2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)
Sep 15 - Sep 19, 2021Online
2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)
Sep 15 - Sep 19, 2021Online
[R3-09]Compressibility and blue-shifting OH groups of Mg(OH)F under high pressure
*Xuejing He1, Hiroyuki Kagi1, Kazuki Komatsu1, Satoshi Nakano2(1. UTokyo, 2. NIMS)
Keywords:
magnesium hydroxyfluoride,high pressure,diamond anvil cell,X-ray diffraction,infrared spectroscopy
In-situ high-pressure synchrotron XRD and FTIR experiments have been conducted up to ~20 GPa at room temperature using DACs, to investigate compressibility and spectroscopic properties of Mg(OH)F (Pnma, Z = 4). The P-V correlation is fitted by the 2nd-order Birch-Murnaghan Equation of State, yielding K0 = 80(2) GPa, K0' = 4.0 (fixed), and V0 = 145.2(3) cubic anstrom. Positive pressure dependence of the O-H stretching mode frequencies indicates that the O-H...F hydrogen-bond does not strengthen under compression.