Eu2CaBa2Cu2Ti3O14 crystallizes in the tetragonal P4mm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to four equivalent O(1), four equivalent O(3), and four equivalent O(7) atoms to form BaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, corners with four equivalent Ca(1)O12 cuboctahedra,  a faceface with one Ca(1)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. In the second Ba site, Ba(2) is bonded to four equivalent O(2), four equivalent O(4), and four equivalent O(8) atoms to form distorted BaO12 cuboctahedra that share corners with four equivalent Ba(2)O12 cuboctahedra, corners with four equivalent Eu(2)O12 cuboctahedra,  a faceface with one Eu(2)O12 cuboctahedra, faces with four equivalent Ba(2)O12 cuboctahedra, faces with four equivalent Ti(2)O6 octahedra, and faces with four equivalent Cu(2)O5 square pyramids. Ca(1) is bonded to four equivalent O(5), four equivalent O(7), and four equivalent O(9) atoms to form CaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, corners with four equivalent Ca(1)O12 cuboctahedra, corners with four equivalent Eu(2)O12 cuboctahedra,  a faceface with one Ba(1)O12 cuboctahedra,  a faceface with one Eu(2)O12 cuboctahedra, faces with four equivalent Ca(1)O12 cuboctahedra, faces with four equivalent Ti(1)O6 octahedra, and faces with four equivalent Ti(3)O6 octahedra. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. In the second Eu site, Eu(2) is bonded to four equivalent O(6), four equivalent O(8), and four equivalent O(9) atoms to form EuO12 cuboctahedra that share corners with four equivalent Ba(2)O12 cuboctahedra, corners with four equivalent Ca(1)O12 cuboctahedra, corners with four equivalent Eu(2)O12 cuboctahedra,  a faceface with one Ba(2)O12 cuboctahedra,  a faceface with one Ca(1)O12 cuboctahedra, faces with four equivalent Eu(2)O12 cuboctahedra, faces with four equivalent Ti(2)O6 octahedra, and faces with four equivalent Ti(3)O6 octahedra. There are three inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(3), one O(5), and four equivalent O(7) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra, corners with four 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 Ca(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the second Ti site, Ti(2) is bonded to one O(4), one O(6), and four equivalent O(8) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra, corners with four equivalent Ti(2)O6 octahedra,  a cornercorner with one Cu(2)O5 square pyramid, faces with four equivalent Ba(2)O12 cuboctahedra, and faces with four equivalent Eu(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the third Ti site, Ti(3) is bonded to one O(5), one O(6), and four equivalent O(9) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Ti(2)O6 octahedra, corners with four equivalent Ti(3)O6 octahedra, faces with four equivalent Ca(1)O12 cuboctahedra, and faces with four equivalent Eu(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-7°. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(3) and four equivalent O(1) 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. In the second Cu site, Cu(2) is bonded to one O(4) and four equivalent O(2) atoms to form CuO5 square pyramids that share  a cornercorner with one Ti(2)O6 octahedra, corners with four equivalent Cu(2)O5 square pyramids, and faces with four equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Eu(1), and two equivalent Cu(1) atoms. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Ba(2), two equivalent Eu(1), and two equivalent Cu(2) atoms. In the third O site, O(3) is bonded to four equivalent Ba(1), one Ti(1), and one Cu(1) atom to form a mixture of distorted corner and edge-sharing OBa4TiCu octahedra. The corner-sharing octahedral tilt angles are 11°. In the fourth O site, O(4) is bonded to four equivalent Ba(2), one Ti(2), and one Cu(2) atom to form a mixture of distorted corner and edge-sharing OBa4TiCu octahedra. The corner-sharing octahedral tilt angles are 13°. In the fifth O site, O(5) is bonded in a distorted linear geometry to four equivalent Ca(1), one Ti(1), and one Ti(3) atom. In the sixth O site, O(6) is bonded in a distorted linear geometry to four equivalent Eu(2), one Ti(2), and one Ti(3) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to two equivalent Ba(1), two equivalent Ca(1), and two equivalent Ti(1) atoms. In the eighth O site, O(8) is bonded in a distorted linear geometry to two equivalent Ba(2), two equivalent Eu(2), and two equivalent Ti(2) atoms. In the ninth O site, O(9) is bonded in a distorted linear geometry to two equivalent Ca(1), two equivalent Eu(2), and two equivalent Ti(3) atoms.
