Proceedings contains material General information; Introduction;Thorium chalcogenides; Protactinium chalcogenides; Uranium chalcogenides; Neptunium chalcogenides; Plutonium chalcogenidesplutonium chalcogenides; Thermodynamic properties of the chalcogens; Physical properties of the actinide chalcogenides; Heat-capacity contributions fro a population of exited electronic states in the actinides; …