{
  "counts": {
    "above_hull": 0,
    "entries": 5,
    "intervals": 4,
    "vertices": 5
  },
  "elements": [
    "FE",
    "TI"
  ],
  "flags": [
    "has_intermediate_phases",
    "redundant_phase_descriptions",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "FE": {
          "energy": -8133.45757528128,
          "phase": "B2_BCC"
        },
        "TI": {
          "energy": -9159.168154620884,
          "phase": "HCP_A3"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -0.1998693117169008,
                -0.005887756989263859,
                0.002926745168585543
              ]
            ],
            "knots": [
              0.0,
              6.461413734640449e-06
            ],
            "max_abs_error": 0.00041975379031686244
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                -1.9197528036346235e-05,
                3.444636318336173e-05,
                -1.713283442884958e-05
              ]
            ],
            "knots": [
              0.0,
              6.461413734640449e-06
            ],
            "max_abs_error": 2.4572224983165913e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -0.1941455688017154,
              -0.016157940443418728,
              0.008034900093821795
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            6.461413734640449e-06
          ],
          "max_abs_error": 0.0011523746380770333,
          "phase": "B2_BCC#1",
          "x_hi": 6.461413734640449e-06,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 0.17176399300219786,
            "slope": -57974.04901214265
          },
          "entropy": {
            "intercept": 0.000629526972952464,
            "slope": 9.949206203113349
          },
          "intercept": -0.015929473983191056,
          "kind": "two_phase",
          "left": {
            "phase": "B2_BCC#1",
            "x": 6.461413734640449e-06
          },
          "mu_a_rel": -0.015929473983191056,
          "mu_b_rel": -60940.4207710749,
          "right": {
            "phase": "C14_LAVES",
            "x": 0.33333324960767724
          },
          "slope": -60940.40484160092,
          "x_hi": 0.33333324960767724,
          "x_lo": 6.461413734640449e-06
        },
        {
          "enthalpy": {
            "intercept": -1311.3638580182924,
            "slope": -54039.4411578259
          },
          "entropy": {
            "intercept": 21.364415526875185,
            "slope": -54.14216789487039
          },
          "intercept": -7681.164347356167,
          "kind": "two_phase",
          "left": {
            "phase": "C14_LAVES",
            "x": 0.33333324960767724
          },
          "mu_a_rel": -7681.164347356167,
          "mu_b_rel": -45578.11814732636,
          "right": {
            "phase": "B2_BCC#2",
            "x": 0.49999997681516706
          },
          "slope": -37896.95379997019,
          "x_hi": 0.49999997681516706,
          "x_lo": 0.33333324960767724
        },
        {
          "enthalpy": {
            "intercept": -56662.16374066605,
            "slope": 56662.16374066605
          },
          "entropy": {
            "intercept": -11.413333801333307,
            "slope": 11.413333801333307
          },
          "intercept": -53259.2782677985,
          "kind": "two_phase",
          "left": {
            "phase": "B2_BCC#2",
            "x": 0.49999997681516706
          },
          "mu_a_rel": -53259.2782677985,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "HCP_A3",
            "x": 1.0
          },
          "slope": 53259.2782677985,
          "x_hi": 1.0,
          "x_lo": 0.49999997681516706
        }
      ],
      "phase_instances": {
        "B2_BCC#1": "B2_BCC",
        "B2_BCC#2": "B2_BCC"
      },
      "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": "B2_BCC#1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.40969064282126055,
          "energy_per_atom": -0.40969064282126055,
          "enthalpy": -0.20283032353757918,
          "entries_at_x": 1,
          "entropy": 0.0006938129105620305,
          "formula": "",
          "nsites": null,
          "phase": "B2_BCC#1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 6.461413734640449e-06
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -20313.479107732244,
          "energy_per_atom": -20313.479107732244,
          "enthalpy": -19324.50638613926,
          "entries_at_x": 1,
          "entropy": 3.3170307616735855,
          "formula": "",
          "nsites": null,
          "phase": "C14_LAVES",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.33333324960767724
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -26629.64036870672,
          "energy_per_atom": -26629.64036870672,
          "enthalpy": -28331.083184035826,
          "entries_at_x": 1,
          "entropy": -5.706667165282891,
          "formula": "",
          "nsites": null,
          "phase": "B2_BCC#2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.49999997681516706
        },
        {
          "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": "FeTi-21San",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:37:37Z",
    "phase_families": {
      "BCC_A2": "A2_BCC"
    },
    "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/FeTi-21San.tdb",
    "source_sha256": "34a1c0676e8eed2a1bffe5586aa61e5ee7d8057553d49b6486bbd670d2113056"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "FE-TI",
  "x_element": "TI"
}
