R3: High-pressure science and deep Earth's material

[R3P-08] Effect of CO₂ on the viscosity of soda melilite melt under high pressures and high temperatures

*Akio Suzuki¹ (1. Tohoku Uni.)

Keywords:soda melilite, viscosity, carbon dioxide, high pressure, quantum beam

The viscosity of carbon-dioxide bearing NaCaAlSi₂O₇ composition melts have been determined up to 5 GPa to determine the effect of dissolving carbon dioxide on the viscosity of silicate melts at high pressure. Experiments under high pressures and high temperatures has been conducted using the MAX-III apparatus in KEK, Japan. We show that dissolved carbon dioxide decreases the viscosity of soda melilite melt, however, the effect on the viscosity of soda melilite melt is much smaller than that of jadeite melt, which reported previously (Suzuki, 2018).