ZnOLa2O3 crystallizes in the orthorhombic Pnma space group. There are two inequivalent La sites. In the first La site, La(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form edge-sharing LaO6 octahedra. In the second La site, La(2) is bonded in a 7-coordinate geometry to one O(2), one O(3), two equivalent O(4), and three equivalent O(1) atoms. Zn(1) is bonded in a trigonal planar geometry to one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded to one La(1) and three equivalent La(2) atoms to form OLa4 tetrahedra that share corners with two equivalent O(1)La4 tetrahedra, corners with five equivalent O(3)La3Zn tetrahedra, corners with five equivalent O(4)La3Zn tetrahedra,  a cornercorner with one O(2)La3Zn trigonal pyramid,  an edgeedge with one O(4)La3Zn tetrahedra, edges with two equivalent O(1)La4 tetrahedra, and edges with two equivalent O(2)La3Zn trigonal pyramids. In the second O site, O(2) is bonded to one La(2), two equivalent La(1), and one Zn(1) atom to form distorted OLa3Zn trigonal pyramids that share  a cornercorner with one O(1)La4 tetrahedra, corners with two equivalent O(3)La3Zn tetrahedra, corners with five equivalent O(4)La3Zn tetrahedra, corners with two equivalent O(2)La3Zn trigonal pyramids, edges with two equivalent O(3)La3Zn tetrahedra, and edges with two equivalent O(1)La4 tetrahedra. In the third O site, O(3) is bonded to one La(2), two equivalent La(1), and one Zn(1) atom to form OLa3Zn tetrahedra that share  a cornercorner with one O(4)La3Zn tetrahedra, corners with two equivalent O(3)La3Zn tetrahedra, corners with five equivalent O(1)La4 tetrahedra, corners with two equivalent O(2)La3Zn trigonal pyramids, edges with two equivalent O(4)La3Zn tetrahedra, and edges with two equivalent O(2)La3Zn trigonal pyramids. In the fourth O site, O(4) is bonded to one La(1), two equivalent La(2), and one Zn(1) atom to form OLa3Zn tetrahedra that share  a cornercorner with one O(3)La3Zn tetrahedra, corners with two equivalent O(4)La3Zn tetrahedra, corners with five equivalent O(1)La4 tetrahedra, corners with five equivalent O(2)La3Zn trigonal pyramids,  an edgeedge with one O(1)La4 tetrahedra, and edges with two equivalent O(3)La3Zn tetrahedra.
ZnOLa2O3 crystallizes in the orthorhombic Pnma space group. There are two inequivalent La sites. In the first La site, La(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form edge-sharing LaO6 octahedra. The La(1)-O(1) bond length is 2.43 Å. The La(1)-O(4) bond length is 2.51 Å. Both La(1)-O(2) bond lengths are 2.43 Å. Both La(1)-O(3) bond lengths are 2.46 Å. In the second La site, La(2) is bonded in a 7-coordinate geometry to one O(2), one O(3), two equivalent O(4), and three equivalent O(1) atoms. The La(2)-O(2) bond length is 2.94 Å. The La(2)-O(3) bond length is 2.48 Å. Both La(2)-O(4) bond lengths are 2.51 Å. There are two shorter (2.44 Å) and one longer (2.48 Å) La(2)-O(1) bond length. Zn(1) is bonded in a trigonal planar geometry to one O(2), one O(3), and one O(4) atom. The Zn(1)-O(2) bond length is 1.91 Å. The Zn(1)-O(3) bond length is 1.91 Å. The Zn(1)-O(4) bond length is 1.87 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded to one La(1) and three equivalent La(2) atoms to form OLa4 tetrahedra that share corners with two equivalent O(1)La4 tetrahedra, corners with five equivalent O(3)La3Zn tetrahedra, corners with five equivalent O(4)La3Zn tetrahedra,  a cornercorner with one O(2)La3Zn trigonal pyramid,  an edgeedge with one O(4)La3Zn tetrahedra, edges with two equivalent O(1)La4 tetrahedra, and edges with two equivalent O(2)La3Zn trigonal pyramids. In the second O site, O(2) is bonded to one La(2), two equivalent La(1), and one Zn(1) atom to form distorted OLa3Zn trigonal pyramids that share  a cornercorner with one O(1)La4 tetrahedra, corners with two equivalent O(3)La3Zn tetrahedra, corners with five equivalent O(4)La3Zn tetrahedra, corners with two equivalent O(2)La3Zn trigonal pyramids, edges with two equivalent O(3)La3Zn tetrahedra, and edges with two equivalent O(1)La4 tetrahedra. In the third O site, O(3) is bonded to one La(2), two equivalent La(1), and one Zn(1) atom to form OLa3Zn tetrahedra that share  a cornercorner with one O(4)La3Zn tetrahedra, corners with two equivalent O(3)La3Zn tetrahedra, corners with five equivalent O(1)La4 tetrahedra, corners with two equivalent O(2)La3Zn trigonal pyramids, edges with two equivalent O(4)La3Zn tetrahedra, and edges with two equivalent O(2)La3Zn trigonal pyramids. In the fourth O site, O(4) is bonded to one La(1), two equivalent La(2), and one Zn(1) atom to form OLa3Zn tetrahedra that share  a cornercorner with one O(3)La3Zn tetrahedra, corners with two equivalent O(4)La3Zn tetrahedra, corners with five equivalent O(1)La4 tetrahedra, corners with five equivalent O(2)La3Zn trigonal pyramids,  an edgeedge with one O(1)La4 tetrahedra, and edges with two equivalent O(3)La3Zn tetrahedra.