{
  "counts": {
    "above_hull": 0,
    "entries": 8,
    "intervals": 7,
    "vertices": 8
  },
  "elements": [
    "NI",
    "SN"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "NI": {
          "energy": -8883.518873660678,
          "phase": "FCC_A1"
        },
        "SN": {
          "energy": -15259.304703421849,
          "phase": "BCT_A5"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -1.6813051266574537,
                -0.013142822000671961,
                0.006601060139467041
              ]
            ],
            "knots": [
              0.0,
              2.4008703975242057e-05
            ],
            "max_abs_error": 0.0009469599057146949
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                0.00016985517455940605,
                3.967455533550074e-05,
                -1.970451784689243e-05
              ]
            ],
            "knots": [
              0.0,
              2.4008703975242057e-05
            ],
            "max_abs_error": 2.8268340803063444e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -1.7319474471479688,
              -0.024971790350994283,
              0.012475962011837094
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            2.4008703975242057e-05
          ],
          "max_abs_error": 0.0017897804537444495,
          "phase": "FCC_A1",
          "x_hi": 2.4008703975242057e-05,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 0.738696561653801,
            "slope": -101069.32272040706
          },
          "entropy": {
            "intercept": 0.0026771555782761545,
            "slope": -6.845108368780489
          },
          "intercept": -0.059497374005585524,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 2.4008703975242057e-05
          },
          "mu_a_rel": -0.059497374005585524,
          "mu_b_rel": -99028.51315762918,
          "right": {
            "phase": "NI3SN_D019",
            "x": 0.24793023073592294
          },
          "slope": -99028.45366025517,
          "x_hi": 0.24793023073592294,
          "x_lo": 2.4008703975242057e-05
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -25057.401805832327,
                -220.87154096100014,
                -0.48210205058302336,
                0.5916225316747727
              ]
            ],
            "knots": [
              0.24793023073592294,
              0.25000005330817643
            ],
            "max_abs_error": 0.08486882822035113
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -6.350945481777087,
                -0.03621303578845625,
                -0.001828666985013272,
                -0.0006803341449040934
              ],
              [
                -6.389667518695458,
                -0.04191193983955765,
                0.018197441274297135,
                -0.02666320149781433
              ]
            ],
            "knots": [
              0.24793023073592294,
              0.2489651302151264,
              0.25000005330817643
            ],
            "max_abs_error": 0.0027622600978292056
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -23163.867410440493,
              -99.63759393820226,
              0.5724937564755095,
              0.2013688675560985
            ],
            [
              -23262.731141754663,
              -97.88943171376725,
              -5.682861507243274,
              8.239090636305832
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.24793023073592294,
            0.2489651302151264,
            0.25000005330817643
          ],
          "max_abs_error": 0.8635131128175999,
          "phase": "NI3SN_D019",
          "x_hi": 0.25000005330817643,
          "x_lo": 0.24793023073592294
        },
        {
          "enthalpy": {
            "intercept": -18413.984666879445,
            "slope": -27456.710783062423
          },
          "entropy": {
            "intercept": -3.641550751315428,
            "slope": 7.508080632233087
          },
          "intercept": -17328.25631037472,
          "kind": "two_phase",
          "left": {
            "phase": "NI3SN_D019",
            "x": 0.25000005330817643
          },
          "mu_a_rel": -17328.25631037472,
          "mu_b_rel": -47023.50133393753,
          "right": {
            "phase": "NI3SN2",
            "x": 0.38729224500816317
          },
          "slope": -29695.24502356281,
          "x_hi": 0.38729224500816317,
          "x_lo": 0.25000005330817643
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -29047.755826591532,
                -1107.716341443515,
                1099.3766436335961,
                83.66888213612151
              ]
            ],
            "knots": [
              0.38729224500816317,
              0.4265472656278923
            ],
            "max_abs_error": 0.004287780015147291
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -6.283811509511382,
                0.04485572262247246,
