Li2Co3(P2O7)2 crystallizes in the triclinic P-1 space group. Li(1) is bonded to one O(1), one O(4), one O(5), and one O(6) atom to form distorted LiO4 trigonal pyramids that share corners with three equivalent Co(1)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-71°. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(3), one O(5), one O(6), and two equivalent O(7) atoms to form CoO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, corners with three equivalent Li(1)O4 trigonal pyramids,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Co(2)O6 octahedra. In the second Co site, Co(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Li(1)O4 trigonal pyramids. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(4), one O(5), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra, corners with three equivalent Co(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent Li(1)O4 trigonal pyramids. The corner-sharing octahedral tilt angles range from 52-64°. 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(2)O6 octahedra, corners with three equivalent Co(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and corners with two equivalent Li(1)O4 trigonal pyramids. The corner-sharing octahedral tilt angles range from 49-64°. There are seven inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Co(1), one Co(2), and one P(2) atom to form distorted corner-sharing OLiCo2P tetrahedra. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one P(1) and one P(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one P(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one Co(2), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(1), one Co(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(1), one Co(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to two equivalent Co(1) and one P(1) atom.
Li2Co3(P2O7)2 crystallizes in the triclinic P-1 space group. Li(1) is bonded to one O(1), one O(4), one O(5), and one O(6) atom to form distorted LiO4 trigonal pyramids that share corners with three equivalent Co(1)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-71°. The Li(1)-O(1) bond length is 2.07 Å. The Li(1)-O(4) bond length is 2.02 Å. The Li(1)-O(5) bond length is 2.07 Å. The Li(1)-O(6) bond length is 2.05 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(3), one O(5), one O(6), and two equivalent O(7) atoms to form CoO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, corners with three equivalent Li(1)O4 trigonal pyramids,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Co(2)O6 octahedra. The Co(1)-O(1) bond length is 2.37 Å. The Co(1)-O(3) bond length is 2.31 Å. The Co(1)-O(5) bond length is 2.15 Å. The Co(1)-O(6) bond length is 2.19 Å. There is one shorter (2.07 Å) and one longer (2.08 Å) Co(1)-O(7) bond length. In the second Co site, Co(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Li(1)O4 trigonal pyramids. Both Co(2)-O(1) bond lengths are 2.20 Å. Both Co(2)-O(3) bond lengths are 2.12 Å. Both Co(2)-O(4) bond lengths are 2.24 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(4), one O(5), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra, corners with three equivalent Co(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent Li(1)O4 trigonal pyramids. The corner-sharing octahedral tilt angles range from 52-64°. The P(1)-O(2) bond length is 1.62 Å. The P(1)-O(4) bond length is 1.52 Å. The P(1)-O(5) bond length is 1.53 Å. The P(1)-O(7) bond length is 1.55 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(2)O6 octahedra, corners with three equivalent Co(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and corners with two equivalent Li(1)O4 trigonal pyramids. The corner-sharing octahedral tilt angles range from 49-64°. The P(2)-O(1) bond length is 1.55 Å. The P(2)-O(2) bond length is 1.59 Å. The P(2)-O(3) bond length is 1.55 Å. The P(2)-O(6) bond length is 1.52 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Co(1), one Co(2), and one P(2) atom to form distorted corner-sharing OLiCo2P tetrahedra. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one P(1) and one P(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one P(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one Co(2), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(1), one Co(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(1), one Co(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to two equivalent Co(1) and one P(1) atom.