High pressure phase stability, mechanical and optical properties of Ti4SiC3 compound: ab initio study Zhao-Yong Jiao, Shu-Hong Ma and Tian-Xing Wang Eur. Phys. J. B, 87 10 (2014) 231 Published online: 15 October 2014 DOI: 10.1140/epjb/e2014-50358-y