SrCo2(AsO4)2 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 6-coordinate geometry to one O(4), one O(5), one O(6), one O(7), and two equivalent O(8) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form CoO6 octahedra that share corners with two equivalent As(2)O4 tetrahedra and  an edgeedge with one Co(1)O6 octahedra. In the second Co site, Co(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(6) atom. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 3-coordinate geometry to one O(3), one O(4), and one O(7) atom. In the second As site, As(2) is bonded to one O(1), one O(5), one O(6), and one O(8) atom to form AsO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-66°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Co(1), one Co(2), and one As(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one O(7) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Co(2), two equivalent Co(1), and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted tetrahedral geometry to one Sr(1), one Co(1), one Co(2), and one As(1) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Sr(1), one Co(1), and one As(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Sr(1), one Co(2), and one As(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Sr(1), one As(1), and one O(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to two equivalent Sr(1) and one As(2) atom.
SrCo2(AsO4)2 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 6-coordinate geometry to one O(4), one O(5), one O(6), one O(7), and two equivalent O(8) atoms. The Sr(1)-O(4) bond length is 2.68 Å. The Sr(1)-O(5) bond length is 2.70 Å. The Sr(1)-O(6) bond length is 2.57 Å. The Sr(1)-O(7) bond length is 2.66 Å. There is one shorter (2.42 Å) and one longer (2.55 Å) Sr(1)-O(8) bond length. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form CoO6 octahedra that share corners with two equivalent As(2)O4 tetrahedra and  an edgeedge with one Co(1)O6 octahedra. The Co(1)-O(1) bond length is 2.08 Å. The Co(1)-O(2) bond length is 2.15 Å. The Co(1)-O(4) bond length is 2.11 Å. The Co(1)-O(5) bond length is 2.13 Å. There is one shorter (2.12 Å) and one longer (2.27 Å) Co(1)-O(3) bond length. In the second Co site, Co(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(6) atom. The Co(2)-O(1) bond length is 2.03 Å. The Co(2)-O(2) bond length is 1.97 Å. The Co(2)-O(3) bond length is 2.32 Å. The Co(2)-O(4) bond length is 2.03 Å. The Co(2)-O(6) bond length is 2.20 Å. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 3-coordinate geometry to one O(3), one O(4), and one O(7) atom. The As(1)-O(3) bond length is 1.78 Å. The As(1)-O(4) bond length is 1.81 Å. The As(1)-O(7) bond length is 1.86 Å. In the second As site, As(2) is bonded to one O(1), one O(5), one O(6), and one O(8) atom to form AsO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-66°. The As(2)-O(1) bond length is 1.73 Å. The As(2)-O(5) bond length is 1.73 Å. The As(2)-O(6) bond length is 1.74 Å. The As(2)-O(8) bond length is 1.72 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Co(1), one Co(2), and one As(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one O(7) atom. The O(2)-O(7) bond length is 1.49 Å. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Co(2), two equivalent Co(1), and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted tetrahedral geometry to one Sr(1), one Co(1), one Co(2), and one As(1) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Sr(1), one Co(1), and one As(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Sr(1), one Co(2), and one As(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Sr(1), one As(1), and one O(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to two equivalent Sr(1) and one As(2) atom.