title: Crystal structure of CdSO4(H2O): a redetermination.
abstract: The crystal structure of the title compound, cadmium sulfate monohydrate or poly[(μ2-aqua)(μ4-sulfato)-cadmium], was redetermined based on modern CMOS (complementary metal oxide silicon) data. In comparison with the previous study [Bregeault & Herpin (1970 ▸). Bull. Soc. Fr. Mineral. Cristallogr. 93, 37-42], all non-H atoms were refined with anisotropic displacement parameters and the hydrogen-bonding pattern unambiguously established due to location of the hydrogen atoms. In addition, a significant improvement in terms of precision and accuracy was achieved. In the crystal, the Cd(2+) cation is coordinated by four O atoms of four sulfate anions and two O atoms of water mol-ecules, forming a distorted octa-hedral trans-[CdO6] polyhedron. Each sulfate anion bridges four Cd(2+) cations and each water mol-ecule bridges two Cd(2+) cations, leading to the formation of a three-dimensional framework, with Cd⋯Cd separations in the range 4.0757 (2)-6.4462 (3) Å. O-H⋯O hydrogen-bonding inter-actions of medium strength between the coordinating water mol-ecules and sulfate anions consolidate the crystal packing.
authors.affiliation: Department of Chemistry, Faculty of Science, Naresuan University, Muang, Phitsanulok, 65000, Thailand.
authors.forename: Chatphorn
authors.initials: C
authors.lastname: Theppitak
authors.affiliation: Department of Physics, Faculty of Science and Technology, Thammasat University, Khlong Luang, Pathum Thani, 12120, Thailand.
authors.forename: Kittipong
authors.initials: K
authors.lastname: Chainok
keywords: cadmium sulfate monohydrate; crystal structure; hydrogen bonding; hydro­thermal synthesis; redetermination