K2SO4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to two equivalent O(2), three equivalent O(3), and four equivalent O(1) atoms. In the second K site, K(2) is bonded in a 10-coordinate geometry to one O(3), three equivalent O(2), and six equivalent O(1) atoms. S(1) is bonded in a tetrahedral geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1), three equivalent K(2), and one S(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1), three equivalent K(2), and one S(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(2), three equivalent K(1), and one S(1) atom.
K2SO4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to two equivalent O(2), three equivalent O(3), and four equivalent O(1) atoms. There is one shorter (2.72 Å) and one longer (2.78 Å) K(1)-O(2) bond length. There is one shorter (2.86 Å) and two longer (3.12 Å) K(1)-O(3) bond lengths. There are two shorter (2.71 Å) and two longer (2.78 Å) K(1)-O(1) bond lengths. In the second K site, K(2) is bonded in a 10-coordinate geometry to one O(3), three equivalent O(2), and six equivalent O(1) atoms. The K(2)-O(3) bond length is 2.70 Å. There are two shorter (2.89 Å) and one longer (3.10 Å) K(2)-O(2) bond length. There are a spread of K(2)-O(1) bond distances ranging from 2.91-3.07 Å. S(1) is bonded in a tetrahedral geometry to one O(2), one O(3), and two equivalent O(1) atoms. The S(1)-O(2) bond length is 1.49 Å. The S(1)-O(3) bond length is 1.47 Å. Both S(1)-O(1) bond lengths are 1.48 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1), three equivalent K(2), and one S(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1), three equivalent K(2), and one S(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(2), three equivalent K(1), and one S(1) atom.