Co3AgP3(HO6)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms to form CoO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, and edges with two equivalent Co(2)O6 octahedra. In the second Co site, Co(2) is bonded to one O(3), one O(4), one O(5), one O(6), and two equivalent O(1) atoms to form CoO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Co(2)O6 octahedra. Ag(1) is bonded in a 4-coordinate geometry to four equivalent O(3) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to two equivalent O(4) and two equivalent O(5) atoms to form PO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and corners with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-57°. In the second P site, P(2) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and corners with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-56°. H(1) is bonded in a linear geometry to one O(2) and one O(4) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Co(2) and one P(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Co(1), one P(2), and one H(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Co(2), two equivalent Ag(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Co(2), one P(1), and one H(1) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one P(2) atom.
Co3AgP3(HO6)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms to form CoO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, and edges with two equivalent Co(2)O6 octahedra. Both Co(1)-O(2) bond lengths are 2.21 Å. Both Co(1)-O(5) bond lengths are 2.15 Å. Both Co(1)-O(6) bond lengths are 2.16 Å. In the second Co site, Co(2) is bonded to one O(3), one O(4), one O(5), one O(6), and two equivalent O(1) atoms to form CoO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Co(2)O6 octahedra. The Co(2)-O(3) bond length is 2.06 Å. The Co(2)-O(4) bond length is 2.13 Å. The Co(2)-O(5) bond length is 2.20 Å. The Co(2)-O(6) bond length is 2.11 Å. There is one shorter (2.08 Å) and one longer (2.14 Å) Co(2)-O(1) bond length. Ag(1) is bonded in a 4-coordinate geometry to four equivalent O(3) atoms. There are two shorter (2.41 Å) and two longer (2.56 Å) Ag(1)-O(3) bond lengths. There are two inequivalent P sites. In the first P site, P(1) is bonded to two equivalent O(4) and two equivalent O(5) atoms to form PO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and corners with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-57°. Both P(1)-O(4) bond lengths are 1.55 Å. Both P(1)-O(5) bond lengths are 1.57 Å. In the second P site, P(2) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and corners with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-56°. The P(2)-O(1) bond length is 1.54 Å. The P(2)-O(2) bond length is 1.61 Å. The P(2)-O(3) bond length is 1.55 Å. The P(2)-O(6) bond length is 1.54 Å. H(1) is bonded in a linear geometry to one O(2) and one O(4) atom. The H(1)-O(2) bond length is 1.08 Å. The H(1)-O(4) bond length is 1.40 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Co(2) and one P(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Co(1), one P(2), and one H(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Co(2), two equivalent Ag(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Co(2), one P(1), and one H(1) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one P(2) atom.