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Influence of Molecular and Lattice Vibrations on the Stability of Layered Crystal Structure of Guanidinium Nitrate
Author(s) -
Szafrański M.
Publication year - 1997
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(199706)201:2<343::aid-pssb343>3.0.co;2-2
Subject(s) - crystal structure , chemistry , raman spectroscopy , inelastic neutron scattering , hydrogen bond , proton , crystallography , infrared spectroscopy , molecular vibration , neutron diffraction , nitrate , ion , neutron scattering , neutron , molecule , optics , physics , organic chemistry , quantum mechanics
The dynamics of guanidinium nitrate studied by inelastic neutron scattering, infrared and Raman spectroscopy is reported. The experimental frequencies were assigned to the fundamental modes of nitrate and guanidinium ions on the basis of qualitative considerations. The assignment of the out‐of‐plane bending mode γ(N–H–O) of the hydrogen bond is proposed. The neutron experiment shows that skeletal deformation modes of guanidinium cations are coupled with large amplitude proton motions. The role of these modes in the stability of the guanidinium nitrate crystal structure and the transition mechanism is discussed.