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High‐pressure Raman study of ammonium halides
Author(s) -
Jeon SeungJoon,
Porter Richard F.,
Ruoff Arthur L.
Publication year - 1988
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250190307
Subject(s) - raman spectroscopy , halide , chemistry , ammonium , analytical chemistry (journal) , hydrogen bond , spectral line , inorganic chemistry , molecule , organic chemistry , optics , physics , astronomy
Raman spectra of NH 4 X (X = Cl, Br, I) in the range 2800–3200 cm −1 have been obtained at pressures up to 40 GPa at room temperature. The pressure dependences of the n̈ 1 and n̈ 3 modes are discussed in relation to hydrogen bonding effects in the crystals. The Raman spectra of ammonium halides show that the n̈ 3 mode merges to the v 1 mode at pressures above 22.5 GPa in NH 4 Cl, 33.5 GPa in NH 4 Br and 35 GPa in NH 4 I.