NaDy(FeO3)4 crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded in a 4-coordinate geometry to two equivalent O(3) and two equivalent O(5) atoms. Dy(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(4), and four equivalent O(1) 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 24-37°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Dy(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 trigonal non-coplanar geometry to one Na(1) and two equivalent Fe(1) atoms. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Dy(1) and two equivalent Fe(1) atoms. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Na(1) and two equivalent Fe(1) atoms.
NaDy(FeO3)4 crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded in a 4-coordinate geometry to two equivalent O(3) and two equivalent O(5) atoms. Both Na(1)-O(3) bond lengths are 2.21 Å. Both Na(1)-O(5) bond lengths are 2.27 Å. Dy(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(4), and four equivalent O(1) atoms. Both Dy(1)-O(2) bond lengths are 2.42 Å. Both Dy(1)-O(4) bond lengths are 2.47 Å. All Dy(1)-O(1) bond lengths are 2.35 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 24-37°. The Fe(1)-O(2) bond length is 1.94 Å. The Fe(1)-O(3) bond length is 1.88 Å. The Fe(1)-O(4) bond length is 2.02 Å. The Fe(1)-O(5) bond length is 1.90 Å. There is one shorter (1.93 Å) and one longer (1.97 Å) Fe(1)-O(1) bond length. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Dy(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 trigonal non-coplanar geometry to one Na(1) and two equivalent Fe(1) atoms. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Dy(1) and two equivalent Fe(1) atoms. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Na(1) and two equivalent Fe(1) atoms.