title: Powder neutron diffraction of SrNbO2N at room temperature and 1.5 K.
abstract: The structure of strontium niobium dioxygen nitride, SrNbO2N, has been solved by powder neutron diffraction at room temperature and 1.5 K. SrNbO2N crystallizes in the tetragonal space group I4/mcm, with a = 5.7056 (4) and c = 8.1002 (9) A at room temperature, and a = 5.6938 (4) and c = 8.0974 (8) A at 1.5 K. The crystal structure is derived from the cubic perovskite archetype by a slight rotation of the Nb(O,N)6 octahedra with respect to the tetragonal axis. A partially ordered distribution of oxygen and nitrogen on the anionic sites was found.
authors.affiliation: Lehrstuhl für Festkörperchemie, Institut für Physik, Universität Augsburg, Universitätsstrasse 1, D-86159 Augsburg, Germany. stefan.ebbinghaus@physik.uni-augsburg.de
authors.forename: Stefan G
authors.initials: SG
authors.lastname: Ebbinghaus
authors.forename: Anke
authors.initials: A
authors.lastname: Weidenkaff
authors.forename: Anita
authors.initials: A
authors.lastname: Rachel
authors.forename: Armin
authors.initials: A
authors.lastname: Reller