SrCo2BPO7 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 9-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(7), two equivalent O(2), and two equivalent O(6) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom to form distorted CoO6 octahedra that share corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  an edgeedge with one Co(2)O6 octahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-63°. In the second Co site, Co(2) is bonded to one O(3), one O(4), one O(5), one O(7), and two equivalent O(1) atoms to form CoO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with three equivalent P(1)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-63°. B(1) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(7) atom. P(1) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra, corners with three equivalent Co(2)O6 octahedra, and  an edgeedge with one Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-60°. There are seven inequivalent O sites. In the first O site, O(4) is bonded in a 4-coordinate geometry to one Sr(1), one Co(1), one Co(2), and one B(1) atom. In the second O site, O(5) is bonded in a 4-coordinate geometry to one Sr(1), one Co(1), one Co(2), and one B(1) atom. In the third O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Sr(1), one Co(1), and one P(1) atom. In the fourth O site, O(7) is bonded in a distorted trigonal planar geometry to one Sr(1), one Co(1), one Co(2), and one B(1) atom. In the fifth O site, O(1) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Co(2), and one P(1) atom. In the sixth O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Sr(1), one Co(1), and one P(1) atom. In the seventh O site, O(3) is bonded in a 4-coordinate geometry to one Sr(1), one Co(1), one Co(2), and one P(1) atom.
SrCo2BPO7 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 9-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(7), two equivalent O(2), and two equivalent O(6) atoms. The Sr(1)-O(1) bond length is 2.72 Å. The Sr(1)-O(3) bond length is 2.76 Å. The Sr(1)-O(4) bond length is 2.56 Å. The Sr(1)-O(5) bond length is 2.52 Å. The Sr(1)-O(7) bond length is 3.08 Å. There is one shorter (2.60 Å) and one longer (2.65 Å) Sr(1)-O(2) bond length. There is one shorter (2.58 Å) and one longer (3.23 Å) Sr(1)-O(6) bond length. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom to form distorted CoO6 octahedra that share corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  an edgeedge with one Co(2)O6 octahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-63°. The Co(1)-O(2) bond length is 2.30 Å. The Co(1)-O(3) bond length is 2.16 Å. The Co(1)-O(4) bond length is 2.16 Å. The Co(1)-O(5) bond length is 2.08 Å. The Co(1)-O(6) bond length is 2.17 Å. The Co(1)-O(7) bond length is 2.04 Å. In the second Co site, Co(2) is bonded to one O(3), one O(4), one O(5), one O(7), and two equivalent O(1) atoms to form CoO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with three equivalent P(1)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-63°. The Co(2)-O(3) bond length is 2.14 Å. The Co(2)-O(4) bond length is 2.09 Å. The Co(2)-O(5) bond length is 2.23 Å. The Co(2)-O(7) bond length is 2.07 Å. There is one shorter (2.08 Å) and one longer (2.21 Å) Co(2)-O(1) bond length. B(1) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(7) atom. The B(1)-O(4) bond length is 1.39 Å. The B(1)-O(5) bond length is 1.39 Å. The B(1)-O(7) bond length is 1.38 Å. P(1) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra, corners with three equivalent Co(2)O6 octahedra, and  an edgeedge with one Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-60°. The P(1)-O(1) bond length is 1.56 Å. The P(1)-O(2) bond length is 1.56 Å. The P(1)-O(3) bond length is 1.57 Å. The P(1)-O(6) bond length is 1.54 Å. There are seven inequivalent O sites. In the first O site, O(4) is bonded in a 4-coordinate geometry to one Sr(1), one Co(1), one Co(2), and one B(1) atom. In the second O site, O(5) is bonded in a 4-coordinate geometry to one Sr(1), one Co(1), one Co(2), and one B(1) atom. In the third O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Sr(1), one Co(1), and one P(1) atom. In the fourth O site, O(7) is bonded in a distorted trigonal planar geometry to one Sr(1), one Co(1), one Co(2), and one B(1) atom. In the fifth O site, O(1) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Co(2), and one P(1) atom. In the sixth O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Sr(1), one Co(1), and one P(1) atom. In the seventh O site, O(3) is bonded in a 4-coordinate geometry to one Sr(1), one Co(1), one Co(2), and one P(1) atom.