title: Ammonium scandium tetrafluoride.
abstract: The title compound, NH4ScF4, is an addition to the AMF4 family of layered perovskite-like structures. The structure consists of a two-dimensional array of corner-sharing ScF6 octahedra, which produces anionic sheets of stoichiometry [ScF4]- stacked along the c axis. The layers are separated by charge-balancing ammonium cations, which hydrogen bond to the apical F atoms of adjacent layers. This structure may be viewed as a ;single-layer' fluoride analogue of the Dion-Jacobson family of oxides.
authors.affiliation: School of Chemistry, University of St Andrews, Fife KY16 9ST, Scotland.
authors.forename: Nicholas F
authors.initials: NF
authors.lastname: Stephens
authors.forename: Philip
authors.initials: P
authors.lastname: Lightfoot