Senior member of the University Institute of France, Chair of Mineralogy at the University Pierre & Marie Curie in Paris. Born in 1948, Georges Calas graduated from École normale supérieure de Saint-Cloud-Lyon and received a Doctorat d'État in Mineralogy from the University of Paris (1980). He obtained a CNRS research position in 1972, and was invited researcher at the Clarendon Laboratory (Oxford) and the Grant Institute of Earth Sciences (Edinburgh). He also volunteered for technical cooperation in Mexico (1974-1975). He was appointed full professor at the University Paris Diderot-Paris...