高圧下における含水 Mg 珪酸塩融体の構造変化とその水の役割

抄録

In situ high-pressure X-ray diffraction studies on the structure of hydrous Mg-silicate melts have been performed at superliquidus temperatures up to 7 GPa using a newly developed encapsulation method. The results of in situ experiments on hydrous silicate melts demonstrate the characteristic structural changes in the silicate network and local structures with pressure. This paper discusses the effect of water on the silicate network and the short-range order of a hydrous silicate melt at high pressures, based on the recent structural studies and previous works on silicate glasses.