Surperhard monoclinic BC6N allotropes: First-principles investigations
Qu Nian-Rui1, Wang Hong-Chao1, Li Qing1, Li Yi-Ding1, Li Zhi-Ping1, †, Gou Hui-Yang2, Gao Fa-Ming1, ‡
       

Calculated tensile stress versus tensile strain for (a) Cm-BC6N, (b) Pm-BC6N, (c) t-BC6N, and (d) r-BC6N in principal symmetry directions.