The position of the critical point determines top liquid-vapor coexistence dome, and it is a physical parameter fundamental importance in study high-energy shocks, including those associated with large planetary impacts. For most major materials, such as oxides silicates, estimated below $1\phantom{\rule{4pt}{0ex}}\mathrm{g}/{\mathrm{cm}}^{3}$ at temperatures above 5000 K. Here we compute one u...