You are here

FAU Collections » FAU Research Repository » FAU Theses and Dissertations

RAMAN SPECTRUM STUDY OF PHASE I AND II OF SOLID AMMONIA (GRANEISEN PARAMETERS)

Download pdf | Full Screen View

Date Issued:
1986
Summary:
The Raman spectra of ammonia solid I and II were studied in the lattice and intramolecular region. The study of the internal modes of phase I suggests the presence of disorder in the ordered phase. The lattice modes of phase II are, for the first time, carefully reported as two very broad lines superimposed on an overdamped feature. The results confirm the structure previously determined by neutron scattering and NMR that phase II is a typical disordered phase with space group P6,3/mmc. A mode assignment was tentatively made and Gruneisen parameters of the two assumed translational modes calculated. In terms of the Michel-Naudts theory of rotational-translational interactions, phase II is in the slow relaxation regime. A four-band model was used for the intramolecular stretching region.
Title: RAMAN SPECTRUM STUDY OF PHASE I AND II OF SOLID AMMONIA (GRANEISEN PARAMETERS).
89 views
18 downloads
Name(s): LUO, RENKANG
Florida Atlantic University, Degree Grantor
Type of Resource: text
Genre: Electronic Thesis Or Dissertation
Issuance: monographic
Date Issued: 1986
Publisher: Florida Atlantic University
Place of Publication: Boca Raton, Fla.
Physical Form: application/pdf
Extent: 134 p.
Language(s): English
Summary: The Raman spectra of ammonia solid I and II were studied in the lattice and intramolecular region. The study of the internal modes of phase I suggests the presence of disorder in the ordered phase. The lattice modes of phase II are, for the first time, carefully reported as two very broad lines superimposed on an overdamped feature. The results confirm the structure previously determined by neutron scattering and NMR that phase II is a typical disordered phase with space group P6,3/mmc. A mode assignment was tentatively made and Gruneisen parameters of the two assumed translational modes calculated. In terms of the Michel-Naudts theory of rotational-translational interactions, phase II is in the slow relaxation regime. A four-band model was used for the intramolecular stretching region.
Identifier: 14346 (digitool), FADT14346 (IID), fau:11153 (fedora)
Note(s): Thesis (M.S.)--Florida Atlantic University, 1986.
Subject(s): Ammonia--Spectra
Raman spectroscopy
Held by: Florida Atlantic University Libraries
Persistent Link to This Record: http://purl.flvc.org/fcla/dt/14346
Sublocation: Digital Library
Use and Reproduction: Copyright © is held by the author with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder.
Use and Reproduction: http://rightsstatements.org/vocab/InC/1.0/
Host Institution: FAU
Is Part of Series: Florida Atlantic University Digital Library Collections.