RbTaO3 is (Cubic) Perovskite structured and crystallizes in the trigonal R3m space group. Rb(1) is bonded to twelve equivalent O(1) atoms to form RbO12 cuboctahedra that share corners with twelve equivalent Rb(1)O12 cuboctahedra, faces with six equivalent Rb(1)O12 cuboctahedra, and faces with eight equivalent Ta(1)O6 octahedra. Ta(1) is bonded to six equivalent O(1) atoms to form TaO6 octahedra that share corners with six equivalent Ta(1)O6 octahedra and faces with eight equivalent Rb(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 7°. O(1) is bonded in a 2-coordinate geometry to four equivalent Rb(1) and two equivalent Ta(1) atoms.
RbTaO3 is (Cubic) Perovskite structured and crystallizes in the trigonal R3m space group. Rb(1) is bonded to twelve equivalent O(1) atoms to form RbO12 cuboctahedra that share corners with twelve equivalent Rb(1)O12 cuboctahedra, faces with six equivalent Rb(1)O12 cuboctahedra, and faces with eight equivalent Ta(1)O6 octahedra. There are a spread of Rb(1)-O(1) bond distances ranging from 2.84-2.95 Å. Ta(1) is bonded to six equivalent O(1) atoms to form TaO6 octahedra that share corners with six equivalent Ta(1)O6 octahedra and faces with eight equivalent Rb(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 7°. There are three shorter (1.94 Å) and three longer (2.16 Å) Ta(1)-O(1) bond lengths. O(1) is bonded in a 2-coordinate geometry to four equivalent Rb(1) and two equivalent Ta(1) atoms.