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Orientational disorder in ammonium chloride: elastic diffuse neutron scattering with a new technique
Author(s) -
Born R.,
Hohlwein D.,
Eckold G.
Publication year - 1989
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s002188988900631x
Subject(s) - reciprocal lattice , intensity (physics) , neutron , neutron scattering , range (aeronautics) , chemistry , scattering , ammonium chloride , space (punctuation) , molecular physics , condensed matter physics , materials science , optics , physics , nuclear physics , diffraction , linguistics , philosophy , composite material
Elastic diffuse neutron scattering intensity due to orientational disorder in ND 4 Cl at room temperature, space group Pm 3 m , is studied with a single crystal. By a novel `vertical' energy analysis on the one hand and the `flat‐cone' technique on the other, the intensity is obtained in a large three‐dimensional region of reciprocal space in a reasonable time. The data are analysed with short‐range‐order and interaction‐potential parameters. The two parameter sets are consistent. Local chlorine displacements of 0.16 Å, along 〈111〉 directions are determined.