Volume 2 of Reviews in Mineralogy displays the Short Course on Feldspar Mineralogy in Salt Lake
City in October 1975. The workshops on x-ray single-crystal powder diffraction methods and
electron optical techniques as applied to the study of feldspars are the substance of which
became the nine chapters of the first edition of Feldspar Mineralogy.It will be noted by
readers experienced with feldspars that there are many new ideas appearing in Chapters 3 4 and
5 that have neither received scrutiny by review (other than ourselves) nor survived practical
tests of time in the research community. There is some danger in this but the editor decided
the greater risk was to produce a review volume soon to be outdated. Inevitably given the
different goals of individual authors in their assigned topics some repetition of material has
occurred although usually with quite different emphases. Chapters 1 2 9 and 10 in which
plagioclase structures and diffraction patterns and their Al Si distributions phase equilibria
and exsolution textures are featured are notable in this regard.
