title: Bis(ammonium) fluorophosphate at room temperature.
abstract: The title room-temperature phase of (NH(4))(2)(PO(3)F) is orthorhombic (Pna2(1)) and is related to the beta-K(2)SO(4) structure family. The title structure consists of ammonium cations, NH(4)(+), and fluorophosphate anions, (PO(3)F)(2-). These ions are connected by N-H.O hydrogen bonds. Two-centre N-H.F hydrogen bonds are not present in the structure. Phase transitions were detected at 251+/-2 and 274+/-2 K during cooling and heating, respectively.
authors: Institute of Physics, Czech Academy of Sciences, Na Slovance 2, 182 21 Praha 8, Czech Republic.
authors: Radmila
authors: R
authors: Krupková
authors: Jan
authors: J
authors: Fábry
authors: Ivana
authors: I
authors: Císarová
authors: Premysl
authors: P
authors: Vanek