Possible Sites for Hydrogen in a New Hydrous Magnesium Silicate Phase G Synthesized at 22GPa and 1050.DEG.C.

Y. Kudoh, T. Nagase, H. Mizobata, E. Ohtani, S. Sasaki, M. Tanaka
1998 The Review of High Pressure Science and Technology  
A single crystal ofphase G, Mg1.24Si1.76H2.4806was analizedwith synchrotron radiation. The structure ofphase G has close structural similarity to that ofstishovite,SiO2. The valence sum ofthe 0 site is 1.52, indicating the existenceofhydrogen bonding as anion chemistry fir oxygen being OH1/2. The possible sites fr hydrogen are along the O-O edge of vacant tetrahedrabetween corners of Mg06 octahedrawhich are separatedby a distance of 2.654(6) A. [dense hydrous silicate, phase G, hydrogen sites, valence sum]
doi:10.4131/jshpreview.7.134 fatcat:u5lq4ogeorgvll5tgwc5sfg5oe