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Complexity of hexagonal approximates in the RE13Zn ∼58 system (RE = Ce, Pr, Nd, Sm, Gd, Tb and Dy)

Piao, Shuying ; Gómez, Cesar Pay and Lidin, Sven LU (2006) In Zeitschrift fur Kristallographie 221(5-7). p.391-401
Abstract

For the RE13Zn58 quasicrystal approximants (RE = Ce, Pr, Nd, Sm, Gd, Tb, Dy), single crystals were prepared from the elements and their structures were refined from single-crystal X-ray diffraction data. They are derived from the Gd13Cd58 type structure and crystallize in the space group P63/mmc or its subgroups. The crystal structures of Ce and Pr compounds are identical to that of the archetype, in the Nd compound a pair exchange disorder changes the composition and for Sm a further, partially occupied interstitial position lowers the symmetry to P6 3mc. For the compounds with Gd, Tb and Dy, the occupancy may order, lowering the symmetry further. For the case of... (More)

For the RE13Zn58 quasicrystal approximants (RE = Ce, Pr, Nd, Sm, Gd, Tb, Dy), single crystals were prepared from the elements and their structures were refined from single-crystal X-ray diffraction data. They are derived from the Gd13Cd58 type structure and crystallize in the space group P63/mmc or its subgroups. The crystal structures of Ce and Pr compounds are identical to that of the archetype, in the Nd compound a pair exchange disorder changes the composition and for Sm a further, partially occupied interstitial position lowers the symmetry to P6 3mc. For the compounds with Gd, Tb and Dy, the occupancy may order, lowering the symmetry further. For the case of Tb13Zn59 high quality single crystals allowed us to refine the fully ordered orthorhombic super structure.

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author
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publishing date
type
Contribution to journal
publication status
published
keywords
Approximant, Order-disorder, Single crystal structure analysis, Superstructure, X-ray diffraction
in
Zeitschrift fur Kristallographie
volume
221
issue
5-7
pages
11 pages
publisher
Oldenbourg Verlag
external identifiers
  • scopus:33745853530
ISSN
0044-2968
DOI
10.1524/zkri.2006.221.5-7.391
language
English
LU publication?
no
id
830f485a-0d08-4e95-9710-05a3178cd320
date added to LUP
2019-04-08 15:19:22
date last changed
2020-07-16 03:18:44
@article{830f485a-0d08-4e95-9710-05a3178cd320,
  abstract     = {<p>For the RE<sub>13</sub>Zn<sub>58</sub> quasicrystal approximants (RE = Ce, Pr, Nd, Sm, Gd, Tb, Dy), single crystals were prepared from the elements and their structures were refined from single-crystal X-ray diffraction data. They are derived from the Gd<sub>13</sub>Cd<sub>58</sub> type structure and crystallize in the space group P6<sub>3</sub>/mmc or its subgroups. The crystal structures of Ce and Pr compounds are identical to that of the archetype, in the Nd compound a pair exchange disorder changes the composition and for Sm a further, partially occupied interstitial position lowers the symmetry to P6 <sub>3</sub>mc. For the compounds with Gd, Tb and Dy, the occupancy may order, lowering the symmetry further. For the case of Tb<sub>13</sub>Zn<sub>59</sub> high quality single crystals allowed us to refine the fully ordered orthorhombic super structure.</p>},
  author       = {Piao, Shuying and Gómez, Cesar Pay and Lidin, Sven},
  issn         = {0044-2968},
  language     = {eng},
  month        = {07},
  number       = {5-7},
  pages        = {391--401},
  publisher    = {Oldenbourg Verlag},
  series       = {Zeitschrift fur Kristallographie},
  title        = {Complexity of hexagonal approximates in the RE<sub>13</sub>Zn <sub>∼58</sub> system (RE = Ce, Pr, Nd, Sm, Gd, Tb and Dy)},
  url          = {http://dx.doi.org/10.1524/zkri.2006.221.5-7.391},
  doi          = {10.1524/zkri.2006.221.5-7.391},
  volume       = {221},
  year         = {2006},
}