{
  "counts": {
    "above_hull": 0,
    "entries": 4,
    "intervals": 3,
    "vertices": 4
  },
  "elements": [
    "CO",
    "FE"
  ],
  "flags": [
    "no_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "CO": {
          "energy": -8956.449378509065,
          "phase": "HCP_A3"
        },
        "FE": {
          "energy": -8134.352015893359,
          "phase": "BCC_A2"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -592.4885757845404,
                55.479891611731205,
                -0.5957502050069934
              ]
            ],
            "knots": [
              0.0,
              0.02732154424824168
            ],
            "max_abs_error": 0.001683574425783263
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                -0.44132521307521894,
                0.020783666715926963,
                -0.0006749996181499851
              ]
            ],
            "knots": [
              0.0,
              0.02732154424824168
            ],
            "max_abs_error": 3.784328450606722e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -460.90746350620105,
              49.28324138018371,
              -0.3944990686231904
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.02732154424824168
          ],
          "max_abs_error": 0.002806056854808503,
          "phase": "HCP_A3",
          "x_hi": 0.02732154424824168,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 122.39706784923362,
            "slope": -24156.815450485574
          },
          "entropy": {
            "intercept": 0.8034964069546844,
            "slope": -6.693345093283333
          },
          "intercept": -117.1653858843033,
          "kind": "two_phase",
          "left": {
            "phase": "HCP_A3",
            "x": 0.02732154424824168
          },
          "mu_a_rel": -117.1653858843033,
          "mu_b_rel": -22278.359996807478,
          "right": {
            "phase": "BCC_A2",
            "x": 0.1913204753060392
          },
          "slope": -22161.194610923176,
          "x_hi": 0.1913204753060392,
          "x_lo": 0.02732154424824168
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -4499.296346017938,
                -5141.205705943533,
                1828.4321238023679,
                -73.50520825906483
              ],
              [
                -7885.575136418167,
                -1704.869175015614,
                1609.9660048011297,
                -55.46349226506891
              ],
              [
                -8035.941798897719,
                1348.6710287005294,
                1442.8896339195576,
                -53.31097880261177
              ],
              [
                -5297.692115080245,
                4074.52090014928,
                1281.3803101365647,
                -58.209095205599624
              ]
            ],
            "knots": [
              0.1913204753060392,
              0.3934903523977237,
              0.5956602345984825,
              0.7978301167992412,
              1.0
            ],
            "max_abs_error": 0.49619636070019624
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -4.5356329275344365,
                -4.64147141659139,
                1.5824100517537154,
                -0.049404851732948174
              ],
              [
                -7.644099144105059,
                -1.6248859847138633,
                1.4375721072497676,
                -0.020451740385363237
              ],
              [
                -7.851864761954517,
                1.1888925949132583,
                1.376870275624075,
                -0.005768228286326504
              ],
              [
                -5.291870119703511,
                3.925318935790794,
                1.3586812013244147,
                0.007869982588303515
              ]
            ],
            "knots": [
              0.1913204753060392,
              0.3934903523977237,
              0.5956602345984825,
              0.7978301167992412,
              1.0
            ],
            "max_abs_error": 0.0006585485372623268
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -3146.997388673549,
              -3757.3510030865605,
              1356.636566871408,
              -58.77515171453888
            ],
            [
              -5606.486976603239,
              -1220.409418673391,
              1181.353881024983,
              -49.36580586933462
            ],
            [
              -5694.908320120982,
              994.202701527089,
              1032.375761242306,
              -51.59118153905911
            ],
            [
              -3719.9210388906454,
              2904.187059443431,
              876.2895099612579,
              -60.55553051404331
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.1913204753060392,
            0.3934903523977237,
            0.5956602345984825,
            0.7978301167992412,
            1.0
          ],
          "max_abs_error": 0.2998501143019894,
          "phase": "BCC_A2",
          "x_hi": 1.0,
          "x_lo": 0.1913204753060392
        }
      ],
      "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",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -722.6434450405359,
          "energy_per_atom": -722.6434450405359,
          "enthalpy": -537.6044343778162,
          "entries_at_x": 1,
          "entropy": 0.6206238828197925,
          "formula": "",
          "nsites": null,
          "phase": "HCP_A3",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.02732154424824168
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -4357.05567219576,
          "energy_per_atom": -4357.05567219576,
          "enthalpy": -4499.296346017938,
          "entries_at_x": 1,
          "entropy": -0.47707755767962823,
          "formula": "",
          "nsites": null,
          "phase": "BCC_A2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.1913204753060392
        },
        {
          "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": "BCC_A2",
          "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": "CoFe-15Rod",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:23:36Z",
    "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/CoFe-15Rod.tdb",
    "source_sha256": "b439f24ad16996c6d1c9de95859f4110298fffc3cd6c3ddbc92f172b29ca73d0"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "CO-FE",
  "x_element": "FE"
}