Standard Gibbs energies of formation of SrCrO4 and Sr3Cr2O8

Authors
Maruyama, T Inoue, T Akashi, T
Citation
T. Maruyama et al., Standard Gibbs energies of formation of SrCrO4 and Sr3Cr2O8, MATER T JIM, 39(11), 1998, pp. 1158-1161
Citations number
6
Categorie Soggetti
Metallurgy
Journal title
MATERIALS TRANSACTIONS JIM
ISSN journal
09161821 → ACNP
Volume
39
Issue
11
Year of publication
1998
Pages
1158 - 1161
Database
ISI
SICI code
0916-1821(199811)39:11<1158:SGEOFO>2.0.ZU;2-6
Abstract
The electromotive force of oxygen concentration cell, Pt, O-2(SrCrO4, Sr3Cr2O8, Cr2O3) / Y2O3-stabilized ZrO2/O-2 (air), was measured at temperatures between 1073 and 1423 K. The tensiometric meas urement on the reaction of SrCO3+2SrCrO(4)-reversible-arrow-Sr3Cr2O8+CO2+(1/2)O-2 was carried out at temperatures between 980 and 1300 K. From these results, the standard Gibbs energy of formation of SrCrO4 and Sr3Cr2O8 have been ob tained as Delta-G(f(SrCrO4)-degrees / kJ mol(-1)=-1493+4.17x10(-1)T (+/-3) and Delta-G(f(Sr3Cr2O8))-degrees / kJ mol(-1)=-3598+9.38x10(-1)T (+/- 7), respectively.