NaVAsO5 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(5), two equivalent O(2), and two equivalent O(4) atoms. V(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form VO6 octahedra that share corners with two equivalent V(1)O6 octahedra and corners with four equivalent As(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 32°. As(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form AsO4 tetrahedra that share corners with four equivalent V(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-57°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Na(1), one V(1), and one As(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Na(1), one V(1), and one As(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Na(1) and two equivalent V(1) atoms. In the fourth O site, O(4) is bonded to two equivalent Na(1), one V(1), and one As(1) atom to form distorted edge-sharing ONa2VAs tetrahedra. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Na(1), one V(1), and one As(1) atom.
NaVAsO5 crystallizes in the monoclinic P2_1/c space group. Na(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(5), two equivalent O(2), and two equivalent O(4) atoms. The Na(1)-O(1) bond length is 2.46 Å. The Na(1)-O(3) bond length is 2.39 Å. The Na(1)-O(5) bond length is 2.53 Å. There is one shorter (2.45 Å) and one longer (2.77 Å) Na(1)-O(2) bond length. There is one shorter (2.47 Å) and one longer (2.52 Å) Na(1)-O(4) bond length. V(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form VO6 octahedra that share corners with two equivalent V(1)O6 octahedra and corners with four equivalent As(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 32°. The V(1)-O(1) bond length is 2.02 Å. The V(1)-O(2) bond length is 2.02 Å. The V(1)-O(4) bond length is 2.05 Å. The V(1)-O(5) bond length is 2.03 Å. There is one shorter (1.72 Å) and one longer (2.03 Å) V(1)-O(3) bond length. As(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form AsO4 tetrahedra that share corners with four equivalent V(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-57°. The As(1)-O(1) bond length is 1.72 Å. The As(1)-O(2) bond length is 1.73 Å. The As(1)-O(4) bond length is 1.73 Å. The As(1)-O(5) bond length is 1.72 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Na(1), one V(1), and one As(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Na(1), one V(1), and one As(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Na(1) and two equivalent V(1) atoms. In the fourth O site, O(4) is bonded to two equivalent Na(1), one V(1), and one As(1) atom to form distorted edge-sharing ONa2VAs tetrahedra. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Na(1), one V(1), and one As(1) atom.