Measurements of the Standard Free Energies of Formation of Sb<SUB>2</SUB>O<SUB>3</SUB>, GeO<SUB>2</SUB> and In<SUB>2</SUB>O<SUB>3</SUB> by Electrochemical Method

Abstract

E.M.F. of galvanic cells with the solid electrolyte (ZrO2+CaO) was measured to determine the standard molar free energies of formation of Sb2O3, GeO2 (hexagonal), GeO2 (tetragonal) and In2O3. The cells used were as follows:(This article is not displayable. Please see full text pdf.) \ oindentThe results were represented by the following equations:(This article is not displayable. Please see full text pdf.) \ oindentand they were compared with previously reported values. In the In-O system, e.m.f. corresponding to the formation of solid In2O were not obtained by the titration method.