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

[R3P-04] Al-Si substitution in Phase Egg and Al-rich new high-pressure hydrous phases<font color="#FF7F27">「発表賞エントリー」</font>

*Goru Takaichi¹, Masayuki Nishi¹, Youmo Zhou¹, Shinichi Machida², Tetsuo Irifune ¹ (1. Ehime Uni GRC, 2. CROSS)

Keywords:

High pressure,Hydrous mineral,Phase Egg

We report several hydrous aluminosilicates with different Al/Si ratios, which were synthesized at around 20 GPa by a multianvil apparatus. Because of the Si-Al substitution, phase egg grains with Al/Si ratios from 1.0 to 1.7 were recovered. In addition, we recovered new hydrous almuinosilicates with Al/Si values more than 2, which could not be indexed by known hydrosilicates.