K4Li(CO3)2 crystallizes in the monoclinic C2/m space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to two equivalent O(1) and three equivalent O(2) atoms. In the second K site, K(2) is bonded in a square co-planar geometry to four equivalent O(1) atoms. In the third K site, K(3) is bonded in a linear geometry to two equivalent O(2) atoms. Li(1) is bonded in a distorted rectangular see-saw-like geometry to four equivalent O(1) atoms. C(1) is bonded in a trigonal planar geometry to one O(2) and two equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one K(1), one K(2), one Li(1), and one C(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one K(3), three equivalent K(1), and one C(1) atom.
K4Li(CO3)2 crystallizes in the monoclinic C2/m space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to two equivalent O(1) and three equivalent O(2) atoms. Both K(1)-O(1) bond lengths are 2.75 Å. There is one shorter (2.77 Å) and two longer (3.06 Å) K(1)-O(2) bond lengths. In the second K site, K(2) is bonded in a square co-planar geometry to four equivalent O(1) atoms. All K(2)-O(1) bond lengths are 2.57 Å. In the third K site, K(3) is bonded in a linear geometry to two equivalent O(2) atoms. Both K(3)-O(2) bond lengths are 2.64 Å. Li(1) is bonded in a distorted rectangular see-saw-like geometry to four equivalent O(1) atoms. All Li(1)-O(1) bond lengths are 2.03 Å. C(1) is bonded in a trigonal planar geometry to one O(2) and two equivalent O(1) atoms. The C(1)-O(2) bond length is 1.29 Å. Both C(1)-O(1) bond lengths are 1.31 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one K(1), one K(2), one Li(1), and one C(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one K(3), three equivalent K(1), and one C(1) atom.