Ilyukhinite is a very rare mineral of the eudialyte group, with formula .Chukanov, N.V., Rastsvetaeva, R.K., Rozenberg, K.A., Aksenov, S.M., Pekov, I.V., Belakovskiy, D.I., and Kristiansen, R., 2015, Ilyukhinite, IMA 2015-065. CNMNC Newsletter No. 28, December 2015, 1860; Mineralogical Magazine 79, 1859–1864 The formula given is simplified and does not show the presence of cyclic silicate groups. Ilyukhinite is the second group representative with species-defining hydronium ion after aqualite.
References
Further reading Johnsen, O., Ferraris, G., Gault, R.A., Grice, D.G., Kampf, A.R., and Pekov, I.V., 2003. The nomenclature of eudialyte-group minerals. The Canadian Mineralogist 41, 785–794