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Thermoelectric Determination of Cation Distributions in Fe304‐MgFe204
Author(s) -
TRESTMANMATTS A.,
DORRIS S. E.,
MASON T. O.
Publication year - 1984
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1984.tb19151.x
Subject(s) - thermoelectric effect , thermodynamics , seebeck coefficient , tetrahedron , magnesium , analytical chemistry (journal) , materials science , chemistry , mineralogy , crystallography , metallurgy , physics , chromatography
Thermoelectric coefficient measurements in the system Fe 3 0 4 ‐MgFe 2 0 4 were used to determine the cation distributions from 600° to 1300°C. The cation distributions obeyed the relationship: − RT ln K Mg CD = 17.4 + 2(−16.4) b (kJ/mol) where K Mg CD is the magnesium distribution constant and b is the tetrahedral Fe 3+ concentration. Low‐temperature distributions are consistent with electrical behavior in the system. High‐temperature thermodynamic activities calculated from our distributions agree with experimental values.