Na3Zn3As3O16 crystallizes in the trigonal R3c space group. Na(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and two equivalent O(6) atoms. Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with four equivalent As(1)O4 tetrahedra. As(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form AsO4 tetrahedra that share corners with four equivalent Zn(1)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(5) is bonded in a 6-coordinate geometry to three equivalent Na(1) and three equivalent O(6) atoms. In the second O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one O(5) atom. In the third O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(1) and one As(1) atom. In the fourth O site, O(2) is bonded in a trigonal planar geometry to one Na(1), one Zn(1), and one As(1) atom. In the fifth O site, O(3) is bonded in a trigonal planar geometry to one Na(1), one Zn(1), and one As(1) atom. In the sixth O site, O(4) is bonded in a trigonal planar geometry to one Na(1), one Zn(1), and one As(1) atom.
Na3Zn3As3O16 crystallizes in the trigonal R3c space group. Na(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and two equivalent O(6) atoms. The Na(1)-O(2) bond length is 2.31 Å. The Na(1)-O(3) bond length is 2.31 Å. The Na(1)-O(4) bond length is 2.28 Å. The Na(1)-O(5) bond length is 2.61 Å. There is one shorter (2.62 Å) and one longer (2.64 Å) Na(1)-O(6) bond length. Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share corners with four equivalent As(1)O4 tetrahedra. The Zn(1)-O(1) bond length is 1.94 Å. The Zn(1)-O(2) bond length is 1.99 Å. The Zn(1)-O(3) bond length is 1.98 Å. The Zn(1)-O(4) bond length is 1.96 Å. As(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form AsO4 tetrahedra that share corners with four equivalent Zn(1)O4 tetrahedra. The As(1)-O(1) bond length is 1.71 Å. The As(1)-O(2) bond length is 1.73 Å. The As(1)-O(3) bond length is 1.73 Å. The As(1)-O(4) bond length is 1.73 Å. There are six inequivalent O sites. In the first O site, O(5) is bonded in a 6-coordinate geometry to three equivalent Na(1) and three equivalent O(6) atoms. All O(5)-O(6) bond lengths are 1.76 Å. In the second O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one O(5) atom. In the third O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(1) and one As(1) atom. In the fourth O site, O(2) is bonded in a trigonal planar geometry to one Na(1), one Zn(1), and one As(1) atom. In the fifth O site, O(3) is bonded in a trigonal planar geometry to one Na(1), one Zn(1), and one As(1) atom. In the sixth O site, O(4) is bonded in a trigonal planar geometry to one Na(1), one Zn(1), and one As(1) atom.