We are pleased to present to our readers the proceedings of the Seventh Internat ional Workshop on Phosphate and other Minerals which was held in Marsielle, France during September 1-4, 1985. It was hosted by Professor Michel Olmer, the Chief of the Divison of Nephrology in Hopital de la Conception of the University of D'Aix- Marsielle II. The workshop was attended by 250 scientists from 17 countries including Algeria, Austria, Belgium, Canada, Czechoslovakia, Democratic Republic of C'.ermany, Egypt, England, France, Israel, Italy, Japan, Spain, Switzerland and the United States of America....