Li2CoP2O7 crystallizes in the triclinic P1 space group. There are eight inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(19), one O(24), one O(28), and one O(5) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra, and  a cornercorner with one P(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 33°. In the second Li site, Li(2) is bonded in a 6-coordinate geometry to one O(13), one O(24), one O(27), one O(28), one O(4), and one O(7) atom. In the third Li site, Li(3) is bonded in a 5-coordinate geometry to one O(16), one O(17), one O(20), one O(3), and one O(6) atom. In the fourth Li site, Li(4) is bonded in a 5-coordinate geometry to one O(1), one O(16), one O(2), one O(21), and one O(3) atom. In the fifth Li site, Li(5) is bonded in a T-shaped geometry to one O(26), one O(4), and one O(9) atom. In the sixth Li site, Li(6) is bonded in a distorted see-saw-like geometry to one O(14), one O(19), one O(28), and one O(7) atom. In the seventh Li site, Li(7) is bonded in a trigonal non-coplanar geometry to one O(23), one O(24), and one O(7) atom. In the eighth Li site, Li(8) is bonded in a 4-coordinate geometry to one O(10), one O(15), one O(8), and one O(9) atom. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(12), one O(2), one O(20), one O(21), one O(22), and one O(23) atom to form CoO6 octahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and corners with two equivalent P(8)O4 tetrahedra. In the second Co site, Co(2) is bonded to one O(1), one O(13), one O(16), one O(25), one O(27), and one O(3) atom to form CoO6 octahedra that share  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 63°. In the third Co site, Co(3) is bonded to one O(10), one O(14), one O(15), one O(19), one O(25), and one O(26) atom to form distorted CoO6 octahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid, and  an edgeedge with one P(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 63°. In the fourth Co site, Co(4) is bonded in a 6-coordinate geometry to one O(12), one O(28), one O(4), one O(5), one O(8), and one O(9) atom. There are eight inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(10), one O(18), and one O(27) atom to form PO4 tetrahedra that share  a cornercorner with one Co(3)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 41-57°. In the second P site, P(2) is bonded to one O(16), one O(26), one O(5), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one P(6)O4 tetrahedra, and  a cornercorner with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 44-47°. In the third P site, P(3) is bonded to one O(12), one O(13), one O(18), and one O(28) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 56-57°. In the fourth P site, P(4) is bonded to one O(15), one O(17), one O(3), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra, and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-52°. In the fifth P site, P(5) is bonded to one O(14), one O(17), one O(2), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 40-58°. In the sixth P site, P(6) is bonded to one O(21), one O(24), one O(6), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles are 50°. In the seventh P site, P(7) is bonded to one O(11), one O(19), one O(23), and one O(25) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one P(8)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid, and  an edgeedge with one Co(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-57°. In the eighth P site, P(8) is bonded to one O(11), one O(20), one O(22), and one O(4) atom to form PO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and  a cornercorner with one P(7)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-59°. