> as lemmas

1913 Mineral. Mag. 16 367 Natrodavyne... Hexagonal crystals, rich in faces, hitherto referred to nepheline or to davyne.

1963 Canad. Mineralogist 7 632 Dry material of the natrodavyne composition was prepared by mixing α-cristobalite, γ-alumina and Na₂SiO₃ in the correct stoichiometric proportions for the formation of nepheline, and then adding the required weight of anhydrous Na₂CO₃.

1996 Mineral. Rec. 27 109 Afghanite is a member of the cancrinite group first described in 1968 as a new species from the Sar-e-Sang lazurite deposit in Afghanistan. However, specimens of the mineral were first collected more than a century earlier from the Mount Vesuvius area. The material was partially described and named ‘natrodavyne’ in 1910, but was then lost until being recently re-identified.