Experimental electron density reconstruction and analysis of titanium diboride and binary vanadium borides
Intermetallic borides are characterized by a great variety of crystal structures and bonding interactions, however, a comprehensive rationalisation of the electronic structure is missing. A more general interpretation will be targeted towards comparing several boride phases of one particular transit...
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2013
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Online Access: | http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-119046 http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-119046 http://www.qucosa.de/fileadmin/data/qucosa/documents/11904/B%C3%BCrgehan_Terlan.pdf |
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ndltd-DRESDEN-oai-qucosa.de-bsz-14-qucosa-1190462013-08-09T15:10:29Z Experimental electron density reconstruction and analysis of titanium diboride and binary vanadium borides Terlan, Bürgehan Intermetallische Boride Elektronendichte Topologie intermetallic borides electron density topology ddc:546.67 rvk:VH 7907 Intermetallic borides are characterized by a great variety of crystal structures and bonding interactions, however, a comprehensive rationalisation of the electronic structure is missing. A more general interpretation will be targeted towards comparing several boride phases of one particular transition metal on one hand side, but also isostructural borides of various metals at the other side. Finally, a concise model should result from a detailed analysis of excellent data both from experimental charge density analysis and quantum chemical methods. Ultimate target is a transferability model based on typical building blocks. Experimental investigations of the electron density derived from diffraction data are very rare for intermetallic compounds. One of the main reasons is that the suitability of such compounds for charge density analysis is estimated to be relatively low as compared to organic compounds. In the present work, X-ray single crystal diffraction measurements up to high resolution were carried out for TiB2, VB2, V3B4, and VB crystals. The respective experimental electron densities were reconstructed using the multipole model introduced by Hansen and Coppens [1]. The topological aspects of the experimental electron density were analysed on the basis of the multipole parameters using Bader’s Quantum Theory, Atoms in Molecules [2] and compared with theoretical calculations. References [1] Hansen, N.K.; Coppens, P. Acta Crystallogr. 1978, A34, 909 [2] Bader, R.F.W. Atoms in Molecules─A Quantum Theory; Oxford University Press: Oxford, 1990 Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden Technische Universität Dresden, Fakultät Mathematik und Naturwissenschaften Prof. Juri Grin Prof. Dr. Michael Ruck 2013-08-01 doc-type:doctoralThesis application/pdf http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-119046 urn:nbn:de:bsz:14-qucosa-119046 PPN392084201 http://www.qucosa.de/fileadmin/data/qucosa/documents/11904/B%C3%BCrgehan_Terlan.pdf eng |
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language |
English |
format |
Doctoral Thesis |
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Intermetallische Boride Elektronendichte Topologie intermetallic borides electron density topology ddc:546.67 rvk:VH 7907 |
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Intermetallische Boride Elektronendichte Topologie intermetallic borides electron density topology ddc:546.67 rvk:VH 7907 Terlan, Bürgehan Experimental electron density reconstruction and analysis of titanium diboride and binary vanadium borides |
description |
Intermetallic borides are characterized by a great variety of crystal structures and bonding interactions, however, a comprehensive rationalisation of the electronic structure is missing. A more general interpretation will be targeted towards comparing several boride phases of one particular transition metal on one hand side, but also isostructural borides of various metals at the other side. Finally, a concise model should result from a detailed analysis of excellent data both from experimental charge density analysis and quantum chemical methods. Ultimate target is a transferability model based on typical building blocks.
Experimental investigations of the electron density derived from diffraction data are very rare for intermetallic compounds. One of the main reasons is that the suitability of such compounds for charge density analysis is estimated to be relatively low as compared to organic compounds. In the present work, X-ray single crystal diffraction measurements up to high resolution were carried out for TiB2, VB2, V3B4, and VB crystals. The respective experimental electron densities were reconstructed using the multipole model introduced by Hansen and Coppens [1]. The topological aspects of the experimental electron density were analysed on the basis of the multipole parameters using Bader’s Quantum Theory, Atoms in Molecules [2] and compared with theoretical calculations.
References
[1] Hansen, N.K.; Coppens, P. Acta Crystallogr. 1978, A34, 909
[2] Bader, R.F.W. Atoms in Molecules─A Quantum Theory; Oxford University Press: Oxford, 1990 |
author2 |
Technische Universität Dresden, Fakultät Mathematik und Naturwissenschaften |
author_facet |
Technische Universität Dresden, Fakultät Mathematik und Naturwissenschaften Terlan, Bürgehan |
author |
Terlan, Bürgehan |
author_sort |
Terlan, Bürgehan |
title |
Experimental electron density reconstruction and analysis of titanium diboride and binary vanadium borides |
title_short |
Experimental electron density reconstruction and analysis of titanium diboride and binary vanadium borides |
title_full |
Experimental electron density reconstruction and analysis of titanium diboride and binary vanadium borides |
title_fullStr |
Experimental electron density reconstruction and analysis of titanium diboride and binary vanadium borides |
title_full_unstemmed |
Experimental electron density reconstruction and analysis of titanium diboride and binary vanadium borides |
title_sort |
experimental electron density reconstruction and analysis of titanium diboride and binary vanadium borides |
publisher |
Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden |
publishDate |
2013 |
url |
http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-119046 http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-119046 http://www.qucosa.de/fileadmin/data/qucosa/documents/11904/B%C3%BCrgehan_Terlan.pdf |
work_keys_str_mv |
AT terlanburgehan experimentalelectrondensityreconstructionandanalysisoftitaniumdiborideandbinaryvanadiumborides |
_version_ |
1716595460846649344 |