Crystal structures and phase transitions in Sr doped Ba2InTaO6 perovskites

CaLa2FeCoSbO9 and ALa2FeNiSbO9 (A = Ca, Sr, Ba): cation-ordered, inhomogeneous, ferrimagnetic perovskites

“…I2/m (aac 0 )) with increasing A cation size. A similar phase transformation has also been reported for Ba2-xSrxInTaO6 [24].…”

Structural and magnetic properties of the ruthenium double perovskites Ba2−xSrxYRuO6

“…This sequence of phases is also found upon cooling the samples to 90 K with the phase boundary shifted, and is the same as that observed in a number of other double perovskite families including A 2 NiWO 6 , 28 A 2 CoWO 6 29 and A 2 InTaO 6 . 30 Of the three observed transitions, the I4/m to I2/m transition, which involves a reorientation of the out-of-phase tilts from [001] to [110], must be first order. 13 Conversely the Fm3 ˉm→I4/m and I2/m→P2 1 /n transitions, involve the introduction of a new tilt and are allowed to be continuous.…”

Investigation on the electronic structure, optical, elastic, mechanical, thermodynamic and thermoelectric properties of wide band gap semiconductor double perovskite Ba2InTaO6

“…They observed that the material has cubic symmetry, space group Fm 3m (225), a lattice constant of 8.282Å with Ba atoms at 8c (1/4, 1/4, 1/4), In atoms at 4b (0.5, 0.5, 0.5), Ta cited at 4a (0, 0, 0) and O atoms at position 24e (x, 0, 0) of the unit cell where x ¼ 0.2565. Zhou et al 35 have reported structural phase transition in Sr-doped Ba 2 InTaO 6 , using synchrotron X-ray and neutron powder diffraction techniques, where Ba 2Àx Sr x InTaO 6 underwent a series of phase transitions from cubic to monoclinic. Song et al 36 have also reported the ordered cubic structure in Ba 2 InTaO 6 .…”