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Synthesis and Rietveld refinements of new ceramics Sr2CaFe2WO9 and Sr2PbFe2TeO9 perovskites

Authors
  • El Hachmi, Abdelhadi1
  • Tamraoui, Y.1, 2
  • Manoun, Bouchaib1, 2
  • Haloui, R.1
  • Elaamrani, M.A.1
  • Saadoune, I.3, 2
  • Bih, L.4
  • Lazor, P.5
Type
Published Article
Journal
Powder Diffraction
Publisher
Cambridge University Press (CUP)
Publication Date
Mar 14, 2018
Volume
33
Identifiers
DOI: 10.1017/s0885715618000222
Source
MyScienceWork
License
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Abstract

Ceramics of Sr2CaFe2WO9 and Sr2PbFe2TeO9 double perovskites have been prepared in polycrystalline form by solid-state technique, in the air. The crystalline structure was analyzed using X-ray powder diffraction (XRPD) at room temperature. Rietveld analysis of XRPD patterns show that both compounds adopt a tetragonal structure with space group I4/m, with unit cell parameters a = 5.5453(1) Å, c = 7.8389(1) Å for Sr2CaFe2WO9, and a = 5.5994(15) Å, c = 7.8979(30) Å for Sr2PbFe2TeO9. A certain degree of anti-site disordering of W and/or Te and Fe on the B –sites have been detected, indicating the presence of a partial amount of W and/or Te at Fe positions and vice versa.

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