Pressure-Induced Structural Transitions inMgH2

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چکیده

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Pressure-induced structural transitions in MgH2.

The stability of MgH2 has been studied up to 20 GPa using density-functional total-energy calculations. At ambient pressure alpha-MgH2 takes a TiO2-rutile-type structure. alpha-MgH2 is predicted to transform into gamma-MgH2 at 0.39 GPa. The calculated structural data for alpha- and gamma-MgH2 are in very good agreement with experimental values. At equilibrium the energy difference between these...

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ژورنال

عنوان ژورنال: Physical Review Letters

سال: 2002

ISSN: 0031-9007,1079-7114

DOI: 10.1103/physrevlett.89.175506