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A quartz-free feldspathoid, nepheline syenite is commonly reported together with feldspars but has a number of advantages in industrial use. The high alumina content combined with a low melting ...

A quartz-free feldspathoid, nepheline syenite is commonly reported together with feldspars but has a number of advantages in industrial use. The high alumina content combined with a low melting point ...

Testwork is being carried out on nepheline syenite and aegirine to determine their mineralogy, chemical composition, and leachate chemistry. The results will support further assessment of the market ...

syenite or leucite syenite. (n.) Orig., a rock composed of quartz, hornblende, and feldspar, anciently quarried at Syene, in Upper Egypt, and now called granite. Syenite Meaning in Arabic: Searching ...