type: Hooke

references:
  - E.S. Fisher and C.J. Renken,
    Physical Review 135(2A):A482-A494, 1964,
    https://doi.org/10.1103/PhysRev.135.A482,
    fit to Tab. IV (T_min=150K, T_max=250K)
  - H. Ogi et al.,
    Acta Materialia 52(7):2075-2080, 2004,
    https://doi.org/10.1016/j.actamat.2004.01.002,
    fit to Fig. 3 (T_min=300K, T_max=900K)

C_11: 162.6e+9
C_11,T: -6.150e+7
C_11,T^2: -5.557e+2

C_33: 183.3e+9
C_33,T: -1.655e+07
C_33,T^2: -1.022e+04

C_44: 45.80e+9
C_44,T: -2.936e+07
C_44,T^2: 7.120e+02

C_12: 89.97e+9
C_12,T: 2.776e+6
C_12,T^2: -2.389e+4

C_13: 69.53e+9
C_13,T: 1.057e+7
C_13,T^2: -2.966e+3

T_ref: 293.15