Eu2CaBa2Cu2Ti3O14 crystallizes in the tetragonal P4mm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to four equivalent O(1), four equivalent O(3), and four equivalent O(7) atoms to form BaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, corners with four equivalent Ca(1)O12 cuboctahedra,  a faceface with one Ca(1)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 3.02 Å. All Ba(1)-O(3) bond lengths are 2.78 Å. All Ba(1)-O(7) bond lengths are 3.04 Å. In the second Ba site, Ba(2) is bonded to four equivalent O(2), four equivalent O(4), and four equivalent O(8) atoms to form distorted BaO12 cuboctahedra that share corners with four equivalent Ba(2)O12 cuboctahedra, corners with four equivalent Eu(2)O12 cuboctahedra,  a faceface with one Eu(2)O12 cuboctahedra, faces with four equivalent Ba(2)O12 cuboctahedra, faces with four equivalent Ti(2)O6 octahedra, and faces with four equivalent Cu(2)O5 square pyramids. All Ba(2)-O(2) bond lengths are 2.98 Å. All Ba(2)-O(4) bond lengths are 2.79 Å. All Ba(2)-O(8) bond lengths are 3.08 Å. Ca(1) is bonded to four equivalent O(5), four equivalent O(7), and four equivalent O(9) atoms to form CaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, corners with four equivalent Ca(1)O12 cuboctahedra, corners with four equivalent Eu(2)O12 cuboctahedra,  a faceface with one Ba(1)O12 cuboctahedra,  a faceface with one Eu(2)O12 cuboctahedra, faces with four equivalent Ca(1)O12 cuboctahedra, faces with four equivalent Ti(1)O6 octahedra, and faces with four equivalent Ti(3)O6 octahedra. All Ca(1)-O(5) bond lengths are 2.78 Å. All Ca(1)-O(7) bond lengths are 2.58 Å. All Ca(1)-O(9) bond lengths are 2.94 Å. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. All Eu(1)-O(1) bond lengths are 2.47 Å. All Eu(1)-O(2) bond lengths are 2.48 Å. In the second Eu site, Eu(2) is bonded to four equivalent O(6), four equivalent O(8), and four equivalent O(9) atoms to form EuO12 cuboctahedra that share corners with four equivalent Ba(2)O12 cuboctahedra, corners with four equivalent Ca(1)O12 cuboctahedra, corners with four equivalent Eu(2)O12 cuboctahedra,  a faceface with one Ba(2)O12 cuboctahedra,  a faceface with one Ca(1)O12 cuboctahedra, faces with four equivalent Eu(2)O12 cuboctahedra, faces with four equivalent Ti(2)O6 octahedra, and faces with four equivalent Ti(3)O6 octahedra. All Eu(2)-O(6) bond lengths are 2.77 Å. All Eu(2)-O(8) bond lengths are 2.69 Å. All Eu(2)-O(9) bond lengths are 2.72 Å. There are three inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(3), one O(5), and four equivalent O(7) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra, corners with four 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 Ca(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-10°. The Ti(1)-O(3) bond length is 1.88 Å. The Ti(1)-O(5) bond length is 2.06 Å. All Ti(1)-O(7) bond lengths are 1.96 Å. In the second Ti site, Ti(2) is bonded to one O(4), one O(6), and four equivalent O(8) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra, corners with four equivalent Ti(2)O6 octahedra,  a cornercorner with one Cu(2)O5 square pyramid, faces with four equivalent Ba(2)O12 cuboctahedra, and faces with four equivalent Eu(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-10°. The Ti(2)-O(4) bond length is 1.89 Å. The Ti(2)-O(6) bond length is 2.03 Å. All Ti(2)-O(8) bond lengths are 1.96 Å. In the third Ti site, Ti(3) is bonded to one O(5), one O(6), and four equivalent O(9) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Ti(2)O6 octahedra, corners with four equivalent Ti(3)O6 octahedra, faces with four equivalent Ca(1)O12 cuboctahedra, and faces with four equivalent Eu(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-7°. The Ti(3)-O(5) bond length is 1.86 Å. The Ti(3)-O(6) bond length is 2.00 Å. All Ti(3)-O(9) bond lengths are 1.96 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(3) and four equivalent O(1) 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(3) bond length is 2.34 Å. All Cu(1)-O(1) bond lengths are 1.97 Å. In the second Cu site, Cu(2) is bonded to one O(4) and four equivalent O(2) atoms to form CuO5 square pyramids that share  a cornercorner with one Ti(2)O6 octahedra, corners with four equivalent Cu(2)O5 square pyramids, and faces with four equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. The Cu(2)-O(4) bond length is 2.36 Å. All Cu(2)-O(2) bond lengths are 1.97 Å. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Eu(1), and two equivalent Cu(1) atoms. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Ba(2), two equivalent Eu(1), and two equivalent Cu(2) atoms. In the third O site, O(3) is bonded to four equivalent Ba(1), one Ti(1), and one Cu(1) atom to form a mixture of distorted corner and edge-sharing OBa4TiCu octahedra. The corner-sharing octahedral tilt angles are 11°. In the fourth O site, O(4) is bonded to four equivalent Ba(2), one Ti(2), and one Cu(2) atom to form a mixture of distorted corner and edge-sharing OBa4TiCu octahedra. The corner-sharing octahedral tilt angles are 13°. In the fifth O site, O(5) is bonded in a distorted linear geometry to four equivalent Ca(1), one Ti(1), and one Ti(3) atom. In the sixth O site, O(6) is bonded in a distorted linear geometry to four equivalent Eu(2), one Ti(2), and one Ti(3) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to two equivalent Ba(1), two equivalent Ca(1), and two equivalent Ti(1) atoms. In the eighth O site, O(8) is bonded in a distorted linear geometry to two equivalent Ba(2), two equivalent Eu(2), and two equivalent Ti(2) atoms. In the ninth O site, O(9) is bonded in a distorted linear geometry to two equivalent Ca(1), two equivalent Eu(2), and two equivalent Ti(3) atoms.