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ChemInform Abstract: X-Ray and Neutron Rietveld Analysis of the Solid Solutions (1-x)Ln2Ti2O7×xMgTiO3 (Ln: Y or Eu).

✍ Scribed by E. CHTOUN; L. HANEBALI; P. GARNIER; J. M. KIAT

Publisher
John Wiley and Sons
Year
2010
Weight
40 KB
Volume
29
Category
Article
ISSN
0931-7597

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✦ Synopsis

1998 structure structure (solids and liquids) D 2000 04 -005 X-Ray and Neutron Rietveld Analysis of the Solid Solutions (1x)Ln 2 Ti 2 O 7 •xMgTiO 3 (Ln: Y or Eu).

-Powder samples of the novel solid solutions in the composition range (1-x)Ln 2 Ti 2 O 7 • xMgTiO 3 (Ln:Y, x = 0-0.4; Ln: Eu, x = 0-0.55) are prepared by reaction of Ln 2 O 3 , TiO 2 , and Mg by sequential heating to 1050 • C and the structures of the samples Ln 2(1-x ) Mg 2x Ti 2 O 7-x (x' = x/2-x) with Ln: Y, x' = 0.20, i.e. x = 0.33 and Ln: Eu, x' = 0.33, i.e. x = 0.50 are analyzed by neutron and X-ray diffraction methods. In these solid solutions which crystallize with pyrochlore structure (cubic, Fd3m), Mg 2+ substitutes for Ln 3+ ions creating vacancies in the anionic sublattice.

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