{
  "counts": {
    "above_hull": 0,
    "entries": 4,
    "intervals": 3,
    "vertices": 4
  },
  "elements": [
    "FE",
    "MN"
  ],
  "flags": [
    "no_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "FE": {
          "energy": -8133.457525376133,
          "phase": "BCC_A2"
        },
        "MN": {
          "energy": -9606.564396460575,
          "phase": "CBCC_A12"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                5.147421753265603,
                0.0019079494536704544,
                -0.0018223627117714969
              ]
            ],
            "knots": [
              0.0,
              0.00026552062379493405
            ],
            "max_abs_error": 0.0002614694329146072
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                0.0003006489955680779,
                3.5055897235055115e-05,
                -1.751344408736468e-05
              ]
            ],
            "knots": [
              0.0,
              0.00026552062379493405
            ],
            "max_abs_error": 2.51372271165038e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              5.057783254726391,
              -0.008543965160503042,
              0.0033992700016334254
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.00026552062379493405
          ],
          "max_abs_error": 0.00048799693131940103,
          "phase": "BCC_A2",
          "x_hi": 0.00026552062379493405,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 4.884727770837824,
            "slope": 989.676679023722
          },
          "entropy": {
            "intercept": 0.018585557480131708,
            "slope": 7.9748366498055825
          },
          "intercept": -0.6565561918688199,
          "kind": "two_phase",
          "left": {
            "phase": "BCC_A2",
            "x": 0.00026552062379493405
          },
          "mu_a_rel": -0.6565561918688199,
          "mu_b_rel": -1388.6774243076784,
          "right": {
            "phase": "CBCC_A12",
            "x": 0.7766962162185028
          },
          "slope": -1388.0208681158097,
          "x_hi": 0.7766962162185028,
          "x_lo": 0.00026552062379493405
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                773.5628596482564,
                -1579.8367439105002,
                806.3254974309017,
                -0.05161316865780208
              ]
            ],
            "knots": [
              0.7766962162185028,
              1.0
            ],
            "max_abs_error": 0.0005763464552899222
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                1.79715112102246,
                -1.944874471001223,
                0.14787665997223232,
                -0.0001533099934694082
              ]
            ],
            "knots": [
              0.7766962162185028,
              1.0
            ],
            "max_abs_error": 2.6754040773901977e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              237.74225291540665,
              -999.9724203806228,
              762.2360712585195,
              -0.00590379330333235
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.7766962162185028,
            1.0
          ],
          "max_abs_error": 0.00023841163496740592,
          "phase": "CBCC_A12",
          "x_hi": 1.0,
          "x_lo": 0.7766962162185028
        }
      ],
      "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": "BCC_A2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -1.0251043586113155,
          "energy_per_atom": -1.0251043586113155,
          "enthalpy": 5.147507340007501,
          "entries_at_x": 1,
          "entropy": 0.020703041082050788,
          "formula": "",
          "nsites": null,
          "phase": "BCC_A2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.00026552062379493405
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -1078.7271124897397,
          "energy_per_atom": -1078.7271124897397,
          "enthalpy": 773.5628596482564,
          "entries_at_x": 1,
          "entropy": 6.212611008344769,
          "formula": "",
          "nsites": null,
          "phase": "CBCC_A12",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.7766962162185028
        },
        {
          "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": "CBCC_A12",
          "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": "FeMn-89Lee",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:35:20Z",
    "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/FeMn-89Lee.tdb",
    "source_sha256": "8d5883ffc9634f3577d0b3ded68da5f3f96c501faa7893d2fbba9bbe29c1d1bd"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "FE-MN",
  "x_element": "MN"
}
