Stability, elastic anisotropy, and electronic properties of Ca2C3
Zhang Quan1, Wei Qun2, †, Yan Hai-Yan3, Zhu Xuan-Min2, Zhang Jun-Qin1, Jia Xiao-Fei4, Yao Rong-Hui2
       

(color online) 1×2×2 supercell of C2/m-Ca2C3. The black and blue spheres represent C and Ca atoms, respectively.