{
  "counts": {
    "above_hull": 0,
    "entries": 7,
    "intervals": 6,
    "vertices": 7
  },
  "elements": [
    "CO",
    "HF"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "CO": {
          "energy": -8956.449437159949,
          "phase": "HCP_A3"
        },
        "HF": {
          "energy": -12987.414219717251,
          "phase": "HCP_A3"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -130914.88032197773
          },
          "entropy": {
            "intercept": 0.0,
            "slope": -2.049696885247441
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "HCP_A3#1",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -130303.76319564131,
          "right": {
            "phase": "CO23HF6_D8A",
            "x": 0.20689655172413793
          },
          "slope": -130303.76319564131,
          "x_hi": 0.20689655172413793,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": -6019.257942175242,
            "slope": -101821.80026813073
          },
          "entropy": {
            "intercept": 0.7908478423000187,
            "slope": -5.872128123030865
          },
          "intercept": -6255.0492263570595,
          "kind": "two_phase",
          "left": {
            "phase": "CO23HF6_D8A",
            "x": 0.20689655172413793
          },
          "mu_a_rel": -6255.0492263570595,
          "mu_b_rel": -106326.07449460591,
          "right": {
            "phase": "C15_LAVES",
            "x": 0.28316263492727106
          },
          "slope": -100071.02526824885,
          "x_hi": 0.28316263492727106,
          "x_lo": 0.20689655172413793
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -34851.387199137454,
                -5212.186495348719,
                595.0603069574786,
                -0.0017504459751762624
              ]
            ],
            "knots": [
              0.28316263492727106,
              0.33333333333426973
            ],
            "max_abs_error": 0.0012050106161041185
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -5.826637028666478,
                -0.12873581979250648,
                0.0016494170337174319,
                -0.00014452418487129193
              ],
              [
                -5.953867955610137,
                -0.1258703878830747,
                0.0011866814916412644,
                -0.00019289495544395907
              ],
              [
                -6.078744556957013,
                -0.12407516802079747,
                0.0005702845946362611,
                -0.0002698603494823981
              ],
              [
                -6.202519300732657,
                -0.12374330667699486,
                -0.0002892997068688896,
                -0.00040418352738733065
              ],
              [
                -6.3269560906439075,
                -0.12553286240501185,
                -0.0015661522032897335,
                -0.0006713697381310613
              ],
              [
                -6.45472647499034,
                -0.13067549186709,
                -0.0036372757901949326,
                -0.0013299309948072435
              ],
              [
                -6.590369173642432,
                -0.1419270018213213,
                -0.007310730758051498,
                -0.0038385269961856427
              ],
              [
                -6.743445433217989,
                -0.10497431912010431,
                -0.007554073955300639,
                -0.004139968188028503
              ],
              [
                -6.860113794481422,
                -0.07855950777624413,
                -0.0062160739098126305,
                -0.014063077345155411
              ]
            ],
            "knots": [
              0.28316263492727106,
              0.2894339699092389,
              0.2957053082679283,
              0.30197664662661766,
              0.30824798498530703,
              0.3145193233439964,
              0.3207906617026858,
              0.32706200006137515,
              0.330981586535556,
              0.33333333333426973
            ],
            "max_abs_error": 0.00041668809849415567
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -33114.175369040546,
              -613.1404863381987,
              8.807460245809125,
              0.04148115301904909
            ],
            [
              -33718.46691397991,
              -595.3951016654266,
              8.927470523378702,
              0.0699721855540929
            ],
            [
              -34304.8645729364,
              -577.3375822500624,
              9.120861095153145,
              0.08588779275794423
            ],
            [
              -34872.99540629854,
              -558.8460931502874,
              9.391060644246636,
              0.11698824633390359
            ],
            [
              -35422.333450558224,
              -539.7134596071799,
              9.764613358401107,
              0.20025508883293242
            ],
            [
              -35952.082041718175,
              -519.5846958703432,
              10.382280045169864,
              0.3964800206349537
            ],
            [
              -36460.8879775227,
              -497.63440928936615,
              11.477276973203914,
              1.1445560440811846
            ],
            [
              -36945.900553794774,
              -294.5485080687061,
              5.884251166866704,
              1.234302423468364
            ],
            [
              -37233.33050827314,
              -167.72667771832946,
              3.1608151621651643,
              4.19290686944143
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.28316263492727106,
            0.2894339699092389,
            0.2957053082679283,
            0.30197664662661766,
            0.30824798498530703,
            0.3145193233439964,
            0.3207906617026858,
            0.32706200006137515,
