1 "Ficheiro:EB1911_Crystallography_-_Fig_92_Nepheline.svg".

Ficheiro:EB1911 Crystallography - Fig 92 Nepheline.svg

DescriptionEB1911 Crystallography - Fig 92 Nepheline.svg English: Etched figures on a hexagonal prism of nepheline. Date 12 January 2019 Source Own work...

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