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Superstructure of Eu4Cd25 : A quasicrystal approximant

Pay Gómez, Cesar and Lidin, Sven LU (2004) In Chemistry - A European Journal 10(13). p.3279-3285
Abstract

The quasicrystal approximant Eu4Cd25, formerly designated EuCd6, was synthesized and characterized by means of single-crystal X-ray diffraction. Superstructure reflections corresponding to an F-centered cubic unit cell with a doubled cell-parameter relative to the I-centered cubic sub-cell could be observed in the diffraction data. This gives the largest cubic unit cell reported to date among binary alloys. The superstructure exhibits structural features that are found in all the RE-Cd 6 approximants as well as a further ordering between vacant/occupied Cd8 cubes and oriented Cd4 tetrahedra, which causes the superstructure. A reversible high-temperature phase-transition... (More)

The quasicrystal approximant Eu4Cd25, formerly designated EuCd6, was synthesized and characterized by means of single-crystal X-ray diffraction. Superstructure reflections corresponding to an F-centered cubic unit cell with a doubled cell-parameter relative to the I-centered cubic sub-cell could be observed in the diffraction data. This gives the largest cubic unit cell reported to date among binary alloys. The superstructure exhibits structural features that are found in all the RE-Cd 6 approximants as well as a further ordering between vacant/occupied Cd8 cubes and oriented Cd4 tetrahedra, which causes the superstructure. A reversible high-temperature phase-transition was observed at 782 K by means of DSC.

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author
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publishing date
type
Contribution to journal
publication status
published
keywords
Approximants, Intermetallic phases, Quasicrystals, Rare earths, X-ray diffraction
in
Chemistry - A European Journal
volume
10
issue
13
pages
7 pages
publisher
Wiley-Blackwell
external identifiers
  • scopus:3142715349
ISSN
0947-6539
DOI
10.1002/chem.200305463
language
English
LU publication?
no
id
d3fcac67-d2cb-49bc-8c87-617fdba9e6ae
date added to LUP
2019-04-08 15:25:10
date last changed
2022-04-02 07:51:32
@article{d3fcac67-d2cb-49bc-8c87-617fdba9e6ae,
  abstract     = {{<p>The quasicrystal approximant Eu<sub>4</sub>Cd<sub>25</sub>, formerly designated EuCd<sub>6</sub>, was synthesized and characterized by means of single-crystal X-ray diffraction. Superstructure reflections corresponding to an F-centered cubic unit cell with a doubled cell-parameter relative to the I-centered cubic sub-cell could be observed in the diffraction data. This gives the largest cubic unit cell reported to date among binary alloys. The superstructure exhibits structural features that are found in all the RE-Cd <sub>6</sub> approximants as well as a further ordering between vacant/occupied Cd<sub>8</sub> cubes and oriented Cd<sub>4</sub> tetrahedra, which causes the superstructure. A reversible high-temperature phase-transition was observed at 782 K by means of DSC.</p>}},
  author       = {{Pay Gómez, Cesar and Lidin, Sven}},
  issn         = {{0947-6539}},
  keywords     = {{Approximants; Intermetallic phases; Quasicrystals; Rare earths; X-ray diffraction}},
  language     = {{eng}},
  month        = {{07}},
  number       = {{13}},
  pages        = {{3279--3285}},
  publisher    = {{Wiley-Blackwell}},
  series       = {{Chemistry - A European Journal}},
  title        = {{Superstructure of Eu<sub>4</sub>Cd<sub>25</sub> : A quasicrystal approximant}},
  url          = {{http://dx.doi.org/10.1002/chem.200305463}},
  doi          = {{10.1002/chem.200305463}},
  volume       = {{10}},
  year         = {{2004}},
}