RbSO4 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 10-coordinate geometry to one O(2), one O(3), one O(8), two equivalent O(4), two equivalent O(7), and three equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one O(7), one O(8), two equivalent O(3), two equivalent O(6), and three equivalent O(5) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the second S site, S(2) is bonded in a tetrahedral geometry to one O(5), one O(6), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a distorted single-bond geometry to three equivalent Rb(2) and one S(2) atom. In the second O site, O(6) is bonded in a single-bond geometry to two equivalent Rb(2) and one S(2) atom. In the third O site, O(7) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one S(2) atom. In the fourth O site, O(8) is bonded in a single-bond geometry to one Rb(1), one Rb(2), and one S(2) atom. In the fifth O site, O(1) is bonded in a distorted single-bond geometry to three equivalent Rb(1) and one S(1) atom. In the sixth O site, O(2) is bonded in a distorted single-bond geometry to one Rb(1) and one S(1) atom. In the seventh O site, O(3) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one S(1) atom. In the eighth O site, O(4) is bonded in a single-bond geometry to two equivalent Rb(1) and one S(1) atom.
RbSO4 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 10-coordinate geometry to one O(2), one O(3), one O(8), two equivalent O(4), two equivalent O(7), and three equivalent O(1) atoms. The Rb(1)-O(2) bond length is 3.02 Å. The Rb(1)-O(3) bond length is 3.15 Å. The Rb(1)-O(8) bond length is 3.09 Å. There is one shorter (3.14 Å) and one longer (3.28 Å) Rb(1)-O(4) bond length. There is one shorter (3.07 Å) and one longer (3.21 Å) Rb(1)-O(7) bond length. There are a spread of Rb(1)-O(1) bond distances ranging from 2.99-3.23 Å. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one O(7), one O(8), two equivalent O(3), two equivalent O(6), and three equivalent O(5) atoms. The Rb(2)-O(7) bond length is 3.18 Å. The Rb(2)-O(8) bond length is 3.15 Å. There is one shorter (3.08 Å) and one longer (3.11 Å) Rb(2)-O(3) bond length. There is one shorter (3.13 Å) and one longer (3.29 Å) Rb(2)-O(6) bond length. There are a spread of Rb(2)-O(5) bond distances ranging from 3.09-3.16 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. The S(1)-O(1) bond length is 1.47 Å. The S(1)-O(2) bond length is 1.51 Å. The S(1)-O(3) bond length is 1.47 Å. The S(1)-O(4) bond length is 1.51 Å. In the second S site, S(2) is bonded in a tetrahedral geometry to one O(5), one O(6), one O(7), and one O(8) atom. The S(2)-O(5) bond length is 1.48 Å. The S(2)-O(6) bond length is 1.50 Å. The S(2)-O(7) bond length is 1.49 Å. The S(2)-O(8) bond length is 1.50 Å. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a distorted single-bond geometry to three equivalent Rb(2) and one S(2) atom. In the second O site, O(6) is bonded in a single-bond geometry to two equivalent Rb(2) and one S(2) atom. In the third O site, O(7) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one S(2) atom. In the fourth O site, O(8) is bonded in a single-bond geometry to one Rb(1), one Rb(2), and one S(2) atom. In the fifth O site, O(1) is bonded in a distorted single-bond geometry to three equivalent Rb(1) and one S(1) atom. In the sixth O site, O(2) is bonded in a distorted single-bond geometry to one Rb(1) and one S(1) atom. In the seventh O site, O(3) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one S(1) atom. In the eighth O site, O(4) is bonded in a single-bond geometry to two equivalent Rb(1) and one S(1) atom.