Sr(OH)2 crystallizes in the orthorhombic Pmc2_1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one H(1), one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one H(2), one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one Sr(1) and one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one Sr(2) and one O(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Sr(1), two equivalent Sr(2), and one H(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one Sr(2), two equivalent Sr(1), and one H(2) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Sr(1), two equivalent Sr(2), and one H(3) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one Sr(2), two equivalent Sr(1), and one H(4) atom.
Sr(OH)2 crystallizes in the orthorhombic Pmc2_1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one H(1), one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms. The Sr(1)-H(1) bond length is 2.57 Å. The Sr(1)-O(1) bond length is 2.68 Å. The Sr(1)-O(3) bond length is 2.54 Å. Both Sr(1)-O(2) bond lengths are 2.58 Å. Both Sr(1)-O(4) bond lengths are 2.60 Å. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one H(2), one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms. The Sr(2)-H(2) bond length is 2.56 Å. The Sr(2)-O(2) bond length is 2.64 Å. The Sr(2)-O(4) bond length is 2.50 Å. Both Sr(2)-O(1) bond lengths are 2.59 Å. Both Sr(2)-O(3) bond lengths are 2.58 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one Sr(1) and one O(1) atom. The H(1)-O(1) bond length is 0.98 Å. In the second H site, H(2) is bonded in a single-bond geometry to one Sr(2) and one O(2) atom. The H(2)-O(2) bond length is 0.98 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(3) atom. The H(3)-O(3) bond length is 0.98 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(4) atom. The H(4)-O(4) bond length is 0.98 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Sr(1), two equivalent Sr(2), and one H(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one Sr(2), two equivalent Sr(1), and one H(2) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Sr(1), two equivalent Sr(2), and one H(3) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one Sr(2), two equivalent Sr(1), and one H(4) atom.