La2Ti3VO10 crystallizes in the tetragonal I-4m2 space group. La(1) is bonded to two equivalent O(3), two equivalent O(4), four equivalent O(2), and four equivalent O(5) atoms to form LaO12 cuboctahedra that share corners with eight equivalent La(1)O12 cuboctahedra, faces with five equivalent La(1)O12 cuboctahedra, faces with four equivalent Ti(1)O6 octahedra, and faces with four equivalent Ti(2)O6 octahedra. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted TiO6 octahedra that share  a cornercorner with one Ti(2)O6 octahedra, corners with four equivalent Ti(1)O6 octahedra, and faces with four equivalent La(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-23°. In the second Ti site, Ti(2) is bonded to two equivalent O(2) and four equivalent O(5) atoms to form TiO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with four equivalent Ti(2)O6 octahedra, and faces with eight equivalent La(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. V(1) is bonded in a 6-coordinate geometry to two equivalent O(3) and four equivalent O(1) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Ti(1) and two equivalent V(1) atoms. In the second O site, O(2) is bonded to four equivalent La(1), one Ti(1), and one Ti(2) atom to form distorted OLa4Ti2 octahedra that share corners with five equivalent O(2)La4Ti2 octahedra, corners with four equivalent O(4)La2Ti2 trigonal pyramids, edges with four equivalent O(2)La4Ti2 octahedra, and faces with two equivalent O(4)La2Ti2 trigonal pyramids. The corner-sharing octahedral tilt angles range from 0-8°. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent La(1), two equivalent Ti(1), and one V(1) atom. In the fourth O site, O(4) is bonded to two equivalent La(1) and two equivalent Ti(1) atoms to form distorted OLa2Ti2 trigonal pyramids that share corners with four equivalent O(2)La4Ti2 octahedra, corners with four equivalent O(4)La2Ti2 trigonal pyramids, and faces with two equivalent O(2)La4Ti2 octahedra. The corner-sharing octahedral tilt angles are 54°. In the fifth O site, O(5) is bonded in a linear geometry to four equivalent La(1) and two equivalent Ti(2) atoms.
La2Ti3VO10 crystallizes in the tetragonal I-4m2 space group. La(1) is bonded to two equivalent O(3), two equivalent O(4), four equivalent O(2), and four equivalent O(5) atoms to form LaO12 cuboctahedra that share corners with eight equivalent La(1)O12 cuboctahedra, faces with five equivalent La(1)O12 cuboctahedra, faces with four equivalent Ti(1)O6 octahedra, and faces with four equivalent Ti(2)O6 octahedra. Both La(1)-O(3) bond lengths are 2.55 Å. Both La(1)-O(4) bond lengths are 2.52 Å. All La(1)-O(2) bond lengths are 2.77 Å. There are two shorter (2.88 Å) and two longer (2.89 Å) La(1)-O(5) bond lengths. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted TiO6 octahedra that share  a cornercorner with one Ti(2)O6 octahedra, corners with four equivalent Ti(1)O6 octahedra, and faces with four equivalent La(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-23°. The Ti(1)-O(1) bond length is 1.86 Å. The Ti(1)-O(2) bond length is 2.18 Å. Both Ti(1)-O(3) bond lengths are 1.98 Å. Both Ti(1)-O(4) bond lengths are 1.99 Å. In the second Ti site, Ti(2) is bonded to two equivalent O(2) and four equivalent O(5) atoms to form TiO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with four equivalent Ti(2)O6 octahedra, and faces with eight equivalent La(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. Both Ti(2)-O(2) bond lengths are 1.93 Å. All Ti(2)-O(5) bond lengths are 1.95 Å. V(1) is bonded in a 6-coordinate geometry to two equivalent O(3) and four equivalent O(1) atoms. Both V(1)-O(3) bond lengths are 2.74 Å. All V(1)-O(1) bond lengths are 2.02 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Ti(1) and two equivalent V(1) atoms. In the second O site, O(2) is bonded to four equivalent La(1), one Ti(1), and one Ti(2) atom to form distorted OLa4Ti2 octahedra that share corners with five equivalent O(2)La4Ti2 octahedra, corners with four equivalent O(4)La2Ti2 trigonal pyramids, edges with four equivalent O(2)La4Ti2 octahedra, and faces with two equivalent O(4)La2Ti2 trigonal pyramids. The corner-sharing octahedral tilt angles range from 0-8°. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent La(1), two equivalent Ti(1), and one V(1) atom. In the fourth O site, O(4) is bonded to two equivalent La(1) and two equivalent Ti(1) atoms to form distorted OLa2Ti2 trigonal pyramids that share corners with four equivalent O(2)La4Ti2 octahedra, corners with four equivalent O(4)La2Ti2 trigonal pyramids, and faces with two equivalent O(2)La4Ti2 octahedra. The corner-sharing octahedral tilt angles are 54°. In the fifth O site, O(5) is bonded in a linear geometry to four equivalent La(1) and two equivalent Ti(2) atoms.