title: Universal octahedral-site distortion in orthorhombic perovskite oxides.
abstract: Lattice parameters of the orthorhombic perovskites RMO3 (R=rare earth, M=Ti, V, ..., Ni, and Ga) have been simulated based on the ionic M-O bond length and rigid MO6/2 octahedra. Comparison with experimental data shows that the long-standing lattice-parameter anomaly generally found for the larger R3+ ions in these families is caused by a structural feature that is not revealed by the geometric tolerance factor widely used for the perovskites.
authors.affiliation: Texas Materials Institute, ETC 9.102, University of Texas at Austin, 1 University Station, C2201, Austin, Texas 78712, USA.
authors.forename: J-S
authors.initials: JS
authors.lastname: Zhou
authors.forename: J B
authors.initials: JB
authors.lastname: Goodenough