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Single-crystal growth and structure determination of misfit layer oxide [Sr2TlO3][CoO2]1.77

Valkeapää, Markus ; Valldor, Martin ; Lidin, Sven LU ; Lada, Tomasz ; Morawski, Andrzej and Eriksson, Sten LU (2007) In Journal of Crystal Growth 306(1). p.233-239
Abstract

We have synthesized single crystals of the misfit layer cobaltate [Sr2TlO3][CoO2]1.77 and determined its crystal structure by the means of X-ray single-crystal diffraction (XRSD) and transmission electron microscopy. The synthesis took place by spontaneous crystallization from an oxide melt at high gaseous pressure. The structure is described by two monoclinic subsystems, which share the unit cell parameters, a=4.933(5) Å, c=11.470(12) Å, and β=98.00(10)°, but are incommensurate in the direction of b-axes: b1=5.009(8) Å and b2=2.830(8) Å, where b1 is for the subsystem [Sr2TlO3] and b2 for [CoO2]. The layer sequence in... (More)

We have synthesized single crystals of the misfit layer cobaltate [Sr2TlO3][CoO2]1.77 and determined its crystal structure by the means of X-ray single-crystal diffraction (XRSD) and transmission electron microscopy. The synthesis took place by spontaneous crystallization from an oxide melt at high gaseous pressure. The structure is described by two monoclinic subsystems, which share the unit cell parameters, a=4.933(5) Å, c=11.470(12) Å, and β=98.00(10)°, but are incommensurate in the direction of b-axes: b1=5.009(8) Å and b2=2.830(8) Å, where b1 is for the subsystem [Sr2TlO3] and b2 for [CoO2]. The layer sequence in the structure consists of CdI2-type structured (CoO2)∞ and three puckered rock-salt (RS) layers, two of which are (SrO)∞ and one (TlO)∞. The solved structure confirms that the thermoelectric compounds [Ca2CoO3][CoO2]1.62 (Co-121) and [Sr2TlO3][CoO2]1.77 (Tl-121) are isostructural.

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author
; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
keywords
A1. Crystal structure, A1. X-ray diffraction, A2. Growth at high pressure, A2. Growth from melt, A2. Single-crystal growth, B1. Misfit layer compounds, B1. Oxides
in
Journal of Crystal Growth
volume
306
issue
1
pages
7 pages
publisher
Elsevier
external identifiers
  • scopus:34447536398
ISSN
0022-0248
DOI
10.1016/j.jcrysgro.2007.05.003
language
English
LU publication?
no
id
66706dde-320b-4cfb-9ca7-ed51959a2565
date added to LUP
2019-04-08 15:15:34
date last changed
2022-01-31 18:46:46
@article{66706dde-320b-4cfb-9ca7-ed51959a2565,
  abstract     = {{<p>We have synthesized single crystals of the misfit layer cobaltate [Sr<sub>2</sub>TlO<sub>3</sub>][CoO<sub>2</sub>]<sub>1.77</sub> and determined its crystal structure by the means of X-ray single-crystal diffraction (XRSD) and transmission electron microscopy. The synthesis took place by spontaneous crystallization from an oxide melt at high gaseous pressure. The structure is described by two monoclinic subsystems, which share the unit cell parameters, a=4.933(5) Å, c=11.470(12) Å, and β=98.00(10)°, but are incommensurate in the direction of b-axes: b<sub>1</sub>=5.009(8) Å and b<sub>2</sub>=2.830(8) Å, where b<sub>1</sub> is for the subsystem [Sr<sub>2</sub>TlO<sub>3</sub>] and b<sub>2</sub> for [CoO<sub>2</sub>]. The layer sequence in the structure consists of CdI<sub>2</sub>-type structured (CoO<sub>2</sub>)<sub>∞</sub> and three puckered rock-salt (RS) layers, two of which are (SrO)<sub>∞</sub> and one (TlO)<sub>∞</sub>. The solved structure confirms that the thermoelectric compounds [Ca<sub>2</sub>CoO<sub>3</sub>][CoO<sub>2</sub>]<sub>1.62</sub> (Co-121) and [Sr<sub>2</sub>TlO<sub>3</sub>][CoO<sub>2</sub>]<sub>1.77</sub> (Tl-121) are isostructural.</p>}},
  author       = {{Valkeapää, Markus and Valldor, Martin and Lidin, Sven and Lada, Tomasz and Morawski, Andrzej and Eriksson, Sten}},
  issn         = {{0022-0248}},
  keywords     = {{A1. Crystal structure; A1. X-ray diffraction; A2. Growth at high pressure; A2. Growth from melt; A2. Single-crystal growth; B1. Misfit layer compounds; B1. Oxides}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{1}},
  pages        = {{233--239}},
  publisher    = {{Elsevier}},
  series       = {{Journal of Crystal Growth}},
  title        = {{Single-crystal growth and structure determination of misfit layer oxide [Sr<sub>2</sub>TlO<sub>3</sub>][CoO<sub>2</sub>]<sub>1.77</sub>}},
  url          = {{http://dx.doi.org/10.1016/j.jcrysgro.2007.05.003}},
  doi          = {{10.1016/j.jcrysgro.2007.05.003}},
  volume       = {{306}},
  year         = {{2007}},
}