{
  "counts": {
    "above_hull": 0,
    "entries": 4,
    "intervals": 3,
    "vertices": 4
  },
  "elements": [
    "NB",
    "TI"
  ],
  "flags": [
    "no_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "NB": {
          "energy": -10813.90038933742,
          "phase": "BCC_A2"
        },
        "TI": {
          "energy": -9159.168131048129,
          "phase": "HCP_A3"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                4.711328365877726,
                0.0032259751457637265,
                -0.0021589849563099506
              ]
            ],
            "knots": [
              0.0,
              0.00020515208913777892
            ],
            "max_abs_error": 0.0003097483925058597
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                0.0012998089524505752,
                3.4225574441757107e-05,
                -1.702587906401553e-05
              ]
            ],
            "knots": [
              0.0,
              0.00020515208913777892
            ],
            "max_abs_error": 2.4434479383421566e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              4.323790327137149,
              -0.006978380404142115,
              0.002917280985390569
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.00020515208913777892
          ],
          "max_abs_error": 0.0004187656968692721,
          "phase": "BCC_A2",
          "x_hi": 0.00020515208913777892,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 4.713246159309912,
            "slope": -4.147182932953316
          },
          "entropy": {
            "intercept": 0.017510373060244975,
            "slope": -0.015438834425377093
          },
          "intercept": -0.5074715686008969,
          "kind": "two_phase",
          "left": {
            "phase": "BCC_A2",
            "x": 0.00020515208913777892
          },
          "mu_a_rel": -0.5074715686008969,
          "mu_b_rel": -0.05156601762828561,
          "right": {
            "phase": "HCP_A3",
            "x": 0.999979184404231
          },
          "slope": 0.4559055509726113,
          "x_hi": 0.999979184404231,
          "x_lo": 0.00020515208913777892
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.5661495524401082,
                -0.5661692990088523,
                -0.0025332950317221714,
                0.0025530416004660994
              ]
            ],
            "knots": [
              0.999979184404231,
              1.0
            ],
            "max_abs_error": 0.0003662453080595651
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                3.3124618287915485e-05,
                -3.3309872179760017e-05,
                -1.7435999638370115e-05,
                1.7621253530214647e-05
              ]
            ],
            "knots": [
              0.999979184404231,
              1.0
            ],
            "max_abs_error": 2.527945199947104e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.5562734474985436,
              -0.5562379607985164,
              0.0026652485695891626,
              -0.002700735269616339
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.999979184404231,
            1.0
          ],
          "max_abs_error": 0.00038746153485400003,
          "phase": "HCP_A3",
          "x_hi": 1.0,
          "x_lo": 0.999979184404231
        }
      ],
      "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": "BCC_A2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.5073780386246654,
          "energy_per_atom": -0.5073780386246654,
          "enthalpy": 4.71239535606718,
          "entries_at_x": 1,
          "entropy": 0.017507205751108756,
          "formula": "",
          "nsites": null,
          "phase": "BCC_A2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.00020515208913777892
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.05157550757394347,
          "energy_per_atom": -0.05157550757394347,
          "enthalpy": 0.5661495524401082,
          "entries_at_x": 1,
          "entropy": 0.0020718600034044243,
          "formula": "",
          "nsites": null,
          "phase": "HCP_A3",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.999979184404231
        },
        {
          "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": "NbTi-16Yan",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:51:25Z",
    "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/NbTi-16Yan.tdb",
    "source_sha256": "334018575c889441556389b60667bef4bbecb9e41938d1eee7659a065d59fa85"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "NB-TI",
  "x_element": "TI"
}