                0.07951946417314351,
                -0.009695692272247008
              ]
            ],
            "knots": [
              0.38729224500816317,
              0.4265472656278923
            ],
            "max_abs_error": 0.00013150464953692875
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -27174.23742503072,
              -1121.0900751438141,
              1075.6679153911039,
              86.55965278678082
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.38729224500816317,
            0.4265472656278923
          ],
          "max_abs_error": 0.03879198349750368,
          "phase": "NI3SN2",
          "x_hi": 0.4265472656278923,
          "x_lo": 0.38729224500816317
        },
        {
          "enthalpy": {
            "intercept": -42457.09454944158,
            "slope": 31613.53733525017
          },
          "entropy": {
            "intercept": 0.23942827279627577,
            "slope": -1.724211261142074
          },
          "intercept": -42528.48008897578,
          "kind": "two_phase",
          "left": {
            "phase": "NI3SN2",
            "x": 0.4265472656278923
          },
          "mu_a_rel": -42528.48008897578,
          "mu_b_rel": -10400.869166216115,
          "right": {
            "phase": "NI3SN4",
            "x": 0.5714285668973448
          },
          "slope": 32127.610922759668,
          "x_hi": 0.5714285668973448,
          "x_lo": 0.4265472656278923
        },
        {
          "enthalpy": {
            "intercept": -56915.17056751945,
            "slope": 56915.17056751945
          },
          "entropy": {
            "intercept": -1.7402823417018418,
            "slope": 1.7402823417018418
          },
          "intercept": -56396.305387341046,
          "kind": "two_phase",
          "left": {
            "phase": "NI3SN4",
            "x": 0.5714285668973448
          },
          "mu_a_rel": -56396.305387341046,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "BCT_A5",
            "x": 1.0
          },
          "slope": 56396.305387341046,
          "x_hi": 1.0,
          "x_lo": 0.5714285668973448
        }
      ],
      "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": -2.437042203060628,
          "energy_per_atom": -2.437042203060628,
          "enthalpy": -1.6878468885186584,
          "entries_at_x": 1,
          "entropy": 0.0025128133977716516,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 2.4008703975242057e-05
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -24552.206862782725,
          "energy_per_atom": -24552.206862782725,
          "enthalpy": -25057.401805832327,
          "entries_at_x": 1,
          "entropy": -1.6944321417058674,
          "formula": "",
          "nsites": null,
          "phase": "NI3SN_D019",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.24793023073592294
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -24752.069149264782,
          "energy_per_atom": -24752.069149264782,
          "enthalpy": -25278.163826312233,
          "entries_at_x": 1,
          "entropy": -1.7645301930150694,
          "formula": "",
          "nsites": null,
          "phase": "NI3SN_D019",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.25000005330817643
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -28828.994421617845,
          "energy_per_atom": -28828.994421617845,
          "enthalpy": -29047.755826591532,
          "entries_at_x": 1,
          "entropy": -0.7337293475555668,
          "formula": "",
          "nsites": null,
          "phase": "NI3SN2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.38729224500816317
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -28824.535498715843,
          "energy_per_atom": -28824.535498715843,
          "enthalpy": -28972.426642265338,
          "entries_at_x": 1,
          "entropy": -0.49602932600869565,
          "formula": "",
          "nsites": null,
          "phase": "NI3SN2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.4265472656278923
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -24169.845421547747,
          "energy_per_atom": -24169.845421547747,
          "enthalpy": -24392.216215403874,
          "entries_at_x": 1,
          "entropy": -0.7458352971864031,
          "formula": "",
          "nsites": null,
          "phase": "NI3SN4",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5714285668973448
        },
        {
          "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": "BCT_A5",
          "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": "NiSn-05Liu",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:54:09Z",
    "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/NiSn-05Liu.tdb",
    "source_sha256": "98f3d4a745f05d8d423af00cd9f6880a5443ab97eb7166791edd1d3ebb5f661c"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "NI-SN",
  "x_element": "SN"
}