La3SbO7 crystallizes in the orthorhombic Pnma space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a body-centered cubic geometry to two equivalent O(2), two equivalent O(4), and four equivalent O(3) atoms. In the second La site, La(2) is bonded to one O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted LaO7 pentagonal bipyramids that share corners with two equivalent Sb(1)O6 octahedra, corners with three equivalent La(2)O7 pentagonal bipyramids, edges with two equivalent Sb(1)O6 octahedra, and edges with two equivalent La(2)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 37-38°. Sb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form SbO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with four equivalent La(2)O7 pentagonal bipyramids, and edges with four equivalent La(2)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 33°. There are four inequivalent O sites. In the first O site, O(4) is bonded in a 4-coordinate geometry to one La(1), two equivalent La(2), and one Sb(1) atom. In the second O site, O(1) is bonded in a 4-coordinate geometry to two equivalent La(2) and two equivalent Sb(1) atoms. In the third O site, O(2) is bonded in a 4-coordinate geometry to one La(1), two equivalent La(2), and one Sb(1) atom. In the fourth O site, O(3) is bonded to two equivalent La(1) and two equivalent La(2) atoms to form a mixture of corner and edge-sharing OLa4 tetrahedra.
La3SbO7 crystallizes in the orthorhombic Pnma space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a body-centered cubic geometry to two equivalent O(2), two equivalent O(4), and four equivalent O(3) atoms. Both La(1)-O(2) bond lengths are 2.81 Å. Both La(1)-O(4) bond lengths are 2.78 Å. All La(1)-O(3) bond lengths are 2.43 Å. In the second La site, La(2) is bonded to one O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted LaO7 pentagonal bipyramids that share corners with two equivalent Sb(1)O6 octahedra, corners with three equivalent La(2)O7 pentagonal bipyramids, edges with two equivalent Sb(1)O6 octahedra, and edges with two equivalent La(2)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 37-38°. The La(2)-O(1) bond length is 2.72 Å. There is one shorter (2.49 Å) and one longer (2.50 Å) La(2)-O(2) bond length. Both La(2)-O(3) bond lengths are 2.34 Å. There is one shorter (2.49 Å) and one longer (2.50 Å) La(2)-O(4) bond length. Sb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form SbO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with four equivalent La(2)O7 pentagonal bipyramids, and edges with four equivalent La(2)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 33°. Both Sb(1)-O(1) bond lengths are 2.02 Å. Both Sb(1)-O(2) bond lengths are 1.99 Å. Both Sb(1)-O(4) bond lengths are 1.99 Å. There are four inequivalent O sites. In the first O site, O(4) is bonded in a 4-coordinate geometry to one La(1), two equivalent La(2), and one Sb(1) atom. In the second O site, O(1) is bonded in a 4-coordinate geometry to two equivalent La(2) and two equivalent Sb(1) atoms. In the third O site, O(2) is bonded in a 4-coordinate geometry to one La(1), two equivalent La(2), and one Sb(1) atom. In the fourth O site, O(3) is bonded to two equivalent La(1) and two equivalent La(2) atoms to form a mixture of corner and edge-sharing OLa4 tetrahedra.