Mogovidite is a very rare mineral of the eudialyte group,[3] It is similar to feklichevite, differing from it in the presence of essential vacancies (at the M3 site) and carbonate group.
[4] The formula given is based on the original one but extended to show the presence of cyclic silicate groups.
As golyshevite, mogovidite was discovered in calcium-bearing peralkaline pegmatites of the Kovdor massif, Kola Peninsula, Russia.
Association of mogovidite: aegirine-augite, andradite, calcite, humite, nepheline, pectolite, scolecite, titanite, zircon.
[4] Chemical impurities in mogovidite include chlorine, potassium, and manganese, with trace titanium, cerium, and lanthanum.