title: Hexaaqua-magnesium(II) bis-{5-[3-(1H-tetra-zol-5-yl)phen-yl]tetra-zolide} tetra-hydrate.
abstract: The asymmetric unit of the title compound, [Mg(H(2)O)(6)](C(8)H(5)N(8))(2)·4H(2)O, contains one half of the centrosymmetric dication, one anion and two water mol-ecules. The Mg(II) ion is coordinated by six water mol-ecules in a slightly distorted octa-hedral geometry. In the anion, the two five-membered heterocycles are twisted from the central benzene ring by 4.34 (11) and 3.20 (10)°. In the crystal, O-H⋯N, O-H⋯O and N-H⋯O hydrogen bonds generate a three-dimensional network.
authors.affiliation: Department of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Comprehensive Utilization of Tailing Resources, Shangluo University, Shangluo 726000, Shaanxi,  People's Republic of China.
authors.forename: Cheng-Fang
authors.initials: CF
authors.lastname: Qiao
authors.forename: Chun-Sheng
authors.initials: CS
authors.lastname: Zhou