%0 Journal Article %T Dissymmetrization in eudialyte-group minerals. IV. Features of the blocky isomorphism in the structure of the Nb-deficient oneillite analogue in the frame of P3-symmetry %A . Rastsvetaeva, R.K. %A Chukanov, N.V. %A Gridchina, V.M. %A Aksenov, S.M. %K eudialyte group, oneillite, crystal structure, blocky isomorphism, key sites, primitive unit cell, Mont Saint-Hilaire %J Vestnik of geosciences %D 2024 %N 0 %P 5 %I FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"