Ab initio calculations of mechanical properties in β-MH2−xHex (M = Er, Sc) Kaimin Fan, Li Yang, Zhiyuan Zhang, Shuming Peng, Xinggui Long, Xiaosong Zhou, Xiaotao Zu and Fei Gao Eur. Phys. J. B, 87 12 (2014) 295 Published online: 08 December 2014 DOI: 10.1140/epjb/e2014-50570-9