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Li(4), one Co(2), and one P(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Li(4), one Co(1), and one P(5) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Li(3), one Li(4), one Co(2), and one P(4) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Li(2), one Li(5), one Co(4), and one P(8) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Li(1), one Co(4), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(3), one P(2), and one P(6) atom. In the seventh O site, O(7) is bonded in a distorted trigonal pyramidal geometry to one Li(2), one Li(6), one Li(7), and one P(4) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Li(8), one Co(4), and one P(5) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Li(5), one Li(8), one Co(4), and one P(6) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Li(8), one Co(3), and one P(1) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one P(7) and one P(8) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Co(1), one Co(4), and one P(3) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Li(2), one Co(2), and one P(3) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Li(6), one Co(3), and one P(5) atom. In the fifteenth O site, O(15) is bonded in a 3-coordinate geometry to one Li(8), one Co(3), and one P(4) atom. In the sixteenth O site, O(16) is bonded in a distorted rectangular see-saw-like geometry to one Li(3), one Li(4), one Co(2), and one P(2) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal planar geometry to one Li(3), one P(4), and one P(5) atom. In the eighteenth O site, O(18) is bonded in a bent 120 degrees geometry to one P(1) and one P(3) atom. In the nineteenth O site, O(19) is bonded in a 4-coordinate geometry to one Li(1), one Li(6), one Co(3), and one P(7) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal planar geometry to one Li(3), one Co(1), and one P(8) atom. In the twenty-first O site, O(21) is bonded in a distorted trigonal planar geometry to one Li(4), one Co(1), and one P(6) atom. In the twenty-second O site, O(22) is bonded in a bent 150 degrees geometry to one Co(1) and one P(8) atom. In the twenty-third O site, O(23) is bonded in a distorted trigonal planar geometry to one Li(7), one Co(1), and one P(7) atom. In the twenty-fourth O site, O(24) is bonded in a 3-coordinate geometry to one Li(1), one Li(2), one Li(7), and one P(6) atom. In the twenty-fifth O site, O(25) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(3), and one P(7) atom. In the twenty-sixth O site, O(26) is bonded in a distorted trigonal planar geometry to one Li(5), one Co(3), and one P(2) atom. In the twenty-seventh O site, O(27) is bonded in a 3-coordinate geometry to one Li(2), one Co(2), and one P(1) atom. In the twenty-eighth O site, O(28) is bonded in a 3-coordinate geometry to one Li(1), one Li(2), one Li(6), one Co(4), and one P(3) atom.
Li2CoP2O7 crystallizes in the triclinic P1 space group. There are eight inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(19), one O(24), one O(28), and one O(5) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra, and  a cornercorner with one P(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 33°. The Li(1)-O(19) bond length is 2.02 Å. The Li(1)-O(24) bond length is 2.04 Å. The Li(1)-O(28) bond length is 2.15 Å. The Li(1)-O(5) bond length is 1.97 Å. In the second Li site, Li(2) is bonded in a 6-coordinate geometry to one O(13), one O(24), one O(27), one O(28), one O(4), and one O(7) atom. The Li(2)-O(13) bond length is 1.97 Å. The Li(2)-O(24) bond length is 2.64 Å. The Li(2)-O(27) bond length is 2.32 Å. The Li(2)-O(28) bond length is 2.65 Å. The Li(2)-O(4) bond length is 2.61 Å. The Li(2)-O(7) bond length is 2.03 Å. In the third Li site, Li(3) is bonded in a 5-coordinate geometry to one O(16), one O(17), one O(20), one O(3), and one O(6) atom. The Li(3)-O(16) bond length is 2.16 Å. The Li(3)-O(17) bond length is 2.06 Å. The Li(3)-O(20) bond length is 2.02 Å. The Li(3)-O(3) bond length is 2.39 Å. The Li(3)-O(6) bond length is 2.12 Å. In the fourth Li site, Li(4) is bonded in a 5-coordinate geometry to one O(1), one O(16), one O(2), one O(21), and one O(3) atom. The Li(4)-O(1) bond length is 1.98 Å. The Li(4)-O(16) bond length is 2.18 Å. The Li(4)-O(2) bond length is 2.07 Å. The Li(4)-O(21) bond length is 2.06 Å. The Li(4)-O(3) bond length is 2.36 Å. In the fifth Li site, Li(5) is bonded in a T-shaped geometry to one O(26), one O(4), and one O(9) atom. The Li(5)-O(26) bond length is 2.14 Å. The Li(5)-O(4) bond length is 2.07 Å. The Li(5)-O(9) bond length is 2.05 Å. In the sixth Li site, Li(6) is bonded in a