{
  "id": "nacl_b1_historical_data_2026_refit",
  "q": 1.5035191435500774,
  "rms_gpa": {
    "BK": 0.015109978829331095,
    "ED_polynomial": 0.008666221203436625,
    "shock": 0.18666547229397218
  },
  "validation": {
    "yamamoto": "see JSON",
    "janaf": "see JSON",
    "yamamoto_max_relative_ks_difference": 0.04873083290846636,
    "janaf_max_relative_cp_difference": 0.02071775809090326,
    "cold_kt_range_gpa": [
      12.166354967931955,
      118.68213163189021
    ],
    "cold_kprime_range": [
      3.1849500825374504,
      6.416609183164287
    ],
    "initial_pressure_error_gpa": -1.810753153322353e-16,
    "independence": "Elastic moduli and Cp held out of fitting/model choice; gamma0 adopts Spetzler's ambient value. These sources share historical auxiliary data."
  }
}
