Cation order/disorder and local structures in alkaline earth pyrochlores
نویسندگان
چکیده
منابع مشابه
A comparison of the local magnetic susceptibility in rare earth pyrochlores
We report transverse field muon spin rotation studies of the rare earth pyrochlores Gd2Ti2O7 and Tb2Ti2O7: The paramagnetic shift in the observed precession frequency depends on the local spin susceptibility and probes the contact hyperfine and dipolar fields at the muon site within these materials. The results are compared with measurements of the bulk susceptibility. While no features associa...
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Goursat structures are the dual objects of E. Cartan's \special" systems (also called \en drapeau" in 7]). We prove that the growth vector is not a complete local invariant for a Goursat structure on R n , n 9; and that there exist innnitely many locally non-equivalent Goursat structures on R n , n 10. Sur la classiication locale des structures de Goursat Les structures de Goursat sont les obje...
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The surface properties of fatty acid and fatty acid-alcohol mixtures were examined at 22-24 degrees C. At pH 12, sodium stearate forms a rigid surface film that generates an equilibrium spreading pressure of 16.5 dynes/cm. At pH 12, stearate-alkaline earth cation films collapse at the air-water interface and do not generate significant equilibrium spreading pressures. The rate of film collapse ...
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‘?Si NMR spectroscopy provides important contributions to the understanding of silicate glass structure. as the resonance frequency is sensitive to several aspects of the local chemical environment (including intertetrahedral bond angles. bond distances. and number of bridging oxygens per silicon atom). New data on a series of binary alkali and alkaline earth glasses are presented which highlig...
متن کاملStatic magnetic susceptibility, crystal field and exchange interactions in rare earth titanate pyrochlores.
The experimental temperature dependence (T = 2-300 K) of single crystal bulk and site susceptibilities of rare earth titanate pyrochlores R(2)Ti(2)O(7) (R = Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb) is analyzed in the framework of crystal field theory and a mean field approximation. Analytical expressions for the site and bulk susceptibilities of the pyrochlore lattice are derived taking into account lon...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section A Foundations of Crystallography
سال: 2008
ISSN: 0108-7673
DOI: 10.1107/s0108767308083542