Phase Transformations and Lattice Instability of Earth Interiors under High Pressure and Stress Field

抄録

Phase transformations in earth interiors is discussed on the basis of the lattice instability under the condition of homogeneous or inhomogeneous stress field. X-ray diffractometry and molecular dynamics calculation elucidate. the atomic positional displacement and fluctuation of crystallographic translation operation resulting in the lattice deformations. The lattice instability is clarified by diffraction profile analysis. Reversible pressure-induced transformations come out from the elastic deformation. On the other hand irreversible transformation are caused by the plastic deformation.