Cs4CO4 crystallizes in the monoclinic C2 space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. In the second Cs site, Cs(2) is bonded in a 5-coordinate geometry to two equivalent O(1) and three equivalent O(2) atoms. C(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Cs(1), two equivalent Cs(2), and one C(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to two equivalent Cs(1), three equivalent Cs(2), and one C(1) atom.
Cs4CO4 crystallizes in the monoclinic C2 space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. There is one shorter (2.79 Å) and one longer (2.86 Å) Cs(1)-O(1) bond length. There is one shorter (3.14 Å) and one longer (3.25 Å) Cs(1)-O(2) bond length. In the second Cs site, Cs(2) is bonded in a 5-coordinate geometry to two equivalent O(1) and three equivalent O(2) atoms. There is one shorter (2.66 Å) and one longer (3.60 Å) Cs(2)-O(1) bond length. There are a spread of Cs(2)-O(2) bond distances ranging from 2.84-3.76 Å. C(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. Both C(1)-O(1) bond lengths are 1.45 Å. Both C(1)-O(2) bond lengths are 1.43 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Cs(1), two equivalent Cs(2), and one C(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to two equivalent Cs(1), three equivalent Cs(2), and one C(1) atom.