{
  "counts": {
    "above_hull": 0,
    "entries": 6,
    "intervals": 5,
    "vertices": 6
  },
  "elements": [
    "BI",
    "NI"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "BI": {
          "energy": -16915.539881064426,
          "phase": "RHOMBOHEDRAL_A7"
        },
        "NI": {
          "energy": -8883.518784697702,
          "phase": "FCC_A1"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -22294.92687325295
          },
          "entropy": {
            "intercept": 0.0,
            "slope": -0.49745051612745783
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "RHOMBOHEDRAL_A7",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -22146.612001869536,
          "right": {
            "phase": "BI3NI",
            "x": 0.25
          },
          "slope": -22146.612001869536,
          "x_hi": 0.25,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": -7195.8882582653105,
            "slope": 6488.626159808292
          },
          "entropy": {
            "intercept": -2.3632039441440793,
            "slope": 8.95536526044886
          },
          "intercept": -6491.299002318745,
          "kind": "two_phase",
          "left": {
            "phase": "BI3NI",
            "x": 0.25
          },
          "mu_a_rel": -6491.299002318745,
          "mu_b_rel": -2672.7149949133,
          "right": {
            "phase": "BINI_B81",
            "x": 0.4979853030378461
          },
          "slope": 3818.584007405445,
          "x_hi": 0.4979853030378461,
          "x_lo": 0.25
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -3964.6477937738823,
                -11.171145862843918,
                2.0497409416009305e-05,
                -4.4050254466299066e-05
              ]
            ],
            "knots": [
              0.4979853030378461,
              0.49931271589110227
            ],
            "max_abs_error": 0.00014410538551601348
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -3.6666424856946414,
                -0.05455758117376551,
                -0.005585463339412414,
                -0.0041681624593434136
              ]
            ],
            "knots": [
              0.4979853030378461,
              0.49931271589110227
            ],
            "max_abs_error": 0.00013601867470347528
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -2871.4383366640277,
              5.095196964572127,
              1.6653263905294615,
              1.242693588067251
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.4979853030378461,
            0.49931271589110227
          ],
          "max_abs_error": 0.04052565610754755,
          "phase": "BINI_B81",
          "x_hi": 0.49931271589110227,
          "x_lo": 0.4979853030378461
        },
        {
          "enthalpy": {
            "intercept": -7941.161334659471,
            "slope": 7941.601015293835
          },
          "entropy": {
            "intercept": 4.057171782371897,
            "slope": -4.055548644727709
          },
          "intercept": -9150.807101573653,
          "kind": "two_phase",
          "left": {
            "phase": "BINI_B81",
            "x": 0.49931271589110227
          },
          "mu_a_rel": -9150.807101573653,
          "mu_b_rel": -0.04425785425155482,
          "right": {
            "phase": "FCC_A1",
            "x": 0.9999821276066876
          },
          "slope": 9150.762843719402,
          "x_hi": 0.9999821276066876,
          "x_lo": 0.49931271589110227
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.2977452174878842,
                -0.2977599249689929,
                -0.001546793415918013,
                0.0015615008970267241
              ]
            ],
            "knots": [
              0.9999821276066876,
              1.0
            ],
            "max_abs_error": 0.0002239907180077716
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -7.750370650269579e-05,
                7.729527154538398e-05,
                -1.8836782896709817e-05,
                1.9045217854021625e-05
              ]
            ],
            "knots": [
              0.9999821276066876,
              1.0
            ],
            "max_abs_error": 2.732037509051353e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.32085294758224925,
              -0.3208055095963751,
              0.004069392136244243,
              -0.004116830122118387
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.9999821276066876,
            1.0
          ],
          "max_abs_error": 0.0005905662954504842,
          "phase": "FCC_A1",
          "x_hi": 1.0,
          "x_lo": 0.9999821276066876
        }
      ],
      "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": "RHOMBOHEDRAL_A7",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -5536.653000467384,
          "energy_per_atom": -5536.653000467384,
          "enthalpy": -5573.731718313237,
          "entries_at_x": 1,
          "entropy": -0.12436262903186446,
          "formula": "",
          "nsites": null,
          "phase": "BI3NI",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.25
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -4589.700288215472,
          "energy_per_atom": -4589.700288215472,
          "enthalpy": -3964.6477937738823,
          "entries_at_x": 1,
          "entropy": 2.0964363388951455,
          "formula": "",
          "nsites": null,
          "phase": "BINI_B81",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.4979853030378461
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -4581.714853600732,
          "energy_per_atom": -4581.714853600732,
          "enthalpy": -3975.8189631895716,
          "entries_at_x": 1,
          "entropy": 2.032184774144426,
          "formula": "",
          "nsites": null,
          "phase": "BINI_B81",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.49931271589110227
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.20780388690218388,
          "energy_per_atom": -0.20780388690218388,
          "enthalpy": 0.2977452174878842,
          "entries_at_x": 1,
          "entropy": 0.0016956200046642778,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.9999821276066876
        },
        {
          "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": 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": "BiNi-07Vas",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:19:16Z",
    "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/BiNi-07Vas.tdb",
    "source_sha256": "f08f20b79c718bd34c3e60d0fc50f7c5116c9a6cd423b1ee6f8a136ae525faff"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "BI-NI",
  "x_element": "NI"
}
