title: Hexagonal ammonium zinc phosphate, (NH4)ZnPO4, at 10 K.
abstract: The title compound, (NH(4))ZnPO(4)-HEX, is built up from a three-dimensional network of ZnO(4) and PO(4) tetrahedra [d(av)(Zn-O) = 1.9400 (7) A and d(av)(P-O) = 1.5396 (7) A], fused together via Zn-O-P links [straight theta(av) = 133.47 (4) degrees ]. An undisordered linear Zn-O-P bond occurs (all three atoms lie on a threefold axis). Extra-framework NH(4)(+) cations, which interact with the [ZnPO(4)](-) framework by hydrogen bonds, complete the crystal structure.
authors.affiliation: Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, Scotland. w.harrison@abdn.ac.uk
authors.forename: W T
authors.initials: WT
authors.lastname: Harrison
authors.forename: A N
authors.initials: AN
authors.lastname: Sobolev
authors.forename: M L
authors.initials: ML
authors.lastname: Phillips