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Title: Infrared study of phases III, IV and V of NH4NO3
Authors: Shen, Z.X. 
Kuok, M.H. 
Tang, S.H. 
Sherman, W.F.
Issue Date: Jan-1993
Source: Shen, Z.X.,Kuok, M.H.,Tang, S.H.,Sherman, W.F. (1993-01). Infrared study of phases III, IV and V of NH4NO3. Spectrochimica Acta Part A: Molecular Spectroscopy 49 (1) : 21-29. ScholarBank@NUS Repository.
Abstract: Polarized transmission and reflection IR spectra of single crystal samples were recorded. Thin films of NH4NO3 on BaF2 substrate were used to study the symmetric stretch and asymmetric stretch region of the NH+ 4 ion, as well as the NH+ 4 deformation and NO- 3 asymmetric region. Assignments based on factor group analysis are given. Possible coupling between NH+ 4 and N- 3 ions is discussed and the degrees of motion of the two different ion groups are shown to be related to the stabilities of the crystal structures. Our results support the suggestion that a phase VII exists at low temperature. © 1992.
Source Title: Spectrochimica Acta Part A: Molecular Spectroscopy
ISSN: 05848539
Appears in Collections:Staff Publications

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