Crystal structures and magnetic properties of BaTiF5 and CaTiF5

Single crystals of BaTiF5 and CaTiF5 were obtained by the Czochralski and Bridgman techniques, respectively. The crystal structures were determined by X-ray diffraction; BaTiF5: 14m, a = 15.091(5)Å, c = 7.670(3)Å; CaTiF5: I2c, a = 9.080(4)Å, b = 6.614Å, c = 7.696(3)Å, β = 115.16(3)°. Both structures are characterized by the presence of either branched or straight chains of TiF6 octahedra. BaTiF5 contains the unusual dimeric unit (Ti2F10)4−. Magnetic susceptibility measurements were performed on both compounds in the temperature range 4.2 to 300 K, however, no evidence for magnetic interactions between the Ti3+ moments were observed.