(color online) 2D representations of shear modulus at 0 GPa (a) and at 24 GPa (b); and 2D representations of Poisson’s ratio at 0 GPa (c) and at 24 GPa (d). The solid and dashed lines represent the maximal and minimal positive values, respectively. The black, red, and blue lines represent the projections in xy, xz, and yz planes, respectively.