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Gibbs Energy of Formation of Cu2Yb2O5and Thermodynamic Stability of Cu2R2O5(R= Tb–Lu)

✍ Scribed by G.M. Kale

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
264 KB
Volume
125
Category
Article
ISSN
0022-4596

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✦ Synopsis

sent in octahedral coordination. Based on this correlation, baum (3) and more recently by Garcia-Munoz and ⌬H, ⌬S, and ⌬G for the formation of Cu 2 Tb 2 O 5 , Cu 2 Tm 2 O 5 , Rodriguez-Carvajal (4). Garcia-Munoz and Rodringuezand Cu 2 Lu 2 O 5 from the component oxides have been esti-Carvajal (4) have recently applied the valence bond mated.

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Interplay between Cu and Fe Valences in BaR(Cu0.5Fe0.5)2O5+δ Double Perovskites with R=Lu, Yb, Y, Eu, Sm, Nd, and Pr
✍ J. Lindén; M. Kochi; K. Lehmus; T. Pietari; M. Karppinen; H. Yamauchi 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 389 KB

We have conducted a systematic 57 Fe MoK ssbauer study on BaR(Cu 0.5 Fe 0.5 ) 2 O 5؉ double perovskites with various oxygen contents and rare-earth elements (R ‫؍‬ Lu, Yb, Y, Eu, Sm, Nd, and Pr). In samples based on R ‫؍‬ Lu, Yb, Y, Eu, Sm the oxygen content remained at +0, upon reductive or oxidati