Article (Scientific journals)
Structural investigations of neodymium incorporation in calcium stannate perovskite CaSnO3
Goethals, J.; Fourdrin, C.; Tarrida, M. et al.
2018In Physics and Chemistry of Minerals
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Keywords :
Calcium stannate; Neodymium; Perovskite; Raman spectroscopy; X-ray diffraction; Calcium; Single crystals; Solid state reactions; Tin; X ray diffraction; Electron microprobes; Powder X ray diffraction; Random distribution; Randomly distributed; Single crystal x-ray diffraction; Stannates; Structural investigation; Substitution mechanisms; Tin compounds
Abstract :
[en] Samples of calcium stannate perovskite (CaSnO3) doped with a variable Nd content were synthesized by solid-state reaction in the system (1 − x)CaSnO3 − xNd2O3. The synthesized compounds were characterized by means of electron microprobe, powder X-ray diffraction, single-crystal X-ray diffraction and µ-Raman spectroscopy. The incorporation of Nd in the CaSnO3Pbnm structure leads to the formation of a complex (Ca1 − 2x Nd2x)(Sn1 − xCax)O3 perovskite. The A sublattice contains a random distribution of Ca and Nd in the whole range of composition of this system. For x < 0.28, the structure is Pbnm with Ca and Sn randomly distributed in the B sublattice. For x > 0.28 a symmetry change occurs; the structure turns into rock salt type P21/n. In this latter case half of the octahedral sites are fully occupied by Sn and the other half is randomly occupied by Sn and Ca. For x = 0.28, both structures are present in the sample. The presence of a Raman two modes behavior of A1g symmetry located near 700 cm− 1 coupled with the continuous linear evolution of the lattice parameters with Nd incorporation supports the proposed substitution mechanism. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Goethals, J.;  Université Paris-Est, LGE (EA 4508), UPEMLV, Marne-la-Vallée, France
Fourdrin, C.;  Université Paris-Est, LGE (EA 4508), UPEMLV, Marne-la-Vallée, France
Tarrida, M.;  Université Paris-Est, LGE (EA 4508), UPEMLV, Marne-la-Vallée, France
Bedidi, A.;  Université Paris-Est, LGE (EA 4508), UPEMLV, Marne-la-Vallée, France
Hatert, Frédéric  ;  Université de Liège - ULiège > Département de géologie > Minéralogie et cristallochimie
Rossano, S.;  Université Paris-Est, LGE (EA 4508), UPEMLV, Marne-la-Vallée, France
Language :
English
Title :
Structural investigations of neodymium incorporation in calcium stannate perovskite CaSnO3
Publication date :
2018
Journal title :
Physics and Chemistry of Minerals
ISSN :
0342-1791
eISSN :
1432-2021
Publisher :
Springer Verlag
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 09 March 2020

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