Georgbarsanovite is a very rare mineral of the eudialyte group,[2] formerly known under unaccepted name as barsanovite, with formula Na12(Mn,Sr,REE)3Ca6Fe32+Zr3NbSi(Si3O9)2(Si9O27)2O4Cl2·H2O.

[3] The original formula was extended to show the presence of cyclic silicate groups and the domination of silicon at the M4 site.

[4] "REE", standing for rare earth elements, is dominated by cerium.

The mineral was found in nepheline pegmatite near Petrelius River, Khibiny massif, Kola Peninsula, Russia.

[3] Georgbarsanovite contains admixtures of fluorine, potassium and yttrium, with traces of titanium, hafnium, and barium.