CaDy(FeO3)4 crystallizes in the orthorhombic Amm2 space group. Ca(1) is bonded in a 10-coordinate geometry to two equivalent O(3), four equivalent O(1), and four equivalent O(5) atoms. Dy(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Fe(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 FeO6 octahedra. The corner-sharing octahedral tilt angles range from 13-29°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ca(1) and two equivalent Fe(1) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Dy(1) and two equivalent Fe(1) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Dy(1), and two equivalent Fe(1) atoms. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Dy(1) and two equivalent Fe(1) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Ca(1) and two equivalent Fe(1) atoms.
CaDy(FeO3)4 crystallizes in the orthorhombic Amm2 space group. Ca(1) is bonded in a 10-coordinate geometry to two equivalent O(3), four equivalent O(1), and four equivalent O(5) atoms. Both Ca(1)-O(3) bond lengths are 2.65 Å. All Ca(1)-O(1) bond lengths are 2.52 Å. There are two shorter (2.59 Å) and two longer (2.78 Å) Ca(1)-O(5) bond lengths. Dy(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Both Dy(1)-O(2) bond lengths are 2.34 Å. Both Dy(1)-O(3) bond lengths are 2.52 Å. Both Dy(1)-O(4) bond lengths are 2.30 Å. Fe(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 FeO6 octahedra. The corner-sharing octahedral tilt angles range from 13-29°. The Fe(1)-O(2) bond length is 1.90 Å. The Fe(1)-O(3) bond length is 1.93 Å. The Fe(1)-O(4) bond length is 1.93 Å. The Fe(1)-O(5) bond length is 1.90 Å. Both Fe(1)-O(1) bond lengths are 1.91 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ca(1) and two equivalent Fe(1) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Dy(1) and two equivalent Fe(1) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Dy(1), and two equivalent Fe(1) atoms. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Dy(1) and two equivalent Fe(1) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Ca(1) and two equivalent Fe(1) atoms.