{
  "counts": {
    "above_hull": 0,
    "entries": 7,
    "intervals": 6,
    "vertices": 7
  },
  "elements": [
    "NI",
    "TI"
  ],
  "flags": [
    "has_intermediate_phases",
    "redundant_phase_descriptions",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "NI": {
          "energy": -8883.518922793419,
          "phase": "FCC_A1"
        },
        "TI": {
          "energy": -9159.168176260675,
          "phase": "HCP_A3"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -1843.6637871186563,
                41.97277806649549,
                0.9945612225362765
              ]
            ],
            "knots": [
              0.0,
              0.014051881657570058
            ],
            "max_abs_error": 0.01426485389742993
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                -0.15570261129990143,
                0.02185746035259517,
                0.00489405142223881
              ]
            ],
            "knots": [
              0.0,
              0.014051881657570058
            ],
            "max_abs_error": 5.416608051940497e-05
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -1797.241053559742,
              35.45597626274866,
              -0.46460020923245793
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.014051881657570058
          ],
          "max_abs_error": 0.003562277607898068,
          "phase": "FCC_A1",
          "x_hi": 0.014051881657570058,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 79.36823878581549,
            "slope": -133794.51467288777
          },
          "entropy": {
            "intercept": 0.4995618066576543,
            "slope": -1.011079831524234
          },
          "intercept": -69.57611386916415,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.014051881657570058
          },
          "mu_a_rel": -69.57611386916415,
          "mu_b_rel": -133562.63733498805,
          "right": {
            "phase": "NI3TI_D024",
            "x": 0.2499999999999826
          },
          "slope": -133493.06122111887,
          "x_hi": 0.2499999999999826,
          "x_lo": 0.014051881657570058
        },
        {
          "enthalpy": {
            "intercept": -35335.88744082768,
            "slope": 7866.508045576059
          },
          "entropy": {
            "intercept": -2.210365990188097,
            "slope": 9.828631355859526
          },
          "intercept": -34676.86682085311,
          "kind": "two_phase",
          "left": {
            "phase": "NI3TI_D024",
            "x": 0.2499999999999826
          },
          "mu_a_rel": -34676.86682085311,
          "mu_b_rel": -29740.76521402654,
          "right": {
            "phase": "B2_BCC",
            "x": 0.4995662736818865
          },
          "slope": 4936.101606826568,
          "x_hi": 0.4995662736818865,
          "x_lo": 0.2499999999999826
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -31406.045329610668,
                0.3958863238719964,
                0.009924095874773442,
                -3.097448777883427e-05
              ]
            ],
            "knots": [
              0.4995662736818865,
              0.4999999999593994
            ],
            "max_abs_error": 1.9950311980210245e-07
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -3.063456441783205,
                -0.005858818118605234,
                0.01030968926895054,
                -0.013896840022718682
              ]
            ],
            "knots": [
              0.4995662736818865,
              0.4999999999593994
            ],
            "max_abs_error": 0.0015545536299677032
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -30492.675791493006,
              2.1426929446470204,
              -3.0639097559712845,
              4.143311875867543
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.4995662736818865,
            0.4999999999593994
          ],
          "max_abs_error": 0.4634903620244586,
          "phase": "B2_BCC",
          "x_hi": 0.4999999999593994,
          "x_lo": 0.4995662736818865
        },
        {
          "enthalpy": {
            "intercept": -49195.10487833123,
            "slope": 35578.93065922069
          },
          "entropy": {
            "intercept": 11.673507934279513,
            "slope": -17.96652804804113
          },
          "intercept": -52675.56126893671,
          "kind": "two_phase",
          "left": {
            "phase": "B2_BCC",
            "x": 0.4999999999593994
          },
          "mu_a_rel": -52675.56126893671,
          "mu_b_rel": -11739.910272192494,
          "right": {
            "phase": "NITI2",
            "x": 0.6666666666666666
          },
          "slope": 40935.65099674422,
          "x_hi": 0.6666666666666666,
          "x_lo": 0.4999999999593994
        },
        {
          "enthalpy": {
            "intercept": -76427.4533165523,
            "slope": 76427.4533165523
          },
          "entropy": {
            "intercept": -0.9125322932437178,
            "slope": 0.9125322932437178
          },
          "intercept": -76155.38181332168,
          "kind": "two_phase",
          "left": {
            "phase": "NITI2",
            "x": 0.6666666666666666
          },
          "mu_a_rel": -76155.38181332168,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "HCP_A3",
            "x": 1.0
          },
          "slope": 76155.38181332168,
          "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": -1945.4048122550812,
          "energy_per_atom": -1945.4048122550812,
          "enthalpy": -1800.6964478296243,
          "entries_at_x": 1,
          "entropy": 0.4853542325187199,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.014051881657570058
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -33442.841419146556,
          "energy_per_atom": -33442.841419146556,
          "enthalpy": -33369.2604294338,
          "entries_at_x": 1,
          "entropy": 0.24679184877661342,
          "formula": "",
          "nsites": null,
          "phase": "NI3TI_D024",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.2499999999999826
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -32210.95693461559,
          "energy_per_atom": -32210.95693461559,
          "enthalpy": -31406.045329610668,
          "entries_at_x": 1,
          "entropy": 2.699686751651594,
          "formula": "",
          "nsites": null,
          "phase": "B2_BCC",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.4995662736818865
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -32207.73577222661,
          "energy_per_atom": -32207.73577222661,
          "enthalpy": -31405.63955016541,
          "entries_at_x": 1,
          "entropy": 2.6902439109884,
          "formula": "",
          "nsites": null,
          "phase": "B2_BCC",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.4999999999593994
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -25385.12727110723,
          "energy_per_atom": -25385.12727110723,
          "enthalpy": -25475.817772184106,
          "entries_at_x": 1,
          "entropy": -0.3041774310812393,
          "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-15San",
    "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": {
      "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/NiTi-15San.tdb",
    "source_sha256": "28f41732b6b51f8a075393cc9fa9f461848214f16385ef4951eacfaa36af4f12"
  },
  "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"
}