Is nepheline syenite a flux?
Nepheline Syenite A-270 Like feldspar, Nepheline Syenite is used as a flux in porcelains, vitreous and semi-vitreous clay bodies, and in glazes. Nepheline syenite contributes high alumina without associated free silica in its raw form. This makes it an excellent tile filler and melter, especially for fast firing.
What is nepheline syenite in paint?
Nepheline syenite is a micronized functional filler and extender used as a performance enhancer in a broad range of paints, coatings, adhesives, sealants, and inks. Improved color, sheen uniformity, chemical and stain resistance, and durability result when it is used in interior paint formulations.
What is nepheline used for?
Like feldspar, nepheline syenite is used as a flux in tile, sanitary ware, porcelain, vitreous and semi-vitreous bodies. It contributes high alumina without associated free silica in its raw form and fluxes to form silicates with free silica in bodies without contributing free silica itself.
Where is nepheline most commonly found?
Nepheline only forms in silica-poor rocks. It is almost never associated with quartz. It may be found in some contact metamorphosed rocks otherwise it occurs in alkaline complexes in igneous rocks. Nepheline is mostly found in the rock Nepheline Syenite in nature.
Which type of Lustre is exhibited by nepheline?
vitreous lustre
Nepheline is an important feldspathoid mineral. It is white, grey or yellow in colour with a vitreous lustre and a poor cleavage.
How is syenite formed?
Syenites are products of alkaline igneous activity, generally formed in thick continental crustal areas, or in Cordilleran subduction zones. To produce a syenite, it is necessary to melt a granitic or igneous protolith to a fairly low degree of partial melting.
What can nepheline be used for?
What minerals are in nepheline syenite?
Nepheline syenite is a white to light grey medium-grained IGNEOUS ROCK. It consists mostly of soda feldspar, nepheline and potash feldspar, accessory magnesium and iron-rich minerals.