uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Structures of Icosahedral Quasicrystals and Approximants
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.
2012 (English)Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

Structure determination of quasicrystals (QCs) has been one of the most challenging tasks since their discovery by Shechtman et al.[1] In this work we will assess the present state of the art concerning structure determination of icosahedral quasicrystals and approximants. In particular we will discuss the structure of the binary stable i-YbCd5.7 quasicrystal,[2] and how our knowledge of this phase has affected our overall understanding of icosahedral quasicrystals.[3] The binary i-YbCd5.7 phase could be characterized due to a fortuitous combination of circumstances: the quasicrystal is stable and high quality singlecrystals can be grown in equilibrium with a melt of the same composition. It is binary and chemically well-ordered, and furthermore two closely related approximant phases are known in close compositional vicinity to the quasicrystal. By carefully studying the structures of these related approximants and collecting singlecrystal data on the quasicrystal the structure of the i-YbCd5.7 phase could be characterized. However, far from all quasicrystals benefit from stability, chemical order and the availability of closely related approximants, in fact the i-YbCd5.7 QC is a rare exception.Fortunately,muchofwhatwehavelearntfromthis phasecanbeappliedalsotootherquasicrystals.Primarilythis applies to the related phases of the same family, since the i-YbCd5.7phaseistheparentstructureforthelargestfamilyof icosahedral quasicrystals and approximants. Most of these phases however, are ternary and suffer from chemical disorder which is yet to be well understood.[1] Shechtman et al., Phys. Rev. Lett. 53, 1951 (1984). [2] Tsai et al., Nature 408, 537 (2000).[3] Takakura et al., Nature Materials. 6, 58 (2007).

Place, publisher, year, edition, pages
Bergen, 2012.
Keywords [en]
quasicrystal; approximant; disorder
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-338115OAI: oai:DiVA.org:uu-338115DiVA, id: diva2:1171434
Conference
ECM 27, The 27:th European Crystallographic Meeting, August 6-11, 2012, Bergen, Norge
Available from: 2018-01-07 Created: 2018-01-07 Last updated: 2018-03-02Bibliographically approved

Open Access in DiVA

No full text in DiVA

Authority records BETA

Pay Gómez, Cesar

Search in DiVA

By author/editor
Pay Gómez, Cesar
By organisation
Structural Chemistry
Inorganic Chemistry

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 3 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf