{
  "counts": {
    "above_hull": 0,
    "entries": 4,
    "intervals": 3,
    "vertices": 4
  },
  "elements": [
    "B",
    "FE"
  ],
  "flags": [
    "has_intermediate_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "B": {
          "energy": -1759.0851752715337,
          "phase": "BETA_RHOMBO_B"
        },
        "FE": {
          "energy": -8133.457545899408,
          "phase": "BCC_A2"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -61424.53168099705
          },
          "entropy": {
            "intercept": 0.0,
            "slope": -2.400188443909027
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "BETA_RHOMBO_B",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -60708.91549644559,
          "right": {
            "phase": "MB_B27",
            "x": 0.5
          },
          "slope": -60708.91549644559,
          "x_hi": 0.5,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": -62364.99993843325,
            "slope": 63305.46819586944
          },
          "entropy": {
            "intercept": -13.57000001902346,
            "slope": 24.739811594137894
          },
          "intercept": -58319.10443276142,
          "kind": "two_phase",
          "left": {
            "phase": "MB_B27",
            "x": 0.5
          },
          "mu_a_rel": -58319.10443276142,
          "mu_b_rel": -2389.8110636841593,
          "right": {
            "phase": "M2B_C16",
            "x": 0.6666666666666666
          },
          "slope": 55929.29336907726,
          "x_hi": 0.6666666666666666,
          "x_lo": 0.5
        },
        {
          "enthalpy": {
            "intercept": -60484.06342356086,
            "slope": 60484.06342356086
          },
          "entropy": {
            "intercept": 8.769623131205401,
            "slope": -8.769623131205401
          },
          "intercept": -63098.726560129755,
          "kind": "two_phase",
          "left": {
            "phase": "M2B_C16",
            "x": 0.6666666666666666
          },
          "mu_a_rel": -63098.726560129755,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "BCC_A2",
            "x": 1.0
          },
          "slope": 63098.726560129755,
          "x_hi": 1.0,
          "x_lo": 0.6666666666666666
        }
      ],
      "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": "BETA_RHOMBO_B",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -30354.457748222794,
          "energy_per_atom": -30354.457748222794,
          "enthalpy": -30712.265840498527,
          "entries_at_x": 1,
          "entropy": -1.2000942219545134,
          "formula": "",
          "nsites": null,
          "phase": "MB_B27",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -21032.908853376586,
          "energy_per_atom": -21032.908853376586,
          "enthalpy": -20161.35447452029,
          "entries_at_x": 1,
          "entropy": 2.923207710401801,
          "formula": "",
          "nsites": null,
          "phase": "M2B_C16",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6666666666666666
        },
        {
          "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": "FeB-94Hal-LB",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:34:49Z",
    "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/FeB-94Hal-LB.tdb",
    "source_sha256": "724a628400ef810cb479abfadf4cb9931f7b146840942f0561e61a99cf63763b"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "B-FE",
  "x_element": "FE"
}
