Synthesis, crystal structure, spectroscopic properties, and thermal behavior of rare-earth oxide selenates, Ln2O2SeO4 (Ln = La, Pr, Nd): The new perspectives of solid-state double-exchange synthesis

Dmitri O. Charkin, Andrey S. Karpov, Sergey M. Kazakov, Igor V. Plokhikh, Anastasiya I. Zadoya, Alexey N. Kuznetsov, Konstantin I. Maslakov, Anton Yu Teterin, Yury A. Teterin, Alexander N. Zaloga, Oleg I. Siidra

Research output

Abstract

Three rare-earth oxide selenates Ln2O2SeO4 (Ln = La, Pr, Nd) have been prepared via double-exchange solid-state reactions between respective LnOCl oxyhalides and potassium selenate. This approach succeeded to obtain single-phase specimens of La2O2SeO4 and Nd2O2SeO4, previously known as transients upon thermal decomposition of the corresponding selenates, as well as a new compound Pr2O2SeO4. Refinement of their crystal structures from powder X-ray diffraction data confirmed previous attributions to the grandreefite (Pb2F2SO4) structure type observed also for the Ln2O2SO4 oxide sulfates. According to polythermic X-ray studies, La2O2SeO4 is stable until at least 700 °C. All compounds were characterized by infrared and X-ray photoelectron spectroscopy.

Original languageEnglish
Pages (from-to)163-168
JournalJournal of Solid State Chemistry
Volume277
Early online date6 Jun 2019
DOIs
Publication statusPublished - 1 Sep 2019

Fingerprint

Selenic Acid
Oxides
Rare earths
Ion exchange
rare earth elements
Crystal structure
solid state
crystal structure
oxides
synthesis
oxyhalides
Solid state reactions
X ray powder diffraction
Potassium
Pyrolysis
x rays
X ray photoelectron spectroscopy
Infrared radiation
X rays
Sulfates

Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Charkin, Dmitri O. ; Karpov, Andrey S. ; Kazakov, Sergey M. ; Plokhikh, Igor V. ; Zadoya, Anastasiya I. ; Kuznetsov, Alexey N. ; Maslakov, Konstantin I. ; Teterin, Anton Yu ; Teterin, Yury A. ; Zaloga, Alexander N. ; Siidra, Oleg I. / Synthesis, crystal structure, spectroscopic properties, and thermal behavior of rare-earth oxide selenates, Ln2O2SeO4 (Ln = La, Pr, Nd) : The new perspectives of solid-state double-exchange synthesis. In: Journal of Solid State Chemistry. 2019 ; Vol. 277. pp. 163-168.
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abstract = "Three rare-earth oxide selenates Ln2O2SeO4 (Ln = La, Pr, Nd) have been prepared via double-exchange solid-state reactions between respective LnOCl oxyhalides and potassium selenate. This approach succeeded to obtain single-phase specimens of La2O2SeO4 and Nd2O2SeO4, previously known as transients upon thermal decomposition of the corresponding selenates, as well as a new compound Pr2O2SeO4. Refinement of their crystal structures from powder X-ray diffraction data confirmed previous attributions to the grandreefite (Pb2F2SO4) structure type observed also for the Ln2O2SO4 oxide sulfates. According to polythermic X-ray studies, La2O2SeO4 is stable until at least 700 °C. All compounds were characterized by infrared and X-ray photoelectron spectroscopy.",
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Synthesis, crystal structure, spectroscopic properties, and thermal behavior of rare-earth oxide selenates, Ln2O2SeO4 (Ln = La, Pr, Nd) : The new perspectives of solid-state double-exchange synthesis. / Charkin, Dmitri O.; Karpov, Andrey S.; Kazakov, Sergey M.; Plokhikh, Igor V.; Zadoya, Anastasiya I.; Kuznetsov, Alexey N.; Maslakov, Konstantin I.; Teterin, Anton Yu; Teterin, Yury A.; Zaloga, Alexander N.; Siidra, Oleg I.

In: Journal of Solid State Chemistry, Vol. 277, 01.09.2019, p. 163-168.

Research output

TY - JOUR

T1 - Synthesis, crystal structure, spectroscopic properties, and thermal behavior of rare-earth oxide selenates, Ln2O2SeO4 (Ln = La, Pr, Nd)

T2 - The new perspectives of solid-state double-exchange synthesis

AU - Charkin, Dmitri O.

AU - Karpov, Andrey S.

AU - Kazakov, Sergey M.

AU - Plokhikh, Igor V.

AU - Zadoya, Anastasiya I.

AU - Kuznetsov, Alexey N.

AU - Maslakov, Konstantin I.

AU - Teterin, Anton Yu

AU - Teterin, Yury A.

AU - Zaloga, Alexander N.

AU - Siidra, Oleg I.

PY - 2019/9/1

Y1 - 2019/9/1

N2 - Three rare-earth oxide selenates Ln2O2SeO4 (Ln = La, Pr, Nd) have been prepared via double-exchange solid-state reactions between respective LnOCl oxyhalides and potassium selenate. This approach succeeded to obtain single-phase specimens of La2O2SeO4 and Nd2O2SeO4, previously known as transients upon thermal decomposition of the corresponding selenates, as well as a new compound Pr2O2SeO4. Refinement of their crystal structures from powder X-ray diffraction data confirmed previous attributions to the grandreefite (Pb2F2SO4) structure type observed also for the Ln2O2SO4 oxide sulfates. According to polythermic X-ray studies, La2O2SeO4 is stable until at least 700 °C. All compounds were characterized by infrared and X-ray photoelectron spectroscopy.

AB - Three rare-earth oxide selenates Ln2O2SeO4 (Ln = La, Pr, Nd) have been prepared via double-exchange solid-state reactions between respective LnOCl oxyhalides and potassium selenate. This approach succeeded to obtain single-phase specimens of La2O2SeO4 and Nd2O2SeO4, previously known as transients upon thermal decomposition of the corresponding selenates, as well as a new compound Pr2O2SeO4. Refinement of their crystal structures from powder X-ray diffraction data confirmed previous attributions to the grandreefite (Pb2F2SO4) structure type observed also for the Ln2O2SO4 oxide sulfates. According to polythermic X-ray studies, La2O2SeO4 is stable until at least 700 °C. All compounds were characterized by infrared and X-ray photoelectron spectroscopy.

KW - Crystal structure

KW - Double-exchange solid state reactions

KW - Rare-earth compounds

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