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Physical Review B
The structural stability of MgH 2 has been studied up to 16 GPa using a high-pressure synchrotron x-ray diffraction technique. Several pressure-induced phase transitions have been identified in this pressure range. Owing to the close structural similarity between the ␣ and ␥ modifications the high-pressure ␥ form can be stabilized as a metastable phase after pressure release. The experimentally observed structural transition sequence and the volume changes at the transition points as well asdoi:10.1103/physrevb.73.224102 fatcat:nd5vtm2hzfdfnjcyjkmez5krtq