Volume 25 of Reviews in Mineralogy was published to be used as the textbook for the Short
Course on Fe-Ti Oxides: Their Petrologic and Magnetic Significance held May 24-27 1991
organized by B.R. Frost D.H. Lindsley and SK Banerjee and jointly sponsored by the
Mineralogical Society of America and the American Geophysical Union.It has been fourteen and a
half years since the last MSA Short Course on Oxide Minerals and the appearance of Volume 3 of
Reviews in Mineralogy. Much progress has been made in the interim. This is particularly evident
in the coverage of the thermodynamic properties of oxide minerals: nothing in Volume 3 while
in contrast Volume 25 has three chapters (6 7 and 8) presenting various aspects of the
thermodynamics of oxide minerals and other chapters (9 11 12) build extensively on
thermodynamic models. The coverage of magnetic properties has also been considerably expanded
(Chapters 4 8 and 14). Finally the interaction of oxides and silicates is emphasized in
Chapters 9 11 12 13 and 14. Because Volume 3 is out of print and will not be readily
available to newcomers to our science as much as possible we have tried to make Volume 25 a
replacement for rather than a supplement to the earlier volume. Chapters on crystal chemistry
phase equilibria and oxide minerals in both igneous and metamorphic rocks have been rewritten
or extensively revised.