{
  "counts": {
    "above_hull": 0,
    "entries": 4,
    "intervals": 3,
    "vertices": 4
  },
  "elements": [
    "B",
    "FE"
  ],
  "flags": [
    "has_intermediate_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "B": {
          "energy": -1759.0851809175983,
          "phase": "BETA_RHOMBO_B"
        },
        "FE": {
          "energy": -8133.457552123051,
          "phase": "BCC_A2"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -72077.91666242627
          },
          "entropy": {
            "intercept": 0.0,
            "slope": -19.24900145034222
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "BETA_RHOMBO_B",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -66338.82688000672,
          "right": {
            "phase": "MB_B33",
            "x": 0.499999999999505
          },
          "slope": -66338.82688000672,
          "x_hi": 0.499999999999505,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": -71103.05657417428,
            "slope": 70128.19648606307
          },
          "entropy": {
            "intercept": -25.835006062522556,
            "slope": 32.421010674754044
          },
          "intercept": -63400.34951663314,
          "kind": "two_phase",
          "left": {
            "phase": "MB_B33",
            "x": 0.499999999999505
          },
          "mu_a_rel": -63400.34951663314,
          "mu_b_rel": -2938.47736324805,
          "right": {
            "phase": "M2B_C16",
            "x": 0.6666666666666666
          },
          "slope": 60461.87215338509,
          "x_hi": 0.6666666666666666,
          "x_lo": 0.499999999999505
        },
        {
          "enthalpy": {
            "intercept": -73052.77675039669,
            "slope": 73052.77675039669
          },
          "entropy": {
            "intercept": -12.662996838059582,
            "slope": 12.662996838059582
          },
          "intercept": -69277.30424312923,
          "kind": "two_phase",
          "left": {
            "phase": "M2B_C16",
            "x": 0.6666666666666666
          },
          "mu_a_rel": -69277.30424312923,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "BCC_A2",
            "x": 1.0
          },
          "slope": 69277.30424312923,
          "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": -33169.41343997052,
          "energy_per_atom": -33169.41343997052,
          "enthalpy": -36038.958331177455,
          "entries_at_x": 1,
          "entropy": -9.624500725161582,
          "formula": "",
          "nsites": null,
          "phase": "MB_B33",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.499999999999505
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -23092.434747709747,
          "energy_per_atom": -23092.434747709747,
          "enthalpy": -24350.925583465567,
          "entries_at_x": 1,
          "entropy": -4.220998946019861,
          "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-19Wit",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:34:47Z",
    "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-19Wit.tdb",
    "source_sha256": "a20e39e4c8231b9ef69fed71aa7c23195d88d62d6db3aacc248fcd404445df70"
  },
  "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"
}
