references:
  - Y.S. Touloukian et al.,
    TPRC Data Series Volume 1. Thermal conductivity - metallic elements and alloys,
    IFI/Plenum, 1970,
    fit to Tab. 35R (T_min=150K, T_max=500K)
  - https://www.engineeringtoolbox.com/specific-heat-metals-d_152.html

K_11: 9.132e+1
K_11,T: -1.525e-1
K_11,T^2: 3.053e-4

T_ref: 293.15

C_p: 440.0