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LaSeTe2 - Temperature Dependent Structure Investigation and Electron Holography on a Charge-Density-Wave-Hosting Compound

Doert, Thomas ; Fokwa, Boniface Polequin Tsinde ; Simon, Paul ; Lidin, Sven LU and Söhnel, Tilo (2003) In Chemistry - A European Journal 9(23). p.5865-5872
Abstract

Single crystals of LaSeTe2 have been prepared by reaction of the elements in a LiCl/RbCl flux at 970 K for seven days. Satellite reflections observed in diffraction experiments indicate the presence of an incommensurate lattice distortion, which is of the charge-density-wave (CDW) type. The modulated structure has been solved from X-ray data at 173, 293, and 373 K. LaSeTe2 crystallizes in the 3+1-dimensional orthorhombic superspace group Cmcm(00γ)s00 (No. 63.2) with lattice parameters of a = 4.295(1), b = 25.371(4), c = 4.306(1) Å (173K), a = 4.297(1), b = 25.408(4), c = 4.309(1) Å (293 K), and a = 4.309(1), b = 25.481(6), c = 4,321(1) Å (373 K). The modulation vector q = (0, 0, 0.288) does not change over the... (More)

Single crystals of LaSeTe2 have been prepared by reaction of the elements in a LiCl/RbCl flux at 970 K for seven days. Satellite reflections observed in diffraction experiments indicate the presence of an incommensurate lattice distortion, which is of the charge-density-wave (CDW) type. The modulated structure has been solved from X-ray data at 173, 293, and 373 K. LaSeTe2 crystallizes in the 3+1-dimensional orthorhombic superspace group Cmcm(00γ)s00 (No. 63.2) with lattice parameters of a = 4.295(1), b = 25.371(4), c = 4.306(1) Å (173K), a = 4.297(1), b = 25.408(4), c = 4.309(1) Å (293 K), and a = 4.309(1), b = 25.481(6), c = 4,321(1) Å (373 K). The modulation vector q = (0, 0, 0.288) does not change over the temperature interval. Electron holographic investigations confirm the existence of the modulation and help to visualize the charge-density wave.

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author
; ; ; and
publishing date
type
Contribution to journal
publication status
published
keywords
Charge-density wave, Electron holography, Lanthanides, Polychalcogenides, Solid-state structure
in
Chemistry - A European Journal
volume
9
issue
23
pages
8 pages
publisher
Wiley-Blackwell
external identifiers
  • scopus:0346993135
ISSN
0947-6539
DOI
10.1002/chem.200305148
language
English
LU publication?
no
id
ee658112-4995-4ace-afcd-cd97f24773e7
date added to LUP
2019-04-08 15:29:30
date last changed
2022-01-31 18:51:58
@article{ee658112-4995-4ace-afcd-cd97f24773e7,
  abstract     = {{<p>Single crystals of LaSeTe<sub>2</sub> have been prepared by reaction of the elements in a LiCl/RbCl flux at 970 K for seven days. Satellite reflections observed in diffraction experiments indicate the presence of an incommensurate lattice distortion, which is of the charge-density-wave (CDW) type. The modulated structure has been solved from X-ray data at 173, 293, and 373 K. LaSeTe<sub>2</sub> crystallizes in the 3+1-dimensional orthorhombic superspace group Cmcm(00γ)s00 (No. 63.2) with lattice parameters of a = 4.295(1), b = 25.371(4), c = 4.306(1) Å (173K), a = 4.297(1), b = 25.408(4), c = 4.309(1) Å (293 K), and a = 4.309(1), b = 25.481(6), c = 4,321(1) Å (373 K). The modulation vector q = (0, 0, 0.288) does not change over the temperature interval. Electron holographic investigations confirm the existence of the modulation and help to visualize the charge-density wave.</p>}},
  author       = {{Doert, Thomas and Fokwa, Boniface Polequin Tsinde and Simon, Paul and Lidin, Sven and Söhnel, Tilo}},
  issn         = {{0947-6539}},
  keywords     = {{Charge-density wave; Electron holography; Lanthanides; Polychalcogenides; Solid-state structure}},
  language     = {{eng}},
  month        = {{12}},
  number       = {{23}},
  pages        = {{5865--5872}},
  publisher    = {{Wiley-Blackwell}},
  series       = {{Chemistry - A European Journal}},
  title        = {{LaSeTe<sub>2</sub> - Temperature Dependent Structure Investigation and Electron Holography on a Charge-Density-Wave-Hosting Compound}},
  url          = {{http://dx.doi.org/10.1002/chem.200305148}},
  doi          = {{10.1002/chem.200305148}},
  volume       = {{9}},
  year         = {{2003}},
}