneous ,plutonic andvolcanic rocks . Chemically, nepheline is aplagioclase feldspar with insufficient silica to satisfy the chemical bonds. Because of the unfilled bonds, nephelineweathers rapidly and can only be seen as inclusions in freshly broken rock.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a whitish mineral consisting of sodium aluminum silicate or potassium aluminum silicate in crystalline form; used in the manufacture of ceramics and enamels
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
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Examples
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Canadian feldspar nepheline syenite is sometimes used to lower bisk firing temperatures.
European Lithographic | SciFi, Fantasy & Horror Collectibles 2009
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Kyrgyzstanabundant hydropower; significant deposits of gold and rare earth metals; locally exploitable coal, oil, and natural gas; other deposits of nepheline, mercury, bismuth, lead, and zinc
Natural resources 2008
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Natural resources: abundant hydropower; significant deposits of gold and rare earth metals; locally exploitable coal, oil, and natural gas; other deposits of nepheline, mercury, bismuth, lead, and zinc
Kyrgyzstan 2008
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High temperature (1100-1300°C) - primary flux: feldspar, nepheline syenite, fusible clay, wood ash.
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Once a feldspar has been shown to you, you will easily recognize feldspars on your own. nepheline syenite: Nepheline syenite resembles feldspar but contains less quartz; so its melting point is lower, and it can be used as a body flux at temperatures above 1060° C. Rocks containing nepheline occur widely.
Chapter 9 1990
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Commercial nepheline syenite has had its iron oxide removed by magnetic separation. glass powder: Ground glass is a cheap source of flux for both clay bodies and glazes.
Chapter 9 1990
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Additional flux can be feldspar (preferably nepheline syenite), lime - stone, dolomite, frit or glass powder.
Chapter 9 1990
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The flows from Kibo include nepheline and leucite basanite lavas rich in soda felspars.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" Various
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Natural resources: abundant hydroelectric potential; significant deposits of gold and rare earth metals; locally exploitable coal, oil and natural gas; other deposits of nepheline, mercury, bismuth, lead, and zinc
The 1995 CIA World Factbook United States. Central Intelligence Agency
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Natural resources: abundant hydroelectric potential; significant deposits of gold and rare earth metals; locally exploitable coal, oil, and natural gas; other deposits of nepheline, mercury, bismuth, lead, and zinc
The 1996 CIA Factbook United States. Central Intelligence Agency
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