Please use this identifier to cite or link to this item:
http://hdl.handle.net/11375/12129
Title: | Polytypism and the Vibrational Properties of PbI₂ |
Authors: | Sears, Maxwell William |
Advisor: | Morrison, J. A. |
Department: | Physics |
Keywords: | Physics;Physics |
Publication Date: | May-1978 |
Abstract: | <p>The vibrational properties of polytypes of PbI₂ crystals have been studied experimentally by means of the techniques of Raman spectroscopy, X-ray diffraction and low temperature calorimetry. The crystals were prepared by three different methods: gel growth, thermal annealing and growth from the melt.</p> <p>The Raman spectra are used to determine features of the phonon dispersion curves, in the crystallographic c-direction, that are common to all of the polytypes. The results are correlated with existing information obtained from measurements of Brillouin spectra and inelastic scattering of neutrons.</p> <p>Both the heat capacity and the thermal conductivity were determined from the calorimetric measurements in the region 0.5</p> <p>All of the results are analysed within the framework of a 6-parameter force constant model. Bounds are placed on the magnitudes of anharmonic and 2-dimensional contributions to the vibrational properties.</p> |
URI: | http://hdl.handle.net/11375/12129 |
Identifier: | opendissertations/704 1895 1073987 |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Size | Format | |
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fulltext.pdf | 3.56 MB | Adobe PDF | View/Open |
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