CaEu(SnO3)4 crystallizes in the orthorhombic Amm2 space group. Ca(1) is bonded in a 4-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Eu(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(5), and four equivalent O(1) atoms. Sn(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form corner-sharing SnO6 octahedra. The corner-sharing octahedral tilt angles range from 23-38°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Eu(1) and two equivalent Sn(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ca(1), one Eu(1), and two equivalent Sn(1) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ca(1) and two equivalent Sn(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1) and two equivalent Sn(1) atoms. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Eu(1) and two equivalent Sn(1) atoms.
CaEu(SnO3)4 crystallizes in the orthorhombic Amm2 space group. Ca(1) is bonded in a 4-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Both Ca(1)-O(2) bond lengths are 2.91 Å. Both Ca(1)-O(3) bond lengths are 2.30 Å. Both Ca(1)-O(4) bond lengths are 2.27 Å. Eu(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(5), and four equivalent O(1) atoms. Both Eu(1)-O(2) bond lengths are 2.59 Å. Both Eu(1)-O(5) bond lengths are 2.57 Å. All Eu(1)-O(1) bond lengths are 2.41 Å. Sn(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form corner-sharing SnO6 octahedra. The corner-sharing octahedral tilt angles range from 23-38°. The Sn(1)-O(2) bond length is 2.17 Å. The Sn(1)-O(3) bond length is 2.05 Å. The Sn(1)-O(4) bond length is 2.05 Å. The Sn(1)-O(5) bond length is 2.10 Å. Both Sn(1)-O(1) bond lengths are 2.08 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Eu(1) and two equivalent Sn(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ca(1), one Eu(1), and two equivalent Sn(1) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ca(1) and two equivalent Sn(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1) and two equivalent Sn(1) atoms. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Eu(1) and two equivalent Sn(1) atoms.