title: Na(6)(H(2)O)(20)(V(10)O(28)) x 4H(2)O, a novel polyvanadate(V) with a three-dimensional framework.
abstract: The novel title polyvanadate(V), poly[[octa-mu-aqua-dodecaaqua-mu(4)-octacosaoxidodecavanadato-hexasodium] tetrahydrate], [Na(6)(H(2)O)(20)(V(10)O(28)).4H(2)O](n), contains [V(10)O(28)](6-) anions which lie about inversion centres and have approximate 2/m symmetry and which are linked to [Na(3)(H(2)O)(10)](3+) cations through two terminal and two mu(2)-bridging O atoms. The structure contains three inequivalent Na(+) cations, two of which form [Na(2)(H(2)O)(8)](n) chains, which are linked via NaO(6) octahedra involving the third Na(+) ion, thus forming a three-dimensional framework.
authors.affiliation: Department of Chemistry and Environmental Science, Zhangzhou Normal University, Zhangzhou, Fujian 363000, People's Republic of China. guohongxu919@yahoo.com.cn
authors.forename: Hong-Xu
authors.initials: HX
authors.lastname: Guo
authors.forename: Zhong-Liang
authors.initials: ZL
authors.lastname: Yao
mesh_terms: D002414:Cations, Monovalent / Q000737:chemistry; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008958:Models, Molecular; D015394:Molecular Structure; D014638:Vanadates / Q000737:chemistry*; D017968:Vanadium Compounds / Q000737:chemistry*
chemical_list: D002414:Cations, Monovalent; D017968:Vanadium Compounds; C523133:poly(octa-mu-aqua-dodecaaqua-mu4-octacosaoxidodecavanadato-hexasodium); D014638:Vanadates