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Rationalizing th structures of Zintl and polar intermetallic phases
Graduate Theses and Dissertations
  • Fei Wang, Iowa State University
Degree Type
Dissertation
Date of Award
2011
Degree Name
Doctor of Philosophy
Department
Chemistry
First Advisor
Gordon J. Miller
Subject Categories
Abstract

Zintl and polar intermetallic phases are compounds intermediate among classical metals, ionic crystals, and covalent crystals and they exhibit metallicity, ionicity, and covalency simultaneously. It is challenging to rationalize the structures of these phases because we cannot simplistically apply the rules that are applicable to metallic, ionic, or covalent solids.

This dissertation includes our synergic works between experiments and quantum mechanical calculations in rationalizing the structures of Zintl and polar intermetallic phases. By studying alkali metal trielides and alkali metal gold bismuthides, we investigated the competition among metallicity, ionicity, and covalency and its structural effects, through which we made several supplements to the Zintl-Klemm formalism and deepened our understanding of the structures of Zintl and polar intermetallic phases.

We also studied the EuAgxAl11-x systems, addressed the "coloring problem", which occurs frequently in Zintl and polar intermetallic phases, and rationalized the competition between the BaCd11- and the BaHg11-type structures.

Some preliminary works were also done with the Gd5Tt4 systems to rationalize their structural variations.

Copyright Owner
Fei Wang
Language
en
Date Available
2012-04-30
File Format
application/pdf
File Size
148 pages
Citation Information
Fei Wang. "Rationalizing th structures of Zintl and polar intermetallic phases" (2011)
Available at: http://works.bepress.com/fei_wang/2/