distorted see-saw-like geometry to one O(14), one O(19), one O(28), and one O(7) atom. The Li(6)-O(14) bond length is 1.93 Å. The Li(6)-O(19) bond length is 2.15 Å. The Li(6)-O(28) bond length is 2.01 Å. The Li(6)-O(7) bond length is 2.08 Å. In the seventh Li site, Li(7) is bonded in a trigonal non-coplanar geometry to one O(23), one O(24), and one O(7) atom. The Li(7)-O(23) bond length is 1.98 Å. The Li(7)-O(24) bond length is 1.98 Å. The Li(7)-O(7) bond length is 2.24 Å. In the eighth Li site, Li(8) is bonded in a 4-coordinate geometry to one O(10), one O(15), one O(8), and one O(9) atom. The Li(8)-O(10) bond length is 2.07 Å. The Li(8)-O(15) bond length is 2.01 Å. The Li(8)-O(8) bond length is 2.08 Å. The Li(8)-O(9) bond length is 2.43 Å. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(12), one O(2), one O(20), one O(21), one O(22), and one O(23) atom to form CoO6 octahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and corners with two equivalent P(8)O4 tetrahedra. The Co(1)-O(12) bond length is 2.20 Å. The Co(1)-O(2) bond length is 2.08 Å. The Co(1)-O(20) bond length is 2.21 Å. The Co(1)-O(21) bond length is 2.07 Å. The Co(1)-O(22) bond length is 2.08 Å. The Co(1)-O(23) bond length is 2.15 Å. In the second Co site, Co(2) is bonded to one O(1), one O(13), one O(16), one O(25), one O(27), and one O(3) atom to form CoO6 octahedra that share  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 63°. The Co(2)-O(1) bond length is 2.18 Å. The Co(2)-O(13) bond length is 2.13 Å. The Co(2)-O(16) bond length is 2.12 Å. The Co(2)-O(25) bond length is 2.16 Å. The Co(2)-O(27) bond length is 2.09 Å. The Co(2)-O(3) bond length is 2.09 Å. In the third Co site, Co(3) is bonded to one O(10), one O(14), one O(15), one O(19), one O(25), and one O(26) atom to form distorted CoO6 octahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid, and  an edgeedge with one P(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 63°. The Co(3)-O(10) bond length is 2.11 Å. The Co(3)-O(14) bond length is 2.04 Å. The Co(3)-O(15) bond length is 2.05 Å. The Co(3)-O(19) bond length is 2.44 Å. The Co(3)-O(25) bond length is 2.10 Å. The Co(3)-O(26) bond length is 2.08 Å. In the fourth Co site, Co(4) is bonded in a 6-coordinate geometry to one O(12), one O(28), one O(4), one O(5), one O(8), and one O(9) atom. The Co(4)-O(12) bond length is 2.15 Å. The Co(4)-O(28) bond length is 2.48 Å. The Co(4)-O(4) bond length is 2.07 Å. The Co(4)-O(5) bond length is 2.03 Å. The Co(4)-O(8) bond length is 2.05 Å. The Co(4)-O(9) bond length is 2.12 Å. There are eight inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(10), one O(18), and one O(27) atom to form PO4 tetrahedra that share  a cornercorner with one Co(3)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 41-57°. The P(1)-O(1) bond length is 1.54 Å. The P(1)-O(10) bond length is 1.54 Å. The P(1)-O(18) bond length is 1.63 Å. The P(1)-O(27) bond length is 1.52 Å. In the second P site, P(2) is bonded to one O(16), one O(26), one O(5), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one P(6)O4 tetrahedra, and  a cornercorner with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 44-47°. The P(2)-O(16) bond length is 1.52 Å. The P(2)-O(26) bond length is 1.53 Å. The P(2)-O(5) bond length is 1.53 Å. The P(2)-O(6) bond length is 1.64 Å. In the third P site, P(3) is bonded to one O(12), one O(13), one O(18), and one O(28) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 56-57°. The P(3)-O(12) bond length is 1.56 Å. The P(3)-O(13) bond length is 1.52 Å. The P(3)-O(18) bond length is 1.60 Å. The P(3)-O(28) bond length is 1.55 Å. In the fourth P site, P(4) is bonded to one O(15), one O(17), one O(3), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra, and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-52°. The P(4)-O(15) bond length is 1.53 Å. The P(4)-O(17) bond length is 1.66 Å. The P(4)-O(3) bond length is 1.52 Å. The P(4)-O(7) bond length is 1.54 Å. In the fifth P site, P(5) is bonded to one O(14), one O(17), one O(2), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 40-58°. The P(5)-O(14) bond length is 1.53 Å. The P(5)-O(17) bond length is 1.65 Å. The