Galvanic cells with CaF2 as solid electrolytes were used to obtain the thermodynamic properties of the gold-erbium system between 973 and 1073 K. A complete set of thermodynamic data was obtained for the gold-rich solid solution and for the intermetallic compounds Au4Er, Au3Er, Au2Er, AuEr and AuEr2. The relative partial excess Gibbs energy of erbium at infinite dilution was determined to be -257 kJ/mol at 1073 K. Electronic and elastic effects are discussed in order to account for the pronounced deviations from ideality. (C) 2000 Elsevier Science S.A. All rights reserved.
Solubility of hydrogen in CsCl-type group Ib-Erbium alloys XEr (X ≡ Cu, Ag, Au)