type: thermalexpansion

references:
  - Z. Li and R.C. Bradt,
    Journal of Materials Science 21:4366-4368, 1986,
    https://doi.org/10.1007/BF01106557

Alpha_11: 3.19e-6
Alpha_11,T: 3.60e-9
Alpha_11,T^2: -1.68e-12

T_ref: 273.15