Co2(AsO4)Cl crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent Cl(1) atoms to form distorted CoCl2O4 octahedra that share corners with four equivalent As(1)O4 tetrahedra and edges with two equivalent Co(1)Cl2O4 octahedra. In the second Co site, Co(2) is bonded in a 6-coordinate geometry to one O(2), one O(3), two equivalent O(1), and two equivalent Cl(1) atoms. As(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form AsO4 tetrahedra that share corners with four equivalent Co(1)Cl2O4 octahedra. The corner-sharing octahedral tilt angles range from 50-56°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one As(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Co(2) and one As(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Co(2), two equivalent Co(1), and one As(1) atom. Cl(1) is bonded to two equivalent Co(1) and two equivalent Co(2) atoms to form distorted corner-sharing ClCo4 tetrahedra.
Co2(AsO4)Cl crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent Cl(1) atoms to form distorted CoCl2O4 octahedra that share corners with four equivalent As(1)O4 tetrahedra and edges with two equivalent Co(1)Cl2O4 octahedra. Both Co(1)-O(1) bond lengths are 2.07 Å. Both Co(1)-O(3) bond lengths are 2.12 Å. Both Co(1)-Cl(1) bond lengths are 2.49 Å. In the second Co site, Co(2) is bonded in a 6-coordinate geometry to one O(2), one O(3), two equivalent O(1), and two equivalent Cl(1) atoms. The Co(2)-O(2) bond length is 1.94 Å. The Co(2)-O(3) bond length is 2.37 Å. Both Co(2)-O(1) bond lengths are 2.04 Å. There is one shorter (2.44 Å) and one longer (2.58 Å) Co(2)-Cl(1) bond length. As(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form AsO4 tetrahedra that share corners with four equivalent Co(1)Cl2O4 octahedra. The corner-sharing octahedral tilt angles range from 50-56°. The As(1)-O(2) bond length is 1.68 Å. The As(1)-O(3) bond length is 1.77 Å. Both As(1)-O(1) bond lengths are 1.74 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one As(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Co(2) and one As(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Co(2), two equivalent Co(1), and one As(1) atom. Cl(1) is bonded to two equivalent Co(1) and two equivalent Co(2) atoms to form distorted corner-sharing ClCo4 tetrahedra.