Citation: Yakovenchuk, V. N.; Ivanyuk, G. Y.; Pakhomovsky, Y. A.; Selivanova, E. A.; Mikhailova, J. A.; Krivovichev, S. V.; Zolotarev, A. A.; Zalkind, O. A. (2011). Ellingsenite, Na5Ca6Si18O38(OH)13*6H2O, a new martinite-related mineral species from phonolite of the Aris alkaline complex, Namibia Note: This is reported as an incomplete structure. The Canadian Mineralogist, 49, pp. 1165-1173.