{
  "counts": {
    "above_hull": 0,
    "entries": 5,
    "intervals": 4,
    "vertices": 5
  },
  "elements": [
    "C",
    "HF"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "C": {
          "energy": -1712.0723926858861,
          "phase": "GRAPHITE_A9"
        },
        "HF": {
          "energy": -12987.414426618821,
          "phase": "HCP_A3"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -209903.63231810465
          },
          "entropy": {
            "intercept": 0.0,
            "slope": -9.981455763004911
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "GRAPHITE_A9",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -206927.66128236474,
          "right": {
            "phase": "FCC_A1",
            "x": 0.5069242476738097
          },
          "slope": -206927.66128236474,
          "x_hi": 0.5069242476738097,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -106405.24089685518,
                -3079.8897583097287,
                797.2851447224914,
                -40.667260455398946
              ],
              [
                -108728.51277089781,
                -1607.3613449913428,
                668.0173795274982,
                -34.43437151720849
              ],
              [
                -109702.29110787887,
                -374.6621615919465,
                558.5467092627234,
                -29.229221331145936
              ],
              [
                -109547.63578153924,
                654.7165394306606,
                465.6128456091585,
                -24.86586722445395
              ],
              [
                -108452.17226372389,
                1511.3217120446761,
                386.5434340034476,
                -21.19608604031191
              ],
              [
                -106575.50320371606,
                2220.8011076748253,
                319.1372725666524,
                -18.099350470708487
              ],
              [
                -104053.66417394523,
                2804.7614241023684,
                261.57430229847614,
                -15.478016282978388
              ],
              [
                -101002.80646382742,
                3281.4652909614697,
                212.34550845764943,
                -13.25361351807851
              ]
            ],
            "knots": [
              0.5069242476738097,
              0.5209360392983722,
              0.5349478423330818,
              0.5489596453677913,
              0.5629714484025008,
              0.5769832514372103,
              0.5909950544719198,
              0.6050068575066294,
              0.6190186748424434
            ],
            "max_abs_error": 0.17334527276398148
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -10.822190972265464,
                -0.6101190440617513,
                0.016132171805284812,
                0.03205974605931827
              ],
              [
                -11.384118098462611,
                -0.4815473646539056,
                0.10054003989936705,
                0.0006936264867122843
              ],
              [
                -11.764431796730438,
                -0.27836514977373794,
                0.10100350138819687,
                -0.0033263000068346066
              ],
              [
                -11.94511974512282,
                -0.08633325354144482,
                0.08999116538982903,
                -0.004039650774590051
              ],
              [
                -11.94550148404902,
                0.08152934390113979,
                0.0769881107804189,
                -0.003942603980863213
              ],
              [
                -11.790926633348327,
                0.22367560556740862,
                0.06438060256409056,
                -0.0036075559901767584
              ],
              [
                -11.50647798120701,
                0.34161166681966104,
                0.05287245680229785,
                -0.003213233118593284
              ],
              [
                -11.115207090703638,
                0.43771487542371185,
                0.04263369601161704,
                -0.0028238934828305196
              ]
            ],
            "knots": [
              0.5069242476738097,
              0.5209360392983722,
              0.5349478423330818,
              0.5489596453677913,
              0.5629714484025008,
              0.5769832514372103,
              0.5909950544719198,
              0.6050068575066294,
              0.6190186748424434
            ],
            "max_abs_error": 0.0011570797834945523
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -103178.60465847423,
              -2897.9827653226344,
              792.4753376984629,
              -50.22587374276577
            ],
            [
              -105334.33795984118,
              -1463.7879982197544,
              638.041366631277,
              -34.64117625401826
            ],
            [
              -106194.72576768369,
              -291.667592186959,
              528.432515323644,
              -28.237484983854188
            ],
            [
              -105986.19832953086,
              680.4567989741307,
              438.78197964771607,
              -23.661445345660468
            ],
            [
              -104890.62099625466,
              1487.0137381603408,
              363.5894287746896,
              -20.020598663625606
            ],
            [
              -103060.03842798327,
              2154.112225875193,
              299.94219591187766,
              -17.023757652219956
            ],
            [
              -100623.00776384836,
              2702.9099056403074,
              245.81037930252842,
              -14.519990828636764
            ],
            [
              -97688.80746973414,
              3150.960600853931,
              199.63427199158014,
              -12.411669675925623
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.5069242476738097,
            0.5209360392983722,
            0.5349478423330818,
            0.5489596453677913,
            0.5629714484025008,
            0.5769832514372103,
            0.5909950544719198,
            0.6050068575066294,
            0.6190186748424434
          ],
          "max_abs_error": 0.4554332196566975,
          "phase": "FCC_A1",
          "x_hi": 0.6190186748424434,
          "x_lo": 0.5069242476738097
        },
        {
          "enthalpy": {
            "intercept": -256097.37998008117,
            "slope": 256171.80409382057
          },
          "entropy": {
            "intercept": -13.997899384619705,
            "slope": 14.354220672566823
          },
          "intercept": -251923.90627855685,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.6190186748424434
          },
          "mu_a_rel": -251923.90627855685,
          "mu_b_rel": -31.813078262057388,
          "right": {
            "phase": "HCP_A3",
            "x": 0.9945866891749925
          },
          "slope": 251892.0932002948,
          "x_hi": 0.9945866891749925,
          "x_lo": 0.6190186748424434
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -1312.3134864233978,
                1294.41694871144,
                17.454062959930752,
                0.4424747520267829
              ]
            ],
            "knots": [
              0.9945866891749925,
              1.0
            ],
            "max_abs_error": 0.0033525641085248026
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -0.001165316923699089,
                0.002711348195558158,
                -0.0015677190659441462,
                2.1687794085077205e-05
              ]
            ],
            "knots": [
              0.9945866891749925,
              1.0
            ],
            "max_abs_error": 1.836571646435016e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -1311.9660471825957,
              1293.6085602469625,
              17.921478399435955,
              0.43600853619750524
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.9945866891749925,
            1.0
          ],
          "max_abs_error": 0.003900137953223748,
          "phase": "HCP_A3",
          "x_hi": 1.0,
          "x_lo": 0.9945866891749925
        }
      ],
      "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": "GRAPHITE_A9",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -104896.64901846368,
          "energy_per_atom": -104896.64901846368,
          "enthalpy": -106405.24089685518,
          "entries_at_x": 1,
          "entropy": -5.059841953350677,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5069242476738097
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -95997.9965424211,
          "energy_per_atom": -95997.9965424211,
          "enthalpy": -97522.24927792636,
          "entries_at_x": 1,
          "entropy": -5.1123687254913825,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6190186748424434
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -1395.3832731170041,
          "energy_per_atom": -1395.3832731170041,
          "enthalpy": -1312.3134864233978,
          "entries_at_x": 1,
          "entropy": 0.27861742979576576,
          "formula": "",
          "nsites": null,
          "phase": "HCP_A3",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.9945866891749925
        },
        {
          "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",
          "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": "HfC-97Bit-LB",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:42:11Z",
    "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/HfC-97Bit-LB.tdb",
    "source_sha256": "920403c39afc1e2c018f8251f58003120f042c76ec81e9942a2ed5c64ba0dfaf"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "C-HF",
  "x_element": "HF"
}