AM_Tveitite Formula: Y5.298 Na1.958 Ca9.434 Nd.954 Ho.48 F41.06 Name: Tveitite Unit cell: 17.02 17.02 9.679 90.0 90.0 120.0 , V=2428.18 Space group: R11-3 (1)

Yakubovich O V , Massa W , Pekov I V , Gavrilenko P G , Crystallography Reports , 52 (2007) p.71-79, Crystal structure of tveitite-(Y): fractionation of rare-earth elements, between positions and the variety of defects, Locality: Rov-Gora Mountain, West Keivy, Kola Peninsula, Russia