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F. Eder, M. Weil:
"Crystal structure of Zn2(HTeO3)(AsO4)";
Acta Crystallographica Section E: Crystallographic Communications, 77 (2021), 77; 555 S.

Single crystals of Zn2(HTeO3)(AsO4), dizinc(II) hydroxidodioxidotellurate(IV) oxidoarsenate(V), were obtained as one of the by-products in a hydro­thermal reaction between Zn(NO3)2·6H2O, TeO2, H3AsO4 and NH3 in molar ratios of 2:1:2:10 at 483 K for seven days. The asymmetric unit of Zn2(HTeO3)(AsO4) contains one Te (site symmetry m), one As (m), one Zn (1), five O (three m, two 1) and one H (m) site. The ZnII 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 [ZnO4OH] polyhedra are connected to each other by corner-sharing to form ∞2[ZnO3/2(OH)1/2O1/1] layers extending parallel to (001). The TeIV 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 5s2 electron lone pair. The AsV atom is coordinated by four oxygen atoms to form the tetra­hedral oxidoarsenate(V) anion. By corner-sharing, [TeO3OH] and [AsO4] groups link adjacent ∞2[ZnO3/2(OH)1/2O1/1] layers along [001] into a three-dimensional framework structure.

http://dx.doi.org/10.1107/S2056989021004333