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- W1569257020 abstract "This chapter discusses valence changes in rare earth compounds under the influence of pressure, substitution, and temperature and also discusses some of the theoretical ideas that are currently in vogue. The experimental and theoretical aspects of the valence changes mainly in rare earth monochalcogenides have been reviewed by Jayaraman et al., Varma, by Campagna et al., and by Suryanarayanan. Some of the other materials known to exhibit valence fluctuations are discussed along with the monochalcogenides, these include SmB6, EUCu2Si2. Among the compounds, SmB6 has earned certain notoriety as a system exhibiting a change in the valence state; the Sm ions are in the higher valence state at room temperature but change toward the lower state upon lowering the temperature. A number of rare earth alloys and compounds involving Ce, Sm, Eu, Yb and the disilicides (EuM2Si2) where M is Fe, Cu or Ag, undergo valence changes with temperature at ambient pressure and exhibit a fluctuating valence state." @default.
- W1569257020 created "2016-06-24" @default.
- W1569257020 creator A5007393252 @default.
- W1569257020 date "1979-01-01" @default.
- W1569257020 modified "2023-09-25" @default.
- W1569257020 title "Chapter 20 Valence changes in compounds" @default.
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- W1569257020 doi "https://doi.org/10.1016/s0168-1273(79)02011-0" @default.
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