Amber-colored single crystals of the quaternary oxide BaKFeO3 were synthesized from a mixture of Fe2O3, KOH and Ba(OH)2 heated at 750°C for 5h then cooled slowly. The structure was determined by single-crystal X-ray diffraction (space group Cmca; a=5.804(1)Å, b=11.528(1)Å, c=12.776(1)Å; Z=8, R 1=0.0376, wR2=0.0996). The structure is comprised of [FeO33-]∞ chains of corner-sharing iron-oxo tetrahedra that are isolated from one another by interspersed Ba and K cations. The iron coordination environment is moderately distorted from perfect tetrahedral symmetry and the Fe-O-Fe bond angles are 152.8°. Magnetic susceptibility data show a pronounced zero-field cooling effect that suggests strong coupling from 5K to above room temperature.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry