#Elastic constants of PbTe (GPa) from Cochran, et al Proc. Roy. Soc. 1966
107.2 7.68 7.68 0 0 0
7.68 107.2 7.68 0 0 0
7.68 7.68 107.2 0 0 0
0 0 0 13.0 0 0
0 0 0 0 13.0 0
0 0 0 0 0 13.0
