BaEuLaZnO5 crystallizes in the orthorhombic Fmmm space group. Ba(1) is bonded in a distorted q6 geometry to two equivalent O(3), four equivalent O(1), and four equivalent O(2) atoms. Eu(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. La(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Zn(1) is bonded in a distorted tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ba(1), one Eu(1), two equivalent La(1), and one Zn(1) atom to form distorted OBa2La2EuZn octahedra that share corners with four equivalent O(3)Ba2La2Eu2 octahedra, corners with four equivalent O(1)Ba2La2EuZn octahedra, corners with six equivalent O(2)Ba2LaEu2Zn octahedra, edges with two equivalent O(1)Ba2La2EuZn octahedra, edges with six equivalent O(2)Ba2LaEu2Zn octahedra, faces with two equivalent O(3)Ba2La2Eu2 octahedra, and faces with two equivalent O(1)Ba2La2EuZn octahedra. The corner-sharing octahedral tilt angles range from 32-62°. In the second O site, O(2) is bonded to two equivalent Ba(1), two equivalent Eu(1), one La(1), and one Zn(1) atom to form distorted OBa2LaEu2Zn octahedra that share corners with four equivalent O(3)Ba2La2Eu2 octahedra, corners with four equivalent O(2)Ba2LaEu2Zn octahedra, corners with six equivalent O(1)Ba2La2EuZn octahedra, edges with two equivalent O(2)Ba2LaEu2Zn octahedra, edges with six equivalent O(1)Ba2La2EuZn octahedra, faces with two equivalent O(3)Ba2La2Eu2 octahedra, and faces with two equivalent O(2)Ba2LaEu2Zn octahedra. The corner-sharing octahedral tilt angles range from 32-62°. In the third O site, O(3) is bonded to two equivalent Ba(1), two equivalent Eu(1), and two equivalent La(1) atoms to form OBa2La2Eu2 octahedra that share corners with six equivalent O(3)Ba2La2Eu2 octahedra, corners with eight equivalent O(1)Ba2La2EuZn octahedra, corners with eight equivalent O(2)Ba2LaEu2Zn octahedra, faces with four equivalent O(1)Ba2La2EuZn octahedra, and faces with four equivalent O(2)Ba2LaEu2Zn octahedra. The corner-sharing octahedral tilt angles range from 0-62°.
BaEuLaZnO5 crystallizes in the orthorhombic Fmmm space group. Ba(1) is bonded in a distorted q6 geometry to two equivalent O(3), four equivalent O(1), and four equivalent O(2) atoms. Both Ba(1)-O(3) bond lengths are 2.92 Å. All Ba(1)-O(1) bond lengths are 2.97 Å. All Ba(1)-O(2) bond lengths are 2.96 Å. Eu(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. Both Eu(1)-O(1) bond lengths are 2.31 Å. Both Eu(1)-O(3) bond lengths are 2.54 Å. All Eu(1)-O(2) bond lengths are 2.69 Å. La(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Both La(1)-O(2) bond lengths are 2.33 Å. Both La(1)-O(3) bond lengths are 2.52 Å. All La(1)-O(1) bond lengths are 2.70 Å. Zn(1) is bonded in a distorted tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Zn(1)-O(1) bond lengths are 1.98 Å. Both Zn(1)-O(2) bond lengths are 1.97 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ba(1), one Eu(1), two equivalent La(1), and one Zn(1) atom to form distorted OBa2La2EuZn octahedra that share corners with four equivalent O(3)Ba2La2Eu2 octahedra, corners with four equivalent O(1)Ba2La2EuZn octahedra, corners with six equivalent O(2)Ba2LaEu2Zn octahedra, edges with two equivalent O(1)Ba2La2EuZn octahedra, edges with six equivalent O(2)Ba2LaEu2Zn octahedra, faces with two equivalent O(3)Ba2La2Eu2 octahedra, and faces with two equivalent O(1)Ba2La2EuZn octahedra. The corner-sharing octahedral tilt angles range from 32-62°. In the second O site, O(2) is bonded to two equivalent Ba(1), two equivalent Eu(1), one La(1), and one Zn(1) atom to form distorted OBa2LaEu2Zn octahedra that share corners with four equivalent O(3)Ba2La2Eu2 octahedra, corners with four equivalent O(2)Ba2LaEu2Zn octahedra, corners with six equivalent O(1)Ba2La2EuZn octahedra, edges with two equivalent O(2)Ba2LaEu2Zn octahedra, edges with six equivalent O(1)Ba2La2EuZn octahedra, faces with two equivalent O(3)Ba2La2Eu2 octahedra, and faces with two equivalent O(2)Ba2LaEu2Zn octahedra. The corner-sharing octahedral tilt angles range from 32-62°. In the third O site, O(3) is bonded to two equivalent Ba(1), two equivalent Eu(1), and two equivalent La(1) atoms to form OBa2La2Eu2 octahedra that share corners with six equivalent O(3)Ba2La2Eu2 octahedra, corners with eight equivalent O(1)Ba2La2EuZn octahedra, corners with eight equivalent O(2)Ba2LaEu2Zn octahedra, faces with four equivalent O(1)Ba2La2EuZn octahedra, and faces with four equivalent O(2)Ba2LaEu2Zn octahedra. The corner-sharing octahedral tilt angles range from 0-62°.