Anomalous behavior and phase transformation of α-GaOOH nanocrystals under static compression*

Project supported by the National Natural Science Foundation of China (Grant Nos. 50772043, 51172087, and 11074089) and the National Basic Research Program of China (Grant No. 2011CB808200)

Zhang Zhao1, Cui Hang1, Yang Da-Peng2, †, Zhang Jian1, ‡, Tang Shun-Xi1, Wu Si1, Cui Qi-Liang1
       

(color online) (a) Pressure-dependent normalized unit-cell parameters up to 31.0 GPa. (b) Plot of the normalized pressure F against the Eulerian strain f, with a kink at 14.6 GPa and a sudden change at 25.8 GPa. The solid lines show the linear fittings of the data. (c) Pressure-dependent unit-cell volume, fitted by using second order Birch–Murnaghan equations of state. The data below 14.6 GPa, between 16.1 GPa and 23.8 GPa, and above 25.8 GPa, are fitted separately.