{
  "counts": {
    "above_hull": 0,
    "entries": 7,
    "intervals": 6,
    "vertices": 7
  },
  "elements": [
    "NI",
    "TI"
  ],
  "flags": [
    "degenerate_boundary_phase",
    "has_intermediate_phases",
    "redundant_phase_descriptions",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "NI": {
          "energy": -8883.51893361423,
          "phase": "FCC_4SL"
        },
        "TI": {
          "energy": -9159.168173543565,
          "phase": "HCP_A3"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -1403.7424176039667,
                28.10062377042641,
                0.13772104317604317
              ]
            ],
            "knots": [
              0.0,
              0.01008969457527962
            ],
            "max_abs_error": 0.0008939656177062716
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                -0.013728670798574299,
                0.008670161493683154,
                0.001119029087125677
              ]
            ],
            "knots": [
              0.0,
              0.01008969457527962
            ],
            "max_abs_error": 9.449226644021175e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -1399.6492144053384,
              25.515615120725897,
              -0.19591747882213895
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.01008969457527962
          ],
          "max_abs_error": 0.0029748389866881553,
          "phase": "A1_FCC",
          "x_hi": 0.01008969457527962,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 134.16873986000428,
            "slope": -149625.22417171684
          },
          "entropy": {
            "intercept": 0.6185858214981652,
            "slope": -15.21147526628819
          },
          "intercept": -50.26262281967024,
          "kind": "two_phase",
          "left": {
            "phase": "A1_FCC",
            "x": 0.01008969457527962
          },
          "mu_a_rel": -50.26262281967024,
          "mu_b_rel": -145140.18544389273,
          "right": {
            "phase": "NI3TI_D024",
            "x": 0.24999865540535107
          },
          "slope": -145089.92282107307,
          "x_hi": 0.24999865540535107,
          "x_lo": 0.01008969457527962
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -37271.93611779344,
                -0.25896864055539015,
                -0.00013105751718173186,
                0.00013381883040780584
              ]
            ],
            "knots": [
              0.24999865540535107,
              0.25000000000510303
            ],
            "max_abs_error": 1.9196028006263077e-05
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -7.859764798546323,
                -0.00022653836762542918,
                3.167809856742217e-05,
                -4.285593487730573e-05
              ]
            ],
            "knots": [
              0.24999865540535107,
              0.25000000000510303
            ],
            "max_abs_error": 4.786990798422153e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -34928.54724310686,
              -0.19142622504585893,
              -0.009575884026422454,
              0.012911316030373154
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.24999865540535107,
            0.25000000000510303
          ],
          "max_abs_error": 0.0014462859471677803,
          "phase": "NI3TI_D024",
          "x_hi": 0.25000000000510303,
          "x_lo": 0.24999865540535107
        },
        {
          "enthalpy": {
            "intercept": -40444.71695889743,
            "slope": 12690.087500639953
          },
          "entropy": {
            "intercept": -6.557209790333579,
            "slope": 13.490887257471865
          },
          "intercept": -38489.68485990948,
          "kind": "two_phase",
          "left": {
            "phase": "NI3TI_D024",
            "x": 0.25000000000510303
          },
          "mu_a_rel": -38489.68485990948,
          "mu_b_rel": -29821.905395084752,
          "right": {
            "phase": "BCC_4SL",
            "x": 0.499999050542997
          },
          "slope": 8667.779464824727,
          "x_hi": 0.499999050542997,
          "x_lo": 0.25000000000510303
        },
        {
          "enthalpy": {
            "intercept": -55695.05024760977,
            "slope": 43190.81199631757
          },
          "entropy": {
            "intercept": 6.086040258451929,
            "slope": -11.79566085707953
          },
          "intercept": -57509.603150667215,
          "kind": "two_phase",
          "left": {
            "phase": "BCC_4SL",
            "x": 0.499999050542997
          },
          "mu_a_rel": -57509.603150667215,
          "mu_b_rel": -10801.914869811371,
          "right": {
            "phase": "NITI2",
            "x": 0.6666666666666634
          },
          "slope": 46707.688280855844,
          "x_hi": 0.6666666666666634,
          "x_lo": 0.499999050542997
        },
        {
          "enthalpy": {
            "intercept": -80703.52675019379,
            "slope": 80703.52675019379
          },
          "entropy": {
            "intercept": -5.333200938803107,
            "slope": 5.333200938803107
          },
          "intercept": -79113.43289028965,
          "kind": "two_phase",
          "left": {
            "phase": "NITI2",
            "x": 0.6666666666666634
          },
          "mu_a_rel": -79113.43289028965,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "HCP_A3",
            "x": 1.0
          },
          "slope": 79113.43289028965,
          "x_hi": 1.0,
          "x_lo": 0.6666666666666634
        }
      ],
      "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": "A1_FCC",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [
            {
              "energy": -1514.17563003519,
              "phase": "FCC_4SL"
            }
          ],
          "energy": -1514.17563003519,
          "energy_per_atom": -1514.17563003519,
          "enthalpy": -1375.5040727903643,
          "entries_at_x": 1,
          "entropy": 0.4651066820218972,
          "formula": "",
          "nsites": null,
          "phase": "A1_FCC",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.01008969457527962
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -36322.5482409541,
          "energy_per_atom": -36322.5482409541,
          "enthalpy": -37271.93611779344,
          "entries_at_x": 1,
          "entropy": -3.184262541805637,
          "formula": "",
          "nsites": null,
          "phase": "NI3TI_D024",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.24999865540535107
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -36322.73999365907,
          "energy_per_atom": -36322.73999365907,
          "enthalpy": -37272.19508367268,
          "entries_at_x": 1,
          "entropy": -3.1844879758967686,
          "formula": "",
          "nsites": null,
          "phase": "NI3TI_D024",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.25000000000510303
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -34155.80335718103,
          "energy_per_atom": -34155.80335718103,
          "enthalpy": -34099.6852572699,
          "entries_at_x": 1,
          "entropy": 0.18822102938496954,
          "formula": "",
          "nsites": null,
          "phase": "BCC_4SL",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.499999050542997
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -26371.144296763476,
          "energy_per_atom": -26371.144296763476,
          "enthalpy": -26901.175583398195,
          "entries_at_x": 1,
          "entropy": -1.7777336462677198,
          "formula": "",
          "nsites": null,
          "phase": "NITI2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6666666666666634
        },
        {
          "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": "NiTi-14Hu",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:55:07Z",
    "phase_families": {
      "BCC_A2": "A2_BCC",
      "FCC_A1": "A1_FCC"
    },
    "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/NiTi-14Hu.tdb",
    "source_sha256": "83c0ad45fde56b371df4f38e3e86d022e6fa3c08bc62327ab5b69278071dc3e8"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "NI-TI",
  "x_element": "TI"
}