#Elastic constants of Pb (GPa) from Anderson, Physical Acoustics 1965 (measured at 293 K)
46.6 39.2 39.2 0 0 0
39.2 46.6 39.2 0 0 0
39.2 39.2 46.6 0 0 0
0 0 0 14.4 0 0
0 0 0 0 14.4 0
0 0 0 0 0 14.4
