The paper presents an analysis of mechanical, structural, thermophysical and spectral properties of solid methane in temperature interval 0.5Ttr−Ttr (Ttr is the triple point temperature) under equilibrium vapor pressure. It is shown that the anomalies of the studied properties at temperatures 60--70~K have been observed in the body of the reviewed papers. A concept of "topons" (collective excitations of rotational degrees of freedom in solid methane) is proposed. A whole of the observed anomalies can be explained in the frames of this concept. Key words: solid methane, quantum crystals, rotational degrees of freedom, thermophysical and mechanical properties of the crystals
@article{arxiv.1404.5145,
title = {Abnormal behavior of crystalline methane in temperature interval $60-70~K$. From experiment to theory},
author = {A. V. Leont'eva and A. Yu. Prokhorov and A. Yu. Zakharov and A. I. Erenburg},
journal= {arXiv preprint arXiv:1404.5145},
year = {2014}
}