Crystal structure of Zn(2)(HTeO(3))(AsO(4))

Single crystals of Zn(2)(HTeO(3))(AsO(4)), dizinc(II) hydroxidodioxidotellurate(IV) oxidoarsenate(V), were obtained as one of the by-products in a hydro­thermal reaction between Zn(NO(3))(2)·6H(2)O, TeO(2), H(3)AsO(4) and NH(3) in molar ratios of 2:1:2:10 at 483 K for seven days. The asymmetric unit of Zn(2)(HTeO(3))(AsO(4)) contains one Te (site symmetry m), one As (m), one Zn (1), five O (three m, two 1) and one H (m) site. The Zn(II) atom exhibits a coordination number of 5 and is coordinated by four oxygen atoms and a hydroxide group, forming a distorted trigonal bipyramid. The hydroxide ion is positioned at a significantly larger distance on one of the axial positions of the bipyramid. The [ZnO(4)OH] polyhedra are connected to each other by corner-sharing to form (∞) (2)[ZnO(3/2)(OH)(1/2)O(1/1)] layers extending parallel to (001). The Te(IV) atom is coordinated by three oxygen atoms and a hydroxide group in a one-sided manner in the shape of a bis­phenoid, revealing stereochemical activity of its 5s (2) electron lone pair. The As(V) atom is coordinated by four oxygen atoms to form the tetra­hedral oxidoarsenate(V) anion. By corner-sharing, [TeO(3)OH] and [AsO(4)] groups link adjacent (∞) (2)[ZnO(3/2)(OH)(1/2)O(1/1)] layers along [001] into a three-dimensional framework structure.