type: Hooke
references:
  - D.J. Dever,
    Journal of Applied Physics 43(8):3293-3301, 1972,
    https://doi.org/10.1063/1.1661710

T_ref: 300

C_11: 231.7e+9
C_11,T: -47.6e+6
C_11,T^2: -54.4e+3

C_12: 135.8e+9
C_12,T: -12.9e+6
C_12,T^2: -7.3e+3

C_44: 116.8e+9
C_44,T: -19.4e+6
C_44,T^2: -2.5e+3