| Cooper, M. A., Abdu, Y. A., Ball, N. A., Cerny, P., Hawthorne, F. C., Kristiansen, R. (2012) Aspedamite, ideally ◻12(Fe3+,Fe2+)3Nb4[Th(Nb,Fe3+)12O42]{(H2O),(OH)}12, a new heteropolyniobate mineral species from the Herrebøkasa Quarry, Aspedammen, Østfold, southern Norway: description and crystal structure. The Canadian Mineralogist, 50 (4) 793-894 doi:10.3749/canmin.50.4.793 |