Nepheline Syenite Norwegian

Alternate Names: North Cape Nepheline Syenite, Spectrum N500

Description: Norwegian Nepheline Syenite

Oxide	Analysis	Formula
K2O	8.80%	0.41
SiO2	57.20%	4.22
Al2O3	24.40%	1.06
Na2O	8.20%	0.59
Fe2O3	0.10%	-
TiO2	0.10%	0.01
LOI	1.00%	n/a
Oxide Weight		437.80
Formula Weight		442.22

Notes

North Cape nepheline syenite is produced in the north of Norway, near the Alta fjord within the Arctic circle. This has a much higher K₂O (and lower Na₂O) than the Canadian material.

The analysis on the Sibelco data page likely has an error in the SiO₂, we have changed it from 53.2 to 57.2.

May 2025: The Norwegian NS45 appears to be no longer available. They have substituted a new series, apparently mined in Sweden but processed in Thailand. The chemistry is very similar (56% SiO₂, 24% Al₂O₃, 8% Na₂O, 9% K₂O, 2% CaO, 0.1% Fe₂O₃).

Related Information

Links

Materials	Feldspar In ceramics, feldspars are used in glazes and clay bodies. They vitrify stonewares and porcelains. They supply KNaO flux to glazes to help them melt.
Materials	Nepheline Syenite
Typecodes	Feldspar The most common source of fluxes for high and medium temperature glazes and bodies.
Typecodes	Materials used in Denmark
Hazards	Feldspar Feldspars are abundant and varied in nature. They contain small amounts of quartz (while nepheline syenite does not).
URLs	http://en.wikipedia.org/wiki/Nepheline Nepheline at Wikipedia
URLs	http://www.handbookofmineralogy.org/pdfs/Nepheline.pdf Nepheline mineralogy
URLs	https://www.sibelco.com/en/materials/nepheline-syenite Sibelco Nepheline Syenite page They claim their nepheline syenite is a quartz-free aluminium silicate. It primarily comprises nepheline, microcline and albite. Because of its extremely low melting point and high alumina content, Sibelco nepheline syenite is used as a flux in ceramics, to lower melting temperatures in glass, and as a functional filler in coatings and polymers.
URLs	https://digitalfire.com/4sight/datasheets/NephelineSDataSheet.pdf Sibelco Nepheline S Thailand Data Sheet This is mined in Sweden and processed in Thailand. It is the successor to Norwegian Nepheline.

By Tony Hansen
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