Ba2EuCoCu2O7 crystallizes in the orthorhombic Pmmm space group. Ba(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(4), and four equivalent O(2) atoms. Eu(1) is bonded in a body-centered cubic geometry to four equivalent O(1) and four equivalent O(3) atoms. Co(1) is bonded in a square co-planar geometry to two equivalent O(2) and two equivalent O(4) atoms. Cu(1) is bonded to one O(2), two equivalent O(1), and two equivalent O(3) atoms to form corner-sharing CuO5 square pyramids. There are four 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 to four equivalent Ba(1), one Co(1), and one Cu(1) atom to form a mixture of distorted corner and edge-sharing OBa4CoCu octahedra. The corner-sharing octahedral tilt angles range from 0-17°. In the third O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Eu(1), and two equivalent Cu(1) atoms. In the fourth O site, O(4) is bonded in a distorted linear geometry to four equivalent Ba(1) and two equivalent Co(1) atoms.
Ba2EuCoCu2O7 crystallizes in the orthorhombic Pmmm space group. Ba(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(4), and four equivalent O(2) atoms. Both Ba(1)-O(1) bond lengths are 2.98 Å. Both Ba(1)-O(3) bond lengths are 2.97 Å. Both Ba(1)-O(4) bond lengths are 2.96 Å. All Ba(1)-O(2) bond lengths are 2.80 Å. Eu(1) is bonded in a body-centered cubic geometry to four equivalent O(1) and four equivalent O(3) atoms. All Eu(1)-O(1) bond lengths are 2.49 Å. All Eu(1)-O(3) bond lengths are 2.48 Å. Co(1) is bonded in a square co-planar geometry to two equivalent O(2) and two equivalent O(4) atoms. Both Co(1)-O(2) bond lengths are 1.80 Å. Both Co(1)-O(4) bond lengths are 1.96 Å. Cu(1) is bonded to one O(2), two equivalent O(1), and two equivalent O(3) atoms to form corner-sharing CuO5 square pyramids. The Cu(1)-O(2) bond length is 2.49 Å. Both Cu(1)-O(1) bond lengths are 1.96 Å. Both Cu(1)-O(3) bond lengths are 1.97 Å. There are four 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 to four equivalent Ba(1), one Co(1), and one Cu(1) atom to form a mixture of distorted corner and edge-sharing OBa4CoCu octahedra. The corner-sharing octahedral tilt angles range from 0-17°. In the third O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Eu(1), and two equivalent Cu(1) atoms. In the fourth O site, O(4) is bonded in a distorted linear geometry to four equivalent Ba(1) and two equivalent Co(1) atoms.