La3SbO3 crystallizes in the monoclinic C2/m space group. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 4-coordinate geometry to four equivalent Sb(1), one O(2), and three equivalent O(1) atoms. In the second La site, La(2) is bonded in a distorted see-saw-like geometry to two equivalent Sb(1), one O(2), and three equivalent O(3) atoms. In the third La site, La(3) is bonded in a distorted see-saw-like geometry to two equivalent Sb(1), one O(1), one O(3), and two equivalent O(2) atoms. Sb(1) is bonded in a body-centered cubic geometry to two equivalent La(2), two equivalent La(3), and four equivalent La(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to one La(3) and three equivalent La(1) atoms to form a mixture of corner and edge-sharing OLa4 tetrahedra. In the second O site, O(2) is bonded to one La(1), one La(2), and two equivalent La(3) atoms to form a mixture of distorted corner and edge-sharing OLa4 trigonal pyramids. In the third O site, O(3) is bonded to one La(3) and three equivalent La(2) atoms to form a mixture of corner and edge-sharing OLa4 trigonal pyramids.
La3SbO3 crystallizes in the monoclinic C2/m space group. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 4-coordinate geometry to four equivalent Sb(1), one O(2), and three equivalent O(1) atoms. There are two shorter (3.58 Å) and two longer (3.59 Å) La(1)-Sb(1) bond lengths. The La(1)-O(2) bond length is 2.72 Å. There is one shorter (2.39 Å) and two longer (2.40 Å) La(1)-O(1) bond lengths. In the second La site, La(2) is bonded in a distorted see-saw-like geometry to two equivalent Sb(1), one O(2), and three equivalent O(3) atoms. Both La(2)-Sb(1) bond lengths are 3.35 Å. The La(2)-O(2) bond length is 2.34 Å. There are two shorter (2.41 Å) and one longer (2.59 Å) La(2)-O(3) bond length. In the third La site, La(3) is bonded in a distorted see-saw-like geometry to two equivalent Sb(1), one O(1), one O(3), and two equivalent O(2) atoms. Both La(3)-Sb(1) bond lengths are 3.42 Å. The La(3)-O(1) bond length is 2.33 Å. The La(3)-O(3) bond length is 2.46 Å. Both La(3)-O(2) bond lengths are 2.39 Å. Sb(1) is bonded in a body-centered cubic geometry to two equivalent La(2), two equivalent La(3), and four equivalent La(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to one La(3) and three equivalent La(1) atoms to form a mixture of corner and edge-sharing OLa4 tetrahedra. In the second O site, O(2) is bonded to one La(1), one La(2), and two equivalent La(3) atoms to form a mixture of distorted corner and edge-sharing OLa4 trigonal pyramids. In the third O site, O(3) is bonded to one La(3) and three equivalent La(2) atoms to form a mixture of corner and edge-sharing OLa4 trigonal pyramids.