Na2VCAsO7 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. V(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(6) atoms to form VO6 octahedra that share corners with four equivalent As(1)O4 tetrahedra. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. As(1) is bonded to one O(4), one O(5), and two equivalent O(6) atoms to form AsO4 tetrahedra that share corners with four equivalent V(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-56°. 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 in a distorted rectangular see-saw-like geometry to two equivalent Na(1), one V(1), and one C(1) atom. In the third O site, O(3) is bonded in a distorted tetrahedral geometry to two equivalent Na(1), one V(1), and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(1), one V(1), and one As(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Na(1), one V(1), and one As(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Na(1), one V(1), and one As(1) atom.
Na2VCAsO7 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 2.27 Å. The Na(1)-O(2) bond length is 2.44 Å. The Na(1)-O(3) bond length is 2.37 Å. The Na(1)-O(4) bond length is 2.49 Å. The Na(1)-O(5) bond length is 2.86 Å. The Na(1)-O(6) bond length is 2.54 Å. V(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(6) atoms to form VO6 octahedra that share corners with four equivalent As(1)O4 tetrahedra. The V(1)-O(2) bond length is 2.09 Å. The V(1)-O(3) bond length is 2.07 Å. The V(1)-O(4) bond length is 2.02 Å. The V(1)-O(5) bond length is 2.10 Å. Both V(1)-O(6) bond lengths are 2.02 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. As(1) is bonded to one O(4), one O(5), and two equivalent O(6) atoms to form AsO4 tetrahedra that share corners with four equivalent V(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-56°. The As(1)-O(4) bond length is 1.73 Å. The As(1)-O(5) bond length is 1.73 Å. Both As(1)-O(6) bond lengths are 1.72 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 in a distorted rectangular see-saw-like geometry to two equivalent Na(1), one V(1), and one C(1) atom. In the third O site, O(3) is bonded in a distorted tetrahedral geometry to two equivalent Na(1), one V(1), and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(1), one V(1), and one As(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Na(1), one V(1), and one As(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Na(1), one V(1), and one As(1) atom.