Acta Cryst. (2002). E58, i34-i36  [ doi:10.1107/S1600536802005421 ]

Tetradecaaquatetrasodium hexaaquanickel(II) decavanadate(V) trihydrate

Z.-G. Sun, L.-S. Long, Y.-P. Ren, R.-B. Huang, L.-S. Zheng and S. W. Ng

Abstract: Three crystallographically independent Na atoms and four pairs of water molecules occupying general positions form the link between the other two independent Na atoms occupying special positions on the inversion centres in the crystal of tetradecaaquatetrasodium hexaaquanickel(II) decavanadate(V) trihydrate, Na₄Ni(V₁₀O₂₈)·23H₂O. In this way, the infinite chains made up of the Na atoms and water molecules, and stretching along the (01) direction, are formed. Each of the two independent Na atoms, which occupy centrosymmetric sites, are coordinated by one of the vanadyl atoms of one of the two independent centrosymmetric [V₁₀O₂₈]^6- hexaanions, thus effectively linking the chains into infinite layered structure. The layers are further integrated into a three-dimensional network through numerous hydrogen bonds involving water molecules, including those which are part of the sodium chains, as well as those which belong to [Ni(H₂O)₆]²⁺ coordination octahedra and those which are not coordinated by any metal (lattice hydrate molecules).

Online 5 April 2002

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