Abstract
This article reviews the density and viscosity of magma and metallic liquid at high pressure and high temperature. Because magma and metallic liquid have played important roles in the Earth’s history, we have investigated the physical properties of such liquids at high pressures and high temperatures. Density measurement of liquid is now mainly carried out by the sink/float method and the X-ray absorption method. Falling sphere method is applied to measure the viscosity. The newly established radiography system at SPring-8 enables us to measure the viscosity in situ up to 13.1 GPa and 2470 K.
