LiBa2Eu(CuO2)4 crystallizes in the monoclinic P2/m space group. Li(1) is bonded in a 8-coordinate geometry to four equivalent Cu(2) and four equivalent O(3) atoms. Ba(1) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(4), and four equivalent O(1) atoms. Eu(1) is bonded in a body-centered cubic geometry to four equivalent O(2) and four equivalent O(4) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted corner-sharing CuO5 square pyramids. In the second Cu site, Cu(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li(1), one O(1), and three equivalent O(3) atoms. 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 Cu(1), and one Cu(2) atom. In the second O site, O(2) is bonded to two equivalent Ba(1), two equivalent Eu(1), and two equivalent Cu(1) atoms to form a mixture of distorted corner, face, and edge-sharing OBa2Eu2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-67°. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Li(1), two equivalent Ba(1), and three equivalent Cu(2) atoms. In the fourth O site, O(4) is bonded to two equivalent Ba(1), two equivalent Eu(1), and two equivalent Cu(1) atoms to form a mixture of distorted corner, face, and edge-sharing OBa2Eu2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-67°.
LiBa2Eu(CuO2)4 crystallizes in the monoclinic P2/m space group. Li(1) is bonded in a 8-coordinate geometry to four equivalent Cu(2) and four equivalent O(3) atoms. All Li(1)-Cu(2) bond lengths are 2.48 Å. All Li(1)-O(3) bond lengths are 2.28 Å. Ba(1) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(4), and four equivalent O(1) atoms. Both Ba(1)-O(2) bond lengths are 2.88 Å. Both Ba(1)-O(3) bond lengths are 3.33 Å. There is one shorter (2.92 Å) and one longer (2.93 Å) Ba(1)-O(4) bond length. There are two shorter (2.79 Å) and two longer (2.83 Å) Ba(1)-O(1) bond lengths. Eu(1) is bonded in a body-centered cubic geometry to four equivalent O(2) and four equivalent O(4) atoms. All Eu(1)-O(2) bond lengths are 2.48 Å. There are two shorter (2.50 Å) and two longer (2.51 Å) Eu(1)-O(4) bond lengths. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted corner-sharing CuO5 square pyramids. The Cu(1)-O(1) bond length is 2.61 Å. Both Cu(1)-O(2) bond lengths are 1.97 Å. Both Cu(1)-O(4) bond lengths are 1.93 Å. In the second Cu site, Cu(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li(1), one O(1), and three equivalent O(3) atoms. The Cu(2)-O(1) bond length is 1.84 Å. There are a spread of Cu(2)-O(3) bond distances ranging from 1.95-2.02 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 Cu(1), and one Cu(2) atom. In the second O site, O(2) is bonded to two equivalent Ba(1), two equivalent Eu(1), and two equivalent Cu(1) atoms to form a mixture of distorted corner, face, and edge-sharing OBa2Eu2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-67°. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Li(1), two equivalent Ba(1), and three equivalent Cu(2) atoms. In the fourth O site, O(4) is bonded to two equivalent Ba(1), two equivalent Eu(1), and two equivalent Cu(1) atoms to form a mixture of distorted corner, face, and edge-sharing OBa2Eu2Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-67°.