Li2Co(CO3)2 crystallizes in the monoclinic P2_1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(10), one O(2), one O(3), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Co(2)O5 square pyramid and  an edgeedge with one Co(1)O5 trigonal bipyramid. In the second Li site, Li(2) is bonded in a distorted rectangular see-saw-like geometry to one O(10), one O(4), one O(5), and one O(6) atom. In the third Li site, Li(3) is bonded in a 4-coordinate geometry to one O(11), one O(12), one O(6), and one O(9) atom. In the fourth Li site, Li(4) is bonded in a distorted see-saw-like geometry to one O(1), one O(11), one O(12), and one O(8) atom. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(10), one O(11), one O(2), one O(4), and one O(9) atom to form distorted CoO5 trigonal bipyramids that share  an edgeedge with one Li(1)O4 tetrahedra. In the second Co site, Co(2) is bonded to one O(1), one O(12), one O(3), one O(5), and one O(7) atom to form distorted CoO5 square pyramids that share  a cornercorner with one Li(1)O4 tetrahedra. There are four inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. In the second C site, C(2) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. In the third C site, C(3) is bonded in a trigonal planar geometry to one O(7), one O(8), and one O(9) atom. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one O(10), one O(11), and one O(12) atom. There are twelve 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 C(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Li(1), one Co(1), and one C(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(1), one Co(2), and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Li(2), one Co(1), and one C(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Li(2), one Co(2), and one C(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(2), one Li(3), and one C(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one C(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Li(1), one Li(4), and one C(3) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Li(3), one Co(1), and one C(3) atom. In the tenth O site, O(10) is bonded to one Li(1), one Li(2), one Co(1), and one C(4) atom to form distorted corner-sharing OLi2CoC trigonal pyramids. In the eleventh O site, O(11) is bonded to one Li(3), one Li(4), one Co(1), and one C(4) atom to form distorted corner-sharing OLi2CoC trigonal pyramids. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Li(3), one Li(4), one Co(2), and one C(4) atom.
Li2Co(CO3)2 crystallizes in the monoclinic P2_1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(10), one O(2), one O(3), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Co(2)O5 square pyramid and  an edgeedge with one Co(1)O5 trigonal bipyramid. The Li(1)-O(10) bond length is 2.03 Å. The Li(1)-O(2) bond length is 2.00 Å. The Li(1)-O(3) bond length is 1.97 Å. The Li(1)-O(8) bond length is 1.95 Å. In the second Li site, Li(2) is bonded in a distorted rectangular see-saw-like geometry to one O(10), one O(4), one O(5), and one O(6) atom. The Li(2)-O(10) bond length is 2.07 Å. The Li(2)-O(4) bond length is 1.95 Å. The Li(2)-O(5) bond length is 2.46 Å. The Li(2)-O(6) bond length is 1.96 Å. In the third Li site, Li(3) is bonded in a 4-coordinate geometry to one O(11), one O(12), one O(6), and one O(9) atom. The Li(3)-O(11) bond length is 2.18 Å. The Li(3)-O(12) bond length is 2.10 Å. The Li(3)-O(6) bond length is 1.91 Å. The Li(3)-O(9) bond length is 2.14 Å. In the fourth Li site, Li(4) is bonded in a distorted see-saw-like geometry to one O(1), one O(11), one O(12), and one O(8) atom. The Li(4)-O(1) bond length is 1.96 Å. The Li(4)-O(11) bond length is 2.06 Å. The Li(4)-O(12) bond length is 2.26 Å. The Li(4)-O(8) bond length is 1.94 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(10), one O(11), one O(2), one O(4), and one O(9) atom to form distorted CoO5 trigonal bipyramids that share  an edgeedge with one Li(1)O4 tetrahedra. The Co(1)-O(10) bond length is 2.09 Å. The Co(1)-O(11) bond length is 2.10 Å. The Co(1)-O(2) bond length is 2.13 Å. The Co(1)-O(4) bond length is 2.01 Å. The Co(1)-O(9) bond length is 1.99 Å. In the second Co site, Co(2) is bonded to one O(1), one O(12), one O(3), one O(5), and one O(7) atom to form distorted CoO5 square pyramids that share  a cornercorner with one Li(1)O4 tetrahedra. The Co(2)-O(1) bond length is 2.01 Å. The Co(2)-O(12) bond length is 2.21 Å. The Co(2)-O(3) bond length is 2.01 Å. The Co(2)-O(5) bond length is 2.03 Å. The Co(2)-O(7) bond length is 2.02 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The C(1)-O(1) bond length is 1.29 Å. The C(1)-O(2) bond length is 1.29 Å. The C(1)-O(3) bond length is 1.30 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. The C(2)-O(4) bond length is 1.31 Å. The C(2)-O(5) bond length is 1.30 Å. The C(2)-O(6) bond length is 1.28 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one O(7), one O(8), and one O(9) atom. The C(3)-O(7) bond length is 1.30 Å. The C(3)-O(8) bond length is 1.28 Å. The C(3)-O(9) bond length is 1.32 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one O(10), one O(11), and one O(12) atom. The C(4)-O(10) bond length is 1.30 Å. The C(4)-O(11) bond length is 1.31 Å. The C(4)-O(12) bond length is 1.29 Å. There are twelve 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 C(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Li(1), one Co(1), and one C(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(1), one Co(2), and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Li(2), one Co(1), and one C(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Li(2), one Co(2), and one C(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(2), one Li(3), and one C(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one C(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Li(1), one Li(4), and one C(3) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Li(3), one Co(1), and one C(3) atom. In the tenth O site, O(10) is bonded to one Li(1), one Li(2), one Co(1), and one C(4) atom to form distorted corner-sharing OLi2CoC trigonal pyramids. In the eleventh O site, O(11) is bonded to one Li(3), one Li(4), one Co(1), and one C(4) atom to form distorted corner-sharing OLi2CoC trigonal pyramids. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Li(3), one Li(4), one Co(2), and one C(4) atom.