CdH2(SO4)2 crystallizes in the monoclinic P2_1/c space group. Cd(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form CdO6 octahedra that share corners with three equivalent S(1)O4 tetrahedra and corners with three equivalent S(2)O4 tetrahedra. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(4) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) and one O(8) atom. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(2), one O(3), one O(6), and one O(7) atom to form SO4 tetrahedra that share corners with three equivalent Cd(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-57°. In the second S site, S(2) is bonded to one O(1), one O(4), one O(5), and one O(8) atom to form SO4 tetrahedra that share corners with three equivalent Cd(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-56°. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Cd(1) and one S(1) atom. In the second O site, O(8) is bonded in a 3-coordinate geometry to one Cd(1), one H(2), and one S(2) atom. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cd(1) and one S(2) atom. In the fourth O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Cd(1) and one S(1) atom. In the fifth O site, O(3) is bonded in a bent 120 degrees geometry to one Cd(1) and one S(1) atom. In the sixth O site, O(4) is bonded in a water-like geometry to one H(1) and one S(2) atom. In the seventh O site, O(5) is bonded in a bent 150 degrees geometry to one Cd(1) and one S(2) atom. In the eighth O site, O(6) is bonded in a bent 120 degrees geometry to one H(2) and one S(1) atom.
CdH2(SO4)2 crystallizes in the monoclinic P2_1/c space group. Cd(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form CdO6 octahedra that share corners with three equivalent S(1)O4 tetrahedra and corners with three equivalent S(2)O4 tetrahedra. The Cd(1)-O(1) bond length is 2.32 Å. The Cd(1)-O(2) bond length is 2.27 Å. The Cd(1)-O(3) bond length is 2.36 Å. The Cd(1)-O(5) bond length is 2.34 Å. The Cd(1)-O(7) bond length is 2.31 Å. The Cd(1)-O(8) bond length is 2.33 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(4) atom. The H(1)-O(4) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) and one O(8) atom. The H(2)-O(6) bond length is 1.00 Å. The H(2)-O(8) bond length is 1.76 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(2), one O(3), one O(6), and one O(7) atom to form SO4 tetrahedra that share corners with three equivalent Cd(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-57°. The S(1)-O(2) bond length is 1.47 Å. The S(1)-O(3) bond length is 1.48 Å. The S(1)-O(6) bond length is 1.58 Å. The S(1)-O(7) bond length is 1.47 Å. In the second S site, S(2) is bonded to one O(1), one O(4), one O(5), and one O(8) atom to form SO4 tetrahedra that share corners with three equivalent Cd(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-56°. The S(2)-O(1) bond length is 1.47 Å. The S(2)-O(4) bond length is 1.58 Å. The S(2)-O(5) bond length is 1.45 Å. The S(2)-O(8) bond length is 1.49 Å. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Cd(1) and one S(1) atom. In the second O site, O(8) is bonded in a 3-coordinate geometry to one Cd(1), one H(2), and one S(2) atom. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cd(1) and one S(2) atom. In the fourth O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Cd(1) and one S(1) atom. In the fifth O site, O(3) is bonded in a bent 120 degrees geometry to one Cd(1) and one S(1) atom. In the sixth O site, O(4) is bonded in a water-like geometry to one H(1) and one S(2) atom. In the seventh O site, O(5) is bonded in a bent 150 degrees geometry to one Cd(1) and one S(2) atom. In the eighth O site, O(6) is bonded in a bent 120 degrees geometry to one H(2) and one S(1) atom.