La2Ba2Cu2Ti2O11 crystallizes in the tetragonal P4/mmm space group. Ba(1) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(4) atoms to form distorted BaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, corners with four equivalent La(2)O12 cuboctahedra,  a faceface with one La(2)O12 cuboctahedra, faces with four equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Ti(1)O6 octahedra, and faces with four equivalent Cu(1)O5 square pyramids. There are two inequivalent La sites. In the first La site, La(1) is bonded in a body-centered cubic geometry to eight equivalent O(2) atoms. In the second La site, La(2) is bonded to four equivalent O(3) and eight equivalent O(4) atoms to form LaO12 cuboctahedra that share corners with four equivalent La(2)O12 cuboctahedra, corners with eight equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with four equivalent La(2)O12 cuboctahedra, and faces with eight equivalent Ti(1)O6 octahedra. Ti(1) is bonded to one O(1), one O(3), and four equivalent O(4) atoms to form TiO6 octahedra that share corners with five equivalent Ti(1)O6 octahedra,  a cornercorner with one Cu(1)O5 square pyramid, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent La(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-11°. Cu(1) is bonded to one O(1) and four equivalent O(2) atoms to form CuO5 square pyramids that share  a cornercorner with one Ti(1)O6 octahedra, corners with four equivalent Cu(1)O5 square pyramids, and faces with four equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to four equivalent Ba(1), one Ti(1), and one Cu(1) atom. In the second O site, O(2) is bonded to two equivalent Ba(1), two equivalent La(1), and two equivalent Cu(1) atoms to form a mixture of distorted corner, edge, and face-sharing OBa2La2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-67°. In the third O site, O(3) is bonded in a distorted linear geometry to four equivalent La(2) and two equivalent Ti(1) atoms. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Ba(1), two equivalent La(2), and two equivalent Ti(1) atoms.
La2Ba2Cu2Ti2O11 crystallizes in the tetragonal P4/mmm space group. Ba(1) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(4) atoms to form distorted BaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, corners with four equivalent La(2)O12 cuboctahedra,  a faceface with one La(2)O12 cuboctahedra, faces with four equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Ti(1)O6 octahedra, and faces with four equivalent Cu(1)O5 square pyramids. All Ba(1)-O(1) bond lengths are 2.82 Å. All Ba(1)-O(2) bond lengths are 2.94 Å. All Ba(1)-O(4) bond lengths are 3.13 Å. There are two inequivalent La sites. In the first La site, La(1) is bonded in a body-centered cubic geometry to eight equivalent O(2) atoms. All La(1)-O(2) bond lengths are 2.53 Å. In the second La site, La(2) is bonded to four equivalent O(3) and eight equivalent O(4) atoms to form LaO12 cuboctahedra that share corners with four equivalent La(2)O12 cuboctahedra, corners with eight equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with four equivalent La(2)O12 cuboctahedra, and faces with eight equivalent Ti(1)O6 octahedra. All La(2)-O(3) bond lengths are 2.80 Å. All La(2)-O(4) bond lengths are 2.70 Å. Ti(1) is bonded to one O(1), one O(3), and four equivalent O(4) atoms to form TiO6 octahedra that share corners with five equivalent Ti(1)O6 octahedra,  a cornercorner with one Cu(1)O5 square pyramid, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent La(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-11°. The Ti(1)-O(1) bond length is 1.86 Å. The Ti(1)-O(3) bond length is 2.03 Å. All Ti(1)-O(4) bond lengths are 1.99 Å. Cu(1) is bonded to one O(1) and four equivalent O(2) atoms to form CuO5 square pyramids that share  a cornercorner with one Ti(1)O6 octahedra, corners with four equivalent Cu(1)O5 square pyramids, and faces with four equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. The Cu(1)-O(1) bond length is 2.34 Å. All Cu(1)-O(2) bond lengths are 1.99 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to four equivalent Ba(1), one Ti(1), and one Cu(1) atom. In the second O site, O(2) is bonded to two equivalent Ba(1), two equivalent La(1), and two equivalent Cu(1) atoms to form a mixture of distorted corner, edge, and face-sharing OBa2La2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-67°. In the third O site, O(3) is bonded in a distorted linear geometry to four equivalent La(2) and two equivalent Ti(1) atoms. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Ba(1), two equivalent La(2), and two equivalent Ti(1) atoms.