{
  "counts": {
    "above_hull": 0,
    "entries": 7,
    "intervals": 6,
    "vertices": 7
  },
  "elements": [
    "NI",
    "TI"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "NI": {
          "energy": -8883.51894771594,
          "phase": "FCC_A1"
        },
        "TI": {
          "energy": -9159.16817686215,
          "phase": "HCP_A3"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -2941.6910922243874,
                71.13716929905695,
                0.29882798609060046
              ]
            ],
            "knots": [
              0.0,
              0.018518248102629028
            ],
            "max_abs_error": 0.0026948060340146185
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                -0.37455728342601996,
                -0.005504068509804283,
                0.0004695712712994293
              ]
            ],
            "knots": [
              0.0,
              0.018518248102629028
            ],
            "max_abs_error": 1.6955165970389263e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -2830.016838171084,
              72.77820732537884,
              0.15882531159604696
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.018518248102629028
          ],
          "max_abs_error": 0.003183098329600398,
          "phase": "FCC_A1",
          "x_hi": 0.018518248102629028,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 165.73137649479577,
            "slope": -163945.66346710833
          },
          "entropy": {
            "intercept": 0.95644341984576,
            "slope": -30.74357587742271
          },
          "intercept": -119.43222913221598,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.018518248102629028
          },
          "mu_a_rel": -119.43222913221598,
          "mu_b_rel": -154898.89854838696,
          "right": {
            "phase": "NI3TI_D024",
            "x": 0.2499997674125421
          },
          "slope": -154779.46631925475,
          "x_hi": 0.2499997674125421,
          "x_lo": 0.018518248102629028
        },
        {
          "enthalpy": {
            "intercept": -46697.40183264562,
            "slope": 23507.043766047962
          },
          "entropy": {
            "intercept": -8.166480819994657,
            "slope": 5.748155032014668
          },
          "intercept": -44262.56557616421,
          "kind": "two_phase",
          "left": {
            "phase": "NI3TI_D024",
            "x": 0.2499997674125421
          },
          "mu_a_rel": -44262.56557616421,
          "mu_b_rel": -22469.33423291145,
          "right": {
            "phase": "B2_BCC",
            "x": 0.5000045656952826
          },
          "slope": 21793.231343252763,
          "x_hi": 0.5000045656952826,
          "x_lo": 0.2499997674125421
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -34943.77262362281,
                8.244760231979285,
                2.159181286024838,
                -1.0614807741773316
              ]
            ],
            "knots": [
              0.5000045656952826,
              0.5001490907419572
            ],
            "max_abs_error": 0.14591055623895954
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -11.055523380960349,
                0.01701836210420427,
                -0.00264026437492384,
                0.0002981020578320063
              ]
            ],
            "knots": [
              0.5000045656952826,
              0.5001490907419572
            ],
            "max_abs_error": 0.00018671292273353401
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -31647.568327589488,
              3.1707355701746853,
              2.946376109954987,
              -1.150359902800962
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.5000045656952826,
            0.5001490907419572
          ],
          "max_abs_error": 0.09687836267403327,
          "phase": "B2_BCC",
          "x_hi": 0.5001490907419572,
          "x_lo": 0.5000045656952826
        },
        {
          "enthalpy": {
            "intercept": -55540.433802517386,
            "slope": 41199.72228494904
          },
          "entropy": {
            "intercept": -9.245291249362547,
            "slope": 7.932814621973832
          },
          "intercept": -52783.95021651993,
          "kind": "two_phase",
          "left": {
            "phase": "B2_BCC",
            "x": 0.5001490907419572
          },
          "mu_a_rel": -52783.95021651993,
          "mu_b_rel": -13949.396611112403,
          "right": {
            "phase": "NITI2",
            "x": 0.6666666666666666
          },
          "slope": 38834.55360540753,
          "x_hi": 0.6666666666666666,
          "x_lo": 0.5001490907419572
        },
        {
          "enthalpy": {
            "intercept": -84221.85683765406,
            "slope": 84221.85683765406
          },
          "entropy": {
            "intercept": -11.870244504139974,
            "slope": 11.870244504139974
          },
          "intercept": -80682.74343874473,
          "kind": "two_phase",
          "left": {
            "phase": "NITI2",
            "x": 0.6666666666666666
          },
          "mu_a_rel": -80682.74343874473,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "HCP_A3",
            "x": 1.0
          },
          "slope": 80682.74343874473,
          "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": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -2985.6767876246886,
          "energy_per_atom": -2985.6767876246886,
          "enthalpy": -2870.2550949392403,
          "entries_at_x": 1,
          "entropy": 0.3871262541856453,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.018518248102629028
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -38814.262809183296,
          "energy_per_atom": -38814.262809183296,
          "enthalpy": -40820.646358577185,
          "entries_at_x": 1,
          "entropy": -6.7294433989397575,
          "formula": "",
          "nsites": null,
          "phase": "NI3TI_D024",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.2499997674125421
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -33365.85040328429,
          "energy_per_atom": -33365.85040328429,
          "enthalpy": -34943.77262362281,
          "entries_at_x": 1,
          "entropy": -5.292377059663011,
          "formula": "",
          "nsites": null,
          "phase": "B2_BCC",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5000045656952826
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -33360.88354140556,
          "energy_per_atom": -33360.88354140556,
          "enthalpy": -34934.43016287897,
          "entries_at_x": 1,
          "entropy": -5.277701229157831,
          "formula": "",
          "nsites": null,
          "phase": "B2_BCC",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5001490907419572
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -26894.247812914913,
          "energy_per_atom": -26894.247812914913,
          "enthalpy": -28073.952279218025,
          "entries_at_x": 1,
          "entropy": -3.9567481680466585,
          "formula": "",
          "nsites": null,
          "phase": "NITI2",
          "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": "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-92Sau",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:55:03Z",
    "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/NiTi-92Sau.tdb",
    "source_sha256": "7cdd2f2d8f3af719d9c8759a84e7e001044dba426bbe76a65d87dd97f77e9d05"
  },
  "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"
}