Molecular dynamics simulation and electrical conductivity measurement of Na2O•3SiO2 melt under high pressure; relationship between its structure and properties

► We investigated the structure and properties of Na2O・3SiO2 melt under high pressure. ► We measured the electrical conductivity of Na2O
- 3SiO2 up to 3 GPa. ► Decreasing of viscosity under high pressure is due to structural distortion.