Ca(OH)2 crystallizes in the monoclinic P2_1/c space group. Ca(1) is bonded in a 7-coordinate geometry to one H(2), three equivalent O(1), and three equivalent O(2) atoms. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one Ca(1) and one O(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to three equivalent Ca(1) and one H(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to three equivalent Ca(1) and one H(2) atom.
Ca(OH)2 crystallizes in the monoclinic P2_1/c space group. Ca(1) is bonded in a 7-coordinate geometry to one H(2), three equivalent O(1), and three equivalent O(2) atoms. The Ca(1)-H(2) bond length is 2.37 Å. There are a spread of Ca(1)-O(1) bond distances ranging from 2.40-2.48 Å. There are a spread of Ca(1)-O(2) bond distances ranging from 2.34-2.42 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. The H(1)-O(1) bond length is 0.97 Å. In the second H site, H(2) is bonded in a single-bond geometry to one Ca(1) and one O(2) atom. The H(2)-O(2) bond length is 0.98 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to three equivalent Ca(1) and one H(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to three equivalent Ca(1) and one H(2) atom.