Sr(OH)2H2O crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(6), two equivalent O(3), and two equivalent O(5) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one H(8), one O(1), one O(2), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a linear geometry to one O(1) and one O(3) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(2) atom. In the fourth H site, H(4) is bonded in a linear geometry to one O(2) and one O(4) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(3) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(5) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one O(4) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one Sr(2) and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Sr(1), one Sr(2), one H(1), and one H(2) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Sr(1), one Sr(2), one H(3), and one H(4) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to two equivalent Sr(1), one H(2), and one H(5) atom. In the fourth O site, O(4) is bonded in a distorted water-like geometry to two equivalent Sr(2), one H(4), and one H(7) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to two equivalent Sr(1), two equivalent Sr(2), and one H(6) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one Sr(1), two equivalent Sr(2), and one H(8) atom.
Sr(OH)2H2O crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(6), two equivalent O(3), and two equivalent O(5) atoms. The Sr(1)-O(1) bond length is 2.75 Å. The Sr(1)-O(2) bond length is 2.55 Å. The Sr(1)-O(6) bond length is 2.66 Å. There is one shorter (2.56 Å) and one longer (2.63 Å) Sr(1)-O(3) bond length. There is one shorter (2.60 Å) and one longer (2.75 Å) Sr(1)-O(5) bond length. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one H(8), one O(1), one O(2), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. The Sr(2)-H(8) bond length is 2.64 Å. The Sr(2)-O(1) bond length is 2.70 Å. The Sr(2)-O(2) bond length is 2.56 Å. There is one shorter (2.62 Å) and one longer (3.11 Å) Sr(2)-O(4) bond length. There is one shorter (2.66 Å) and one longer (2.77 Å) Sr(2)-O(5) bond length. There is one shorter (2.54 Å) and one longer (2.89 Å) Sr(2)-O(6) bond length. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one O(1) atom. The H(1)-O(1) bond length is 1.02 Å. In the second H site, H(2) is bonded in a linear geometry to one O(1) and one O(3) atom. The H(2)-O(1) bond length is 1.04 Å. The H(2)-O(3) bond length is 1.52 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(2) atom. The H(3)-O(2) bond length is 0.98 Å. In the fourth H site, H(4) is bonded in a linear geometry to one O(2) and one O(4) atom. The H(4)-O(2) bond length is 1.47 Å. The H(4)-O(4) bond length is 1.06 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(3) atom. The H(5)-O(3) bond length is 0.98 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(5) atom. The H(6)-O(5) bond length is 0.98 Å. In the seventh H site, H(7) is bonded in a single-bond geometry to one O(4) atom. The H(7)-O(4) bond length is 1.00 Å. In the eighth H site, H(8) is bonded in a single-bond geometry to one Sr(2) and one O(6) atom. The H(8)-O(6) bond length is 0.98 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Sr(1), one Sr(2), one H(1), and one H(2) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Sr(1), one Sr(2), one H(3), and one H(4) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to two equivalent Sr(1), one H(2), and one H(5) atom. In the fourth O site, O(4) is bonded in a distorted water-like geometry to two equivalent Sr(2), one H(4), and one H(7) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to two equivalent Sr(1), two equivalent Sr(2), and one H(6) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one Sr(1), two equivalent Sr(2), and one H(8) atom.