BaLa2PdO5 crystallizes in the tetragonal P4/mbm space group. Ba(1) is bonded in a distorted q6 geometry to two equivalent O(2) and eight equivalent O(1) atoms. La(1) is bonded in a 8-coordinate geometry to two equivalent O(2) and six equivalent O(1) atoms. Pd(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ba(1), three equivalent La(1), and one Pd(1) atom to form distorted OBa2La3Pd octahedra that share corners with four equivalent O(2)Ba2La4 octahedra, corners with thirteen equivalent O(1)Ba2La3Pd octahedra, edges with five equivalent O(1)Ba2La3Pd octahedra, faces with two equivalent O(2)Ba2La4 octahedra, and faces with three equivalent O(1)Ba2La3Pd octahedra. The corner-sharing octahedral tilt angles range from 0-76°. In the second O site, O(2) is bonded to two equivalent Ba(1) and four equivalent La(1) atoms to form OBa2La4 octahedra that share corners with six equivalent O(2)Ba2La4 octahedra, corners with sixteen equivalent O(1)Ba2La3Pd octahedra, and faces with eight equivalent O(1)Ba2La3Pd octahedra. The corner-sharing octahedral tilt angles range from 0-61°.
BaLa2PdO5 crystallizes in the tetragonal P4/mbm space group. Ba(1) is bonded in a distorted q6 geometry to two equivalent O(2) and eight equivalent O(1) atoms. Both Ba(1)-O(2) bond lengths are 3.00 Å. All Ba(1)-O(1) bond lengths are 3.05 Å. La(1) is bonded in a 8-coordinate geometry to two equivalent O(2) and six equivalent O(1) atoms. Both La(1)-O(2) bond lengths are 2.55 Å. There are two shorter (2.34 Å) and four longer (2.69 Å) La(1)-O(1) bond lengths. Pd(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. All Pd(1)-O(1) bond lengths are 2.03 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ba(1), three equivalent La(1), and one Pd(1) atom to form distorted OBa2La3Pd octahedra that share corners with four equivalent O(2)Ba2La4 octahedra, corners with thirteen equivalent O(1)Ba2La3Pd octahedra, edges with five equivalent O(1)Ba2La3Pd octahedra, faces with two equivalent O(2)Ba2La4 octahedra, and faces with three equivalent O(1)Ba2La3Pd octahedra. The corner-sharing octahedral tilt angles range from 0-76°. In the second O site, O(2) is bonded to two equivalent Ba(1) and four equivalent La(1) atoms to form OBa2La4 octahedra that share corners with six equivalent O(2)Ba2La4 octahedra, corners with sixteen equivalent O(1)Ba2La3Pd octahedra, and faces with eight equivalent O(1)Ba2La3Pd octahedra. The corner-sharing octahedral tilt angles range from 0-61°.