EuHSO5 crystallizes in the monoclinic P2_1/c space group. Eu(1) is bonded in a 9-coordinate geometry to one O(3), one O(5), two equivalent O(1), two equivalent O(2), and three equivalent O(4) atoms. H(1) is bonded in a single-bond geometry to one O(4) atom. S(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(5) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Eu(1) and one S(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Eu(1) and one S(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Eu(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to three equivalent Eu(1) and one H(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Eu(1) and one S(1) atom.
EuHSO5 crystallizes in the monoclinic P2_1/c space group. Eu(1) is bonded in a 9-coordinate geometry to one O(3), one O(5), two equivalent O(1), two equivalent O(2), and three equivalent O(4) atoms. The Eu(1)-O(3) bond length is 2.34 Å. The Eu(1)-O(5) bond length is 2.50 Å. Both Eu(1)-O(1) bond lengths are 2.53 Å. There is one shorter (2.56 Å) and one longer (2.66 Å) Eu(1)-O(2) bond length. There are a spread of Eu(1)-O(4) bond distances ranging from 2.41-2.51 Å. H(1) is bonded in a single-bond geometry to one O(4) atom. The H(1)-O(4) bond length is 0.98 Å. S(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(5) atom. The S(1)-O(1) bond length is 1.50 Å. The S(1)-O(2) bond length is 1.48 Å. The S(1)-O(3) bond length is 1.46 Å. The S(1)-O(5) bond length is 1.45 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Eu(1) and one S(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Eu(1) and one S(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Eu(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to three equivalent Eu(1) and one H(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Eu(1) and one S(1) atom.