Na2DyCPO7 crystallizes in the monoclinic P2_1/m space group. Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. Dy(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. P(1) is bonded in a tetrahedral geometry to one O(5), one O(6), and two equivalent O(4) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Na(1) and one C(1) atom. In the second O site, O(2) is bonded to two equivalent Na(1), one Dy(1), and one C(1) atom to form distorted ONa2DyC trigonal pyramids that share corners with three equivalent O(6)Na2DyP tetrahedra and edges with two equivalent O(3)Na2DyC trigonal pyramids. In the third O site, O(3) is bonded to two equivalent Na(1), one Dy(1), and one C(1) atom to form distorted ONa2DyC trigonal pyramids that share corners with three equivalent O(6)Na2DyP tetrahedra and edges with two equivalent O(2)Na2DyC trigonal pyramids. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Dy(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to two equivalent Na(1), one Dy(1), and one P(1) atom. In the sixth O site, O(6) is bonded to two equivalent Na(1), one Dy(1), and one P(1) atom to form distorted corner-sharing ONa2DyP tetrahedra.
Na2DyCPO7 crystallizes in the monoclinic P2_1/m space group. Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. The Na(1)-O(1) bond length is 2.25 Å. The Na(1)-O(2) bond length is 2.36 Å. The Na(1)-O(3) bond length is 2.42 Å. The Na(1)-O(4) bond length is 2.58 Å. The Na(1)-O(5) bond length is 2.61 Å. The Na(1)-O(6) bond length is 2.69 Å. Dy(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms. The Dy(1)-O(2) bond length is 2.38 Å. The Dy(1)-O(3) bond length is 2.28 Å. The Dy(1)-O(5) bond length is 2.35 Å. The Dy(1)-O(6) bond length is 2.29 Å. Both Dy(1)-O(4) bond lengths are 2.25 Å. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(2) bond length is 1.32 Å. The C(1)-O(3) bond length is 1.33 Å. P(1) is bonded in a tetrahedral geometry to one O(5), one O(6), and two equivalent O(4) atoms. The P(1)-O(5) bond length is 1.58 Å. The P(1)-O(6) bond length is 1.56 Å. Both P(1)-O(4) bond lengths are 1.55 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Na(1) and one C(1) atom. In the second O site, O(2) is bonded to two equivalent Na(1), one Dy(1), and one C(1) atom to form distorted ONa2DyC trigonal pyramids that share corners with three equivalent O(6)Na2DyP tetrahedra and edges with two equivalent O(3)Na2DyC trigonal pyramids. In the third O site, O(3) is bonded to two equivalent Na(1), one Dy(1), and one C(1) atom to form distorted ONa2DyC trigonal pyramids that share corners with three equivalent O(6)Na2DyP tetrahedra and edges with two equivalent O(2)Na2DyC trigonal pyramids. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Dy(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to two equivalent Na(1), one Dy(1), and one P(1) atom. In the sixth O site, O(6) is bonded to two equivalent Na(1), one Dy(1), and one P(1) atom to form distorted corner-sharing ONa2DyP tetrahedra.