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New strontium and rare earth-based mixed niobium misfit sulfides

Grippa, Alexander Yu ; Lidin, Sven LU ; Svensson, Gunnar LU ; Rupasov, Dmitry P. ; Khasanova, Nellie R. ; D'yachenko, Oleg G. and Antipov, Evgeny V. (2003) In Solid State Sciences 5(3). p.495-502
Abstract

New niobium-based misfit sulfides (Ln1/3Sr2/3S)1.5]1.15 NbS2 (Ln = Sm, Tb) have been synthesized from a mixture of SrS, Ln2S3, Nb(m), and S in evacuated and sealed silica tubes by annealing at 1000 °C for 144 h under a sulfur partial pressure of 49.3 kPa. The compounds have been characterized by EDX analysis, X-ray single crystal and powder diffraction, electron diffraction, and magnetic susceptibility measurements. Both sulfides have misfit structures with orthorhombic symmetry for the (Ln1/3Sr2/3S)1.5 (Ln = Sm, Tb) and NbS2 subsystems. The lattice parameters for the different subsystems are: for the Sm-based sulfide... (More)

New niobium-based misfit sulfides (Ln1/3Sr2/3S)1.5]1.15 NbS2 (Ln = Sm, Tb) have been synthesized from a mixture of SrS, Ln2S3, Nb(m), and S in evacuated and sealed silica tubes by annealing at 1000 °C for 144 h under a sulfur partial pressure of 49.3 kPa. The compounds have been characterized by EDX analysis, X-ray single crystal and powder diffraction, electron diffraction, and magnetic susceptibility measurements. Both sulfides have misfit structures with orthorhombic symmetry for the (Ln1/3Sr2/3S)1.5 (Ln = Sm, Tb) and NbS2 subsystems. The lattice parameters for the different subsystems are: for the Sm-based sulfide [(SM1/3Sr2/3S)1.51]: a 5.7953(9) Å, b = 5.8007(5) Å, c = 14.957(2) Å and [NbS2]: a = 3.3420(7) Å, b = 5.8008(5) Å, c = 14.955(2) Å, and for the Tb-based sulfide [(Th1/3Sr2/3S)1.5]: a = 5.769(2) Å, b = 5.7766(7) Å, c = 14.906(2) Å and [NbS2]: a = 3.340(1) Å, b = 5.7769(8) Å, c = 14.905(2) Å. The [(SM1/3Sr2/3S)1.15NbS2 crystal structure has been refined from X-ray single crystal data. It belongs to the 1.5Q/1H homologue type where the (Sm1/3Sr2/3S)1.5 part is a three-atoms-thick slab. Sr-cations are mainly located at the exterior of the slab whereas Sm preferably occupy the positions at its center. Both compounds exhibit paramagnetic temperature dependence down to 2 K.

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publishing date
type
Contribution to journal
publication status
published
keywords
Crystal structure, Electron diffraction, Niobium-based misfit sulfides, Synthesis
in
Solid State Sciences
volume
5
issue
3
pages
8 pages
publisher
Elsevier
external identifiers
  • scopus:0038709724
ISSN
1293-2558
DOI
10.1016/S1293-2558(03)00023-2
language
English
LU publication?
no
id
d7659539-25ba-4727-a130-90bd96a639ec
date added to LUP
2019-04-08 15:31:03
date last changed
2022-01-31 18:51:58
@article{d7659539-25ba-4727-a130-90bd96a639ec,
  abstract     = {{<p>New niobium-based misfit sulfides (Ln<sub>1/3</sub>Sr<sub>2/3</sub>S)<sub>1.5</sub>]<sub>1.15</sub> NbS<sub>2</sub> (Ln = Sm, Tb) have been synthesized from a mixture of SrS, Ln<sub>2</sub>S<sub>3</sub>, Nb(m), and S in evacuated and sealed silica tubes by annealing at 1000 °C for 144 h under a sulfur partial pressure of 49.3 kPa. The compounds have been characterized by EDX analysis, X-ray single crystal and powder diffraction, electron diffraction, and magnetic susceptibility measurements. Both sulfides have misfit structures with orthorhombic symmetry for the (Ln<sub>1/3</sub>Sr<sub>2/3</sub>S)<sub>1.5</sub> (Ln = Sm, Tb) and NbS<sub>2</sub> subsystems. The lattice parameters for the different subsystems are: for the Sm-based sulfide [(SM<sub>1/3</sub>Sr<sub>2/3</sub>S)<sub>1.51</sub>]: a 5.7953(9) Å, b = 5.8007(5) Å, c = 14.957(2) Å and [NbS<sub>2</sub>]: a = 3.3420(7) Å, b = 5.8008(5) Å, c = 14.955(2) Å, and for the Tb-based sulfide [(Th<sub>1/3</sub>Sr<sub>2/3</sub>S)<sub>1.5</sub>]: a = 5.769(2) Å, b = 5.7766(7) Å, c = 14.906(2) Å and [NbS<sub>2</sub>]: a = 3.340(1) Å, b = 5.7769(8) Å, c = 14.905(2) Å. The [(SM<sub>1/3</sub>Sr<sub>2/3</sub>S)<sub>1.15</sub>NbS<sub>2</sub> crystal structure has been refined from X-ray single crystal data. It belongs to the 1.5Q/1H homologue type where the (Sm<sub>1/3</sub>Sr<sub>2/3</sub>S)<sub>1.5</sub> part is a three-atoms-thick slab. Sr-cations are mainly located at the exterior of the slab whereas Sm preferably occupy the positions at its center. Both compounds exhibit paramagnetic temperature dependence down to 2 K.</p>}},
  author       = {{Grippa, Alexander Yu and Lidin, Sven and Svensson, Gunnar and Rupasov, Dmitry P. and Khasanova, Nellie R. and D'yachenko, Oleg G. and Antipov, Evgeny V.}},
  issn         = {{1293-2558}},
  keywords     = {{Crystal structure; Electron diffraction; Niobium-based misfit sulfides; Synthesis}},
  language     = {{eng}},
  month        = {{03}},
  number       = {{3}},
  pages        = {{495--502}},
  publisher    = {{Elsevier}},
  series       = {{Solid State Sciences}},
  title        = {{New strontium and rare earth-based mixed niobium misfit sulfides}},
  url          = {{http://dx.doi.org/10.1016/S1293-2558(03)00023-2}},
  doi          = {{10.1016/S1293-2558(03)00023-2}},
  volume       = {{5}},
  year         = {{2003}},
}