Electrophysical and thermodynamic properties of shock compressed incommensurate phase Sc-II

Abstract

The electric resistance of shock-compressed scandium has been studied up to pressures of $90\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$. The low-pressure phase of scandium Sc-I undergoes polymorphic transformation in the high-pressure incommensurate phase Sc-II at a shock pressure of $\ensuremath{\approx}16.5\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$ and a calculated shock temperature of $\ensuremath{\approx}510\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. The equation of state of the incommensurate phase Sc-II is constructed.