Bond angels (degree) Further, the mechanical anisotropy is tested by calculating Li's elastic anisotropy measurement methods . In particular, we investigate the universal A , Ranganathan A ℎ , and Kube A anisotropy indices which is sufficient enough to measure mechanical anisotropy. For this, the Voigt and Reuss estimated area (K and K ) and shear moduli (G and G ) are calculated using the following formula : 4 ,