Citation: Maksimov, B.A.; Gubina, Yu.B.; Sobolev, B.P.; Molchanov, V.N.; Grigor'eva, N.B.; Belokoneva, E.L.; Vigdorchik, A.G.; Krivandina, E.A. (2002). The Ba1-x Rx F2+x (R = Gd - Lu) phases with the distorted fluorite structure as products of crystallization of incongruent melts in (Ba F2)-(R F3) systems. II.Crystal structures of two new forms of Ba1-x Ybx F2+x fluorite phases ..... Kristallografiya, 47, pp. 417-423.