Low- and high-temperature anomalies in the physical properties of solid methane

2017/08/27 by A. V. Leont’eva, Leont'eva, A. V., A. Yu. Zakharov +3
Environmental Science · Engineering · #Methane Hydrates and Related Phenomena #Hydrocarbon exploration and reservoir analysis #Phase Equilibria and Thermodynamics

paper · pdf · doi:10.48550/arxiv.1708.08077

Abstract

Near 20.48K and in the temperature range 60--70K, anomalous behavior of thermodynamic, spectral, plastic, elastic and other properties of solid methane is observed. The anomalies in the vicinity of 20.48K are due to the phase α-β transition. Anomalies in a relatively wide range of 60--70K are shown to be related to the essentially quantum nature of the collective rotation of methane molecules. The provided analysis of the high-temperature anomalies encompasses a more extensive set of phenomena in comparison with the low-temperature ones. Key words: solid methane, anomalies of physical properties, phase transition, rotational temperature, quantum-classical transition.

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