. "stable"@en . . "MCNSY"@en . "Nepheline-microsyenite - A foid-microsyenite in which the dominant feldspathoid mineral is nepheline. It is the medium-grained equivalent of nepheline-syenite. British Geological Survey Research Report RR/99/06, section 5.1."@en . "Nepheline-microsyenite"@en . . "Nepheline-microsyenite"@en . . .