The primary effect of high pressure is volume contraction and hence the shortening of interatomic and intermolecular distances. Along with structural modifications are various changes in physical properties such as electric/thermal conductivity, viscosity, melting and magnetic properties. Exploring and understanding the new physical phenomenon under high pressure will open new avenues for designing and synthesizing materials with unique properties. The development of new intense X-ray and neutron sources leads to a revolution in high-pressure science.