            0.330981586535556,
            0.33333333333426973
          ],
          "max_abs_error": 0.12423556720750639,
          "phase": "C15_LAVES",
          "x_hi": 0.33333333333426973,
          "x_lo": 0.28316263492727106
        },
        {
          "enthalpy": {
            "intercept": -34753.47645485371,
            "slope": -14145.11604932312
          },
          "entropy": {
            "intercept": 3.681337861852703,
            "slope": -16.04405117139839
          },
          "intercept": -35851.067338365094,
          "kind": "two_phase",
          "left": {
            "phase": "C15_LAVES",
            "x": 0.33333333333426973
          },
          "mu_a_rel": -35851.067338365094,
          "mu_b_rel": -45212.649530935756,
          "right": {
            "phase": "B2_BCC",
            "x": 0.4999999999685541
          },
          "slope": -9361.582192570664,
          "x_hi": 0.4999999999685541,
          "x_lo": 0.33333333333426973
        },
        {
          "enthalpy": {
            "intercept": -76463.8965492236,
            "slope": 69275.72414466314
          },
          "entropy": {
            "intercept": -10.107581852214,
            "slope": 11.533788258469437
          },
          "intercept": -73450.32101998595,
          "kind": "two_phase",
          "left": {
            "phase": "B2_BCC",
            "x": 0.4999999999685541
          },
          "mu_a_rel": -73450.32101998595,
          "mu_b_rel": -7613.395844585524,
          "right": {
            "phase": "COHF2",
            "x": 0.6666666666679248
          },
          "slope": 65836.92517540042,
          "x_hi": 0.6666666666679248,
          "x_lo": 0.4999999999685541
        },
        {
          "enthalpy": {
            "intercept": -90840.24135842592,
            "slope": 90840.24135842592
          },
          "entropy": {
            "intercept": -7.255169039686977,
            "slope": 7.255169039686977
          },
          "intercept": -88677.11270924323,
          "kind": "two_phase",
          "left": {
            "phase": "COHF2",
            "x": 0.6666666666679248
          },
          "mu_a_rel": -88677.11270924323,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "HCP_A3#2",
            "x": 1.0
          },
          "slope": 88677.11270924323,
          "x_hi": 1.0,
          "x_lo": 0.6666666666679248
        }
      ],
      "phase_instances": {
        "HCP_A3#1": "HCP_A3",
        "HCP_A3#2": "HCP_A3"
      },
      "temperature_K": 298.15,
      "vertices": [
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": 0.0,
          "enthalpy": 0.0,
          "entries_at_x": 1,
          "entropy": 0.0,
          "formula": "",
          "nsites": null,
          "phase": "HCP_A3#1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -26959.399281856822,
          "energy_per_atom": -26959.399281856822,
          "enthalpy": -27085.837307995393,
          "entries_at_x": 1,
          "entropy": -0.42407521763740164,
          "formula": "",
          "nsites": null,
          "phase": "CO23HF6_D8A",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.20689655172413793
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -34591.42442118793,
          "energy_per_atom": -34591.42442118793,
          "enthalpy": -34851.387199137454,
          "entries_at_x": 1,
          "entropy": -0.8719194296479316,
          "formula": "",
          "nsites": null,
          "phase": "C15_LAVES",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.28316263492727106
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -38971.594735897415,
          "energy_per_atom": -38971.594735897415,
          "enthalpy": -39468.51513797467,
          "entries_at_x": 1,
          "entropy": -1.6666791952951172,
          "formula": "",
          "nsites": null,
          "phase": "C15_LAVES",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.33333333333426973
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -40531.85843435604,
          "energy_per_atom": -40531.85843435604,
          "enthalpy": -41826.03447907047,
          "entries_at_x": 1,
          "entropy": -4.340687723341972,
          "formula": "",
          "nsites": null,
          "phase": "B2_BCC",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.4999999999685541
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -29559.03756963617,
          "energy_per_atom": -29559.03756963617,
          "enthalpy": -30280.080452694347,
          "entries_at_x": 1,
          "entropy": -2.4183896798865305,
          "formula": "",
          "nsites": null,
          "phase": "COHF2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6666666666679248
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": 0.0,
          "enthalpy": 0.0,
          "entries_at_x": 1,
          "entropy": 0.0,
          "formula": "",
          "nsites": null,
          "phase": "HCP_A3#2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 1.0
        }
      ]
    }
  ],
  "mp_agreement": {
    "comparable": false,
    "comparable_note": "CALPHAD isotherms have no upstream stability flag to compare against",
    "max_abs_delta_energy_above_hull": 0.0,
    "only_mp_stable": [],
    "only_ours_stable": [],
    "stable_sets_match": true
  },
  "provenance": {
    "assessment": "CoHf-15Lu",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:24:29Z",
    "phase_families": {},
    "sample_conditions": {
      "endpoint_tol": 1.0,
      "fit_samples": 65,
      "order_tol": 0.0001,
      "pressure_Pa": 101325.0,
      "redundant_tol": 1.0,
      "refine_tol": 1e-07,
      "step": 0.002,
      "temperature_K": 298.15
    },
    "source_path": "databases/sgte-binary/CoHf-15Lu.tdb",
    "source_sha256": "dffa8495cab9319c36b1181ed0b46493b6f6a38ca666c3f259650656dafa9d5a"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "CO-HF",
  "x_element": "HF"
}