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The thermodynamic stability of three near-degenerate phases of platinum dioxide
Conference proceeding

The thermodynamic stability of three near-degenerate phases of platinum dioxide

S P Zhuo and K Sohlberg
Solid-State Chemistry of Inorganic Materials V, v 848, pp 363-368
01 Jan 2005

Abstract

Chemistry Chemistry, Physical Materials Science Materials Science, Ceramics Physical Sciences Science & Technology Technology
The thermodynamic stability of the three nearly energy degenerate crystal structures of PtO2 is studied here with first-principles-based calculations of their free energies. For P = 0 the alpha-(CdI2) structure is the thermodynamically stable phase at low temperature, while the beta-(CaCl2) structure is stable at high pressure. The beta'-(rutile) structure represents an unstable fixed point on the potential energy surface, or is possibly just barely bound. These results reconcile seemingly contradictory findings and answer longstanding questions about PtO2.

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Web of Science research areas
Chemistry, Physical
Materials Science, Ceramics
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