Over the past decade new insights into the chemistry and mineralogy of the terrestrial planets and the Moon have been obtained using a variety of techniques.Increasingly sophisticated remote sensing and in-situ analysis of surface compositions and interior properties, earth-based analyses of meteorites and lunar samples, high-pressure experiments simulating the conditions within terrestrial bodies, and computational studies including numerical modelling have all contributed a wealth of new information. In this session we would like to bring together these different disciplines to summarize, compare and discuss the latest observations and models, to gain a more complete understanding of the evolution of inner solar system bodies. We invite contributions from experimental studies on phase relations and physico-chemical properties of minerals and melts at high pressures and temperatures, from computational studies on the properties of high-presssure phases and the thermo-chemical evolution of planetary interiors, and from geochemical studies including geochronology and element/isotope partitioning.