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The incommensurately modulated structure of Ho13Zn58: a little order goes a long way
Stockholm University, Faculty of Science, Department of Physical, Inorganic and Structural Chemistry.
In: Solid State Sci.Article in journal (Refereed) Submitted
Identifiers
URN: urn:nbn:se:su:diva-24592OAI: oai:DiVA.org:su-24592DiVA: diva2:197849
Note
Part of urn:nbn:se:su:diva-7203Available from: 2007-11-28 Created: 2007-11-21Bibliographically approved
In thesis
1. Complexity of quasicrystal approximants —The RECd6 and RE13(Zn/Cd)~58 systems
Open this publication in new window or tab >>Complexity of quasicrystal approximants —The RECd6 and RE13(Zn/Cd)~58 systems
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis is focused on the synthesis and structural determination of a series of quasicrystal approximants in the RE13Zn~58 (RE = Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu), Ce13Cd~58 and RECd6 (RE = Tb, Ho, Er, Tm and Lu) systems. Structural studies were performed by single crystal X-ray diffraction methods.

The RECd6 phases are 1/1 cubic approximants to the stable icosahedral quasicrystals. The structure of quasicrystals cannot be solved by conventional crystallography due to the lack of periodicity in three-dimensional space. On the other hand, quasicrystal approximants exhibit long-range order, which makes their structural determination possible by standard methods. Since they are believed to display the same local arrangement as the quasicrystals, the structures of the quasicrystal approximants play a key role in understanding quasicrystals.

The RE13Zn~58 and Ce13Cd~58 quasicrystal approximants show measurable compositional variations coupled to subtle structural differences. The crystal structures are generally rather more complex than previously reported, and exhibit a number of different ordering and disordering modes.

Place, publisher, year, edition, pages
Stockholm: Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi, 2007. 82 p.
Keyword
Rare-earth, Quasicrystal approximant, order and disorder
National Category
Chemical Sciences
Research subject
Inorganic Chemistry
Identifiers
urn:nbn:se:su:diva-7203 (URN)978-91-7155-515-1 (ISBN)
Public defence
2007-12-19, Magnélisalen, Kemiska övningslaboratoriet, Svante Arrhenius väg 12 A, Stockholm, 10:00
Opponent
Supervisors
Available from: 2007-11-28 Created: 2007-11-21Bibliographically approved

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