Nepheline-syenite pegmatites.
References:
Brøgger, W.C. (1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit-und Nephelinsyenite. Zeitschrift für Kristallographie und Mineral.16. 663 pp
Mineral List:20 entries listed. 18 valid minerals.
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