Please use this identifier to cite or link to this item:
http://hdl.handle.net/11375/17865
Title: | A Study of the Quadrupolar Interaction in Vanadium-Oxygen Compounds |
Authors: | Gornostansky, Shaul David |
Advisor: | Stager, C. V. |
Department: | Physics |
Keywords: | vanadium;vanadium pentoxide;charge distribution;nuclear magnetic resonance;point multipole model;covalent model |
Publication Date: | May-1968 |
Abstract: | The quadrupolar interaction in sodium orthovanadate dodecahydrate, calcium orthovanadate, vanadinite, descloizite, zirconium divanadate, cadmium divanadate, potassium metavanadate and vanadium pentoxide, was studied by nuclear magnetic resonance. The v51 quadrupole coupling constants in these compounds show a strong correlation with the distortion of the tetrahedral symmetry around the vanadium ion. Vanadium pentoxide is an exception and shows a surprisingly small coupling constant. The point multipole model was found to be inadequate for the calculations of the electric field gradients in these compounds. A covalent model provides an explanation of the small magnitude of the coupling constant of vanadium pentoxide. However, because of the numbers of approximations in this model, only a qualitative correlation with the experimental results was achieved. In addition, the chemical shift tensor of the v51 resonance line in a single crystal of vanadium pentoxide was measured to be very large. This result was correlated with a large Van Vleck term in the magnetic susceptibility of vanadium pentoxide. |
URI: | http://hdl.handle.net/11375/17865 |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Description | Size | Format | |
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Gornostansky_Shaul_David_1968May_PhD.pdf | Thesis | 39.27 MB | Adobe PDF | View/Open |
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