Na2MnCAsO7 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. Mn(1) is bonded to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form distorted MnO6 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(5), one O(6), and two equivalent O(4) atoms to form AsO4 tetrahedra that share corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-58°. 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 Mn(1), and one C(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Mn(1), and one C(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Mn(1), and one As(1) atom. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to two equivalent Na(1), one Mn(1), and one As(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to two equivalent Na(1), one Mn(1), and one As(1) atom.
Na2MnCAsO7 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 2.26 Å. The Na(1)-O(2) bond length is 2.48 Å. The Na(1)-O(3) bond length is 2.37 Å. The Na(1)-O(4) bond length is 2.52 Å. The Na(1)-O(5) bond length is 2.38 Å. The Na(1)-O(6) bond length is 2.83 Å. Mn(1) is bonded to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form distorted MnO6 octahedra that share corners with four equivalent As(1)O4 tetrahedra. The Mn(1)-O(2) bond length is 1.99 Å. The Mn(1)-O(3) bond length is 2.27 Å. The Mn(1)-O(5) bond length is 2.15 Å. The Mn(1)-O(6) bond length is 1.97 Å. Both Mn(1)-O(4) bond lengths are 2.04 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 1.25 Å. The C(1)-O(2) bond length is 1.34 Å. The C(1)-O(3) bond length is 1.30 Å. As(1) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form AsO4 tetrahedra that share corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-58°. The As(1)-O(5) bond length is 1.71 Å. The As(1)-O(6) bond length is 1.76 Å. Both As(1)-O(4) bond lengths are 1.71 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 Mn(1), and one C(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Mn(1), and one C(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Mn(1), and one As(1) atom. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to two equivalent Na(1), one Mn(1), and one As(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to two equivalent Na(1), one Mn(1), and one As(1) atom.