Eu5Cd2Sb5O crystallizes in the orthorhombic Cmcm space group. There are four inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a distorted single-bond geometry to two equivalent Sb(3), three equivalent Sb(1), and one O(1) atom. In the second Eu site, Eu(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Sb(1), four equivalent Sb(2), and two equivalent O(1) atoms. In the third Eu site, Eu(3) is bonded in a 10-coordinate geometry to four equivalent Cd(1), two equivalent Sb(3), and four equivalent Sb(2) atoms. In the fourth Eu site, Eu(4) is bonded to two equivalent Sb(1) and four equivalent Sb(2) atoms to form edge-sharing EuSb6 octahedra. Cd(1) is bonded in a 4-coordinate geometry to two equivalent Eu(3), one Sb(2), one Sb(3), and two equivalent Sb(1) atoms. There are three inequivalent Sb sites. In the first Sb site, Sb(2) is bonded in a 8-coordinate geometry to two equivalent Eu(2), two equivalent Eu(3), two equivalent Eu(4), one Cd(1), and one Sb(2) atom. In the second Sb site, Sb(3) is bonded in a 8-coordinate geometry to two equivalent Eu(3), four equivalent Eu(1), and two equivalent Cd(1) atoms. In the third Sb site, Sb(1) is bonded in a 7-coordinate geometry to one Eu(2), one Eu(4), three equivalent Eu(1), and two equivalent Cd(1) atoms. O(1) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form corner-sharing OEu4 tetrahedra.
Eu5Cd2Sb5O crystallizes in the orthorhombic Cmcm space group. There are four inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a distorted single-bond geometry to two equivalent Sb(3), three equivalent Sb(1), and one O(1) atom. Both Eu(1)-Sb(3) bond lengths are 3.34 Å. There are two shorter (3.25 Å) and one longer (3.58 Å) Eu(1)-Sb(1) bond length. The Eu(1)-O(1) bond length is 2.30 Å. In the second Eu site, Eu(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Sb(1), four equivalent Sb(2), and two equivalent O(1) atoms. Both Eu(2)-Sb(1) bond lengths are 3.50 Å. All Eu(2)-Sb(2) bond lengths are 3.68 Å. Both Eu(2)-O(1) bond lengths are 2.61 Å. In the third Eu site, Eu(3) is bonded in a 10-coordinate geometry to four equivalent Cd(1), two equivalent Sb(3), and four equivalent Sb(2) atoms. All Eu(3)-Cd(1) bond lengths are 3.48 Å. Both Eu(3)-Sb(3) bond lengths are 3.39 Å. All Eu(3)-Sb(2) bond lengths are 3.44 Å. In the fourth Eu site, Eu(4) is bonded to two equivalent Sb(1) and four equivalent Sb(2) atoms to form edge-sharing EuSb6 octahedra. Both Eu(4)-Sb(1) bond lengths are 3.32 Å. All Eu(4)-Sb(2) bond lengths are 3.25 Å. Cd(1) is bonded in a 4-coordinate geometry to two equivalent Eu(3), one Sb(2), one Sb(3), and two equivalent Sb(1) atoms. The Cd(1)-Sb(2) bond length is 2.99 Å. The Cd(1)-Sb(3) bond length is 2.95 Å. Both Cd(1)-Sb(1) bond lengths are 2.88 Å. There are three inequivalent Sb sites. In the first Sb site, Sb(2) is bonded in a 8-coordinate geometry to two equivalent Eu(2), two equivalent Eu(3), two equivalent Eu(4), one Cd(1), and one Sb(2) atom. The Sb(2)-Sb(2) bond length is 2.93 Å. In the second Sb site, Sb(3) is bonded in a 8-coordinate geometry to two equivalent Eu(3), four equivalent Eu(1), and two equivalent Cd(1) atoms. In the third Sb site, Sb(1) is bonded in a 7-coordinate geometry to one Eu(2), one Eu(4), three equivalent Eu(1), and two equivalent Cd(1) atoms. O(1) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form corner-sharing OEu4 tetrahedra.