La4PdO7 crystallizes in the monoclinic C2/m space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a distorted body-centered cubic geometry to one O(4), two equivalent O(2), two equivalent O(3), and three equivalent O(1) atoms. In the second La site, La(2) is bonded in a 7-coordinate geometry to one O(1), one O(4), two equivalent O(3), and three equivalent O(2) atoms. Pd(1) is bonded in a square co-planar geometry to two equivalent O(2) and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to one La(2) and three equivalent La(1) atoms to form OLa4 tetrahedra that share corners with two equivalent O(4)La4Pd2 octahedra, corners with seven equivalent O(2)La5Pd octahedra, corners with two equivalent O(1)La4 tetrahedra, corners with four equivalent O(3)La4 tetrahedra,  an edgeedge with one O(4)La4Pd2 octahedra,  an edgeedge with one O(2)La5Pd octahedra, edges with two equivalent O(1)La4 tetrahedra, and edges with two equivalent O(3)La4 tetrahedra. The corner-sharing octahedral tilt angles range from 14-73°. In the second O site, O(2) is bonded to two equivalent La(1), three equivalent La(2), and one Pd(1) atom to form distorted OLa5Pd octahedra that share  a cornercorner with one O(4)La4Pd2 octahedra,  a cornercorner with one O(2)La5Pd octahedra, corners with four equivalent O(3)La4 tetrahedra, corners with seven equivalent O(1)La4 tetrahedra, edges with four equivalent O(2)La5Pd octahedra,  an edgeedge with one O(1)La4 tetrahedra, edges with three equivalent O(3)La4 tetrahedra, and faces with two equivalent O(4)La4Pd2 octahedra. The corner-sharing octahedral tilt angles range from 0-33°. In the third O site, O(3) is bonded to two equivalent La(1) and two equivalent La(2) atoms to form OLa4 tetrahedra that share corners with four equivalent O(4)La4Pd2 octahedra, corners with four equivalent O(2)La5Pd octahedra, corners with two equivalent O(3)La4 tetrahedra, corners with four equivalent O(1)La4 tetrahedra, edges with three equivalent O(2)La5Pd octahedra,  an edgeedge with one O(3)La4 tetrahedra, and edges with two equivalent O(1)La4 tetrahedra. The corner-sharing octahedral tilt angles range from 5-76°. In the fourth O site, O(4) is bonded to two equivalent La(1), two equivalent La(2), and two equivalent Pd(1) atoms to form distorted OLa4Pd2 octahedra that share corners with two equivalent O(4)La4Pd2 octahedra, corners with two equivalent O(2)La5Pd octahedra, corners with four equivalent O(1)La4 tetrahedra, corners with eight equivalent O(3)La4 tetrahedra, edges with two equivalent O(1)La4 tetrahedra, and faces with four equivalent O(2)La5Pd octahedra. The corner-sharing octahedral tilt angles range from 0-33°.
La4PdO7 crystallizes in the monoclinic C2/m space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a distorted body-centered cubic geometry to one O(4), two equivalent O(2), two equivalent O(3), and three equivalent O(1) atoms. The La(1)-O(4) bond length is 3.00 Å. Both La(1)-O(2) bond lengths are 2.86 Å. There is one shorter (2.45 Å) and one longer (2.48 Å) La(1)-O(3) bond length. There are two shorter (2.40 Å) and one longer (2.51 Å) La(1)-O(1) bond length. In the second La site, La(2) is bonded in a 7-coordinate geometry to one O(1), one O(4), two equivalent O(3), and three equivalent O(2) atoms. The La(2)-O(1) bond length is 2.32 Å. The La(2)-O(4) bond length is 2.56 Å. Both La(2)-O(3) bond lengths are 2.37 Å. There is one shorter (2.50 Å) and two longer (2.79 Å) La(2)-O(2) bond lengths. Pd(1) is bonded in a square co-planar geometry to two equivalent O(2) and two equivalent O(4) atoms. Both Pd(1)-O(2) bond lengths are 2.06 Å. Both Pd(1)-O(4) bond lengths are 2.05 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded to one La(2) and three equivalent La(1) atoms to form OLa4 tetrahedra that share corners with two equivalent O(4)La4Pd2 octahedra, corners with seven equivalent O(2)La5Pd octahedra, corners with two equivalent O(1)La4 tetrahedra, corners with four equivalent O(3)La4 tetrahedra,  an edgeedge with one O(4)La4Pd2 octahedra,  an edgeedge with one O(2)La5Pd octahedra, edges with two equivalent O(1)La4 tetrahedra, and edges with two equivalent O(3)La4 tetrahedra. The corner-sharing octahedral tilt angles range from 14-73°. In the second O site, O(2) is bonded to two equivalent La(1), three equivalent La(2), and one Pd(1) atom to form distorted OLa5Pd octahedra that share  a cornercorner with one O(4)La4Pd2 octahedra,  a cornercorner with one O(2)La5Pd octahedra, corners with four equivalent O(3)La4 tetrahedra, corners with seven equivalent O(1)La4 tetrahedra, edges with four equivalent O(2)La5Pd octahedra,  an edgeedge with one O(1)La4 tetrahedra, edges with three equivalent O(3)La4 tetrahedra, and faces with two equivalent O(4)La4Pd2 octahedra. The corner-sharing octahedral tilt angles range from 0-33°. In the third O site, O(3) is bonded to two equivalent La(1) and two equivalent La(2) atoms to form OLa4 tetrahedra that share corners with four equivalent O(4)La4Pd2 octahedra, corners with four equivalent O(2)La5Pd octahedra, corners with two equivalent O(3)La4 tetrahedra, corners with four equivalent O(1)La4 tetrahedra, edges with three equivalent O(2)La5Pd octahedra,  an edgeedge with one O(3)La4 tetrahedra, and edges with two equivalent O(1)La4 tetrahedra. The corner-sharing octahedral tilt angles range from 5-76°. In the fourth O site, O(4) is bonded to two equivalent La(1), two equivalent La(2), and two equivalent Pd(1) atoms to form distorted OLa4Pd2 octahedra that share corners with two equivalent O(4)La4Pd2 octahedra, corners with two equivalent O(2)La5Pd octahedra, corners with four equivalent O(1)La4 tetrahedra, corners with eight equivalent O(3)La4 tetrahedra, edges with two equivalent O(1)La4 tetrahedra, and faces with four equivalent O(2)La5Pd octahedra. The corner-sharing octahedral tilt angles range from 0-33°.