P(5)-O(2) bond length is 1.51 Å. The P(5)-O(8) bond length is 1.53 Å. In the sixth P site, P(6) is bonded to one O(21), one O(24), one O(6), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one Li(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles are 50°. The P(6)-O(21) bond length is 1.52 Å. The P(6)-O(24) bond length is 1.53 Å. The P(6)-O(6) bond length is 1.66 Å. The P(6)-O(9) bond length is 1.54 Å. In the seventh P site, P(7) is bonded to one O(11), one O(19), one O(23), and one O(25) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one P(8)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid, and  an edgeedge with one Co(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-57°. The P(7)-O(11) bond length is 1.60 Å. The P(7)-O(19) bond length is 1.55 Å. The P(7)-O(23) bond length is 1.52 Å. The P(7)-O(25) bond length is 1.56 Å. In the eighth P site, P(8) is bonded to one O(11), one O(20), one O(22), and one O(4) atom to form PO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and  a cornercorner with one P(7)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-59°. The P(8)-O(11) bond length is 1.62 Å. The P(8)-O(20) bond length is 1.54 Å. The P(8)-O(22) bond length is 1.51 Å. The P(8)-O(4) bond length is 1.55 Å. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Li(4), one Co(2), and one P(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Li(4), one Co(1), and one P(5) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Li(3), one Li(4), one Co(2), and one P(4) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Li(2), one Li(5), one Co(4), and one P(8) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Li(1), one Co(4), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(3), one P(2), and one P(6) atom. In the seventh O site, O(7) is bonded in a distorted trigonal pyramidal geometry to one Li(2), one Li(6), one Li(7), and one P(4) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Li(8), one Co(4), and one P(5) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Li(5), one Li(8), one Co(4), and one P(6) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Li(8), one Co(3), and one P(1) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one P(7) and one P(8) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Co(1), one Co(4), and one P(3) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Li(2), one Co(2), and one P(3) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Li(6), one Co(3), and one P(5) atom. In the fifteenth O site, O(15) is bonded in a 3-coordinate geometry to one Li(8), one Co(3), and one P(4) atom. In the sixteenth O site, O(16) is bonded in a distorted rectangular see-saw-like geometry to one Li(3), one Li(4), one Co(2), and one P(2) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal planar geometry to one Li(3), one P(4), and one P(5) atom. In the eighteenth O site, O(18) is bonded in a bent 120 degrees geometry to one P(1) and one P(3) atom. In the nineteenth O site, O(19) is bonded in a 4-coordinate geometry to one Li(1), one Li(6), one Co(3), and one P(7) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal planar geometry to one Li(3), one Co(1), and one P(8) atom. In the twenty-first O site, O(21) is bonded in a distorted trigonal planar geometry to one Li(4), one Co(1), and one P(6) atom. In the twenty-second O site, O(22) is bonded in a bent 150 degrees geometry to one Co(1) and one P(8) atom. In the twenty-third O site, O(23) is bonded in a distorted trigonal planar geometry to one Li(7), one Co(1), and one P(7) atom. In the twenty-fourth O site, O(24) is bonded in a 3-coordinate geometry to one Li(1), one Li(2), one Li(7), and one P(6) atom. In the twenty-fifth O site, O(25) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(3), and one P(7) atom. In the twenty-sixth O site, O(26) is bonded in a distorted trigonal planar geometry to one Li(5), one Co(3), and one P(2) atom. In the twenty-seventh O site, O(27) is bonded in a 3-coordinate geometry to one Li(2), one Co(2), and one P(1) atom. In the twenty-eighth O site, O(28) is bonded in a 3-coordinate geometry to one Li(1), one Li(2), one Li(6), one Co(4), and one P(3) atom.