New Crystallographic Developments Applicable in Studies of Reactions in Solids (Introductory Lecture).- Reactions at Surfaces and Interfaces (Plenary Lecture).- Reaction Kinetics in the Ca-Mn-O System.- Surface Reactivity Towards Olefin Oxidation of Cadmium Molybdate Doped with Transition Metal Ions.- Chemisorption of Sulfur on Iron and Its Influence on Iron-Gas Reactions, Surface Self Diffusion and Sintering of Iron.- The Influence of Intrinsic Defects on the Mechanism of the Solid State Reaction Between CdTe and HgSe.- Characterization and Surface Reactivity of Finely-Divided CoO-MgO Solid Solutions.- The Reactivity of Some Tungsten Oxides.- The Growth of Oxide Crystallites During the Oxidation of Iron in Carbon Dioxide Within the Scanning Electron Microscope.- The Reactivity of Metal Oxides and Sulfides with Lithium at 25?C The Critical Role of Topotaxy.- On the Reaction Between Silver and Copper Iodide in Thin Evaporated Films.- Oxygen Diffusion in Strontium Titanate Studied by Solid/Gas Isotope Exchange.- Oxidation Behaviour of Zirconium Nitride in Oxygen.- Oxidation Behaviour of Nickel Tellurides in the Composition Region Between NiTe0.8 and NiTe2.0.- Reactions and Equilibrium Wetting in Titanium Molten Glass Systems.- Oxidation Kinetics Study of Finely-Divided Magnetites Substituted for Aluminium and Chromium.- Crystalline Solid Rearrangement Brought About by Gas Removal. Shape and Size of the Crystallites Obtained.- Peroxide and Superoxide as Catalysts. A Model Based on Molten Salts Experiments.- Carbon Formation on Ni Foils by Pyrolysis of Propene (290?800?C).- Oxidation Reaction of Chromium Oxide (Cr2O3) in the Presence of MM?O3 (M : Ca, Sr, Ba; M?: Ti, Zr).- Influence of a Foreign Gas in Heterogeneous Reactions.- About the Use of a Solid State Electro-Chemical Oxygen Pump for Selective Oxidation of Organic Materials.- On the High Temperature Reactivity in Air of Some Metal Powders and Their Relationship with the Self-Sealing Coatings for the Protectiló,