Physical Properties of Group 14 in $P6_{2}$22 Phase: First-Principles Calculations *

Ying-Bo Zhao,Wei Zhang,Qing-Yang Fan

Table 1 The density ($\rho$ in g/cm$^{3}$) and lattice parameters (in $\mathring{A}$) of C$_{3}$, Si$_{3}$, and Ge$_{3}$$^{ }$ in P6$_{2}$22 phase.