Hydrogen Density Distribution in Paraelectric Potassium Dihydrogen Phosphate

Abstract

The hydrogen density distribution in potassium dihydrogen phosphate was studied by incoherent elastic neutron scattering. The motions across the hydrogen bond were found to be harmonic in character. The motion along the bond is characterized by a broad density distribution near room temperature. This motion is shown to be strongly anharmonic by comparing the incoherent measurements with the coherent neutron scattering results of Bacon and Pease, and as a consequence of spectroscopic data.