AM_Fergusonite-(Y) Formula: (Y.85 Yb.15) Nb O4 Name: Fergusonite-(Y) Unit cell: 5.16 5.16 10.89 90.0 90.0 90.0 , V=289.95 Space group: I141/A1 (1)

Komkov A I , Soviet Physics Crystallography , 4 (1959) p.796-800, The structure of natural fergusonite, and a polymorphic modification, Locality: Ural Mountains, Russia