|Monthly Tech-Tip |
Alternate Names: North Cape Nepheline Syenite, Spectrum N500
Description: Norwegian Nepheline Syenite
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.
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.
The most common source of fluxes for high and medium temperature glazes and bodies.
Materials used in Denmark
Feldspars are abundant and varied in nature. They contain small amounts of quartz (while nepheline syenite does not).
|By Tony Hansen|
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