International Scholarly Research Notices

Research Article

Estimating Free Energies of Formation of Titanate ( M 𝟐 T i 𝟐 O 𝟕 ) and Zirconate ( M 𝟐 Z r 𝟐 O 𝟕 ) Pyrochlore Phases of Trivalent Lanthanides and Actinides

Figure 4

A relationship for entropy of formation from oxides ( Δ 𝑆 0 𝑓 , O X ) in J/mol K and the empirical oxygen affinity parameter ( Δ 𝑆 M 3 + ) in J/mol K shown for the titanate pyrochlore ( M 2 T i 2 O 7 ) family. The relationship is estimated as Δ 𝑆 0 𝑓 , O X = 5 8 . 4 7 − 0 . 2 1 6 2 Δ 𝑆 M 3 + . Standard molar entropies of the oxides and that of aqueous cations are from [32, 33], respectively.
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