{
  "counts": {
    "above_hull": 0,
    "entries": 7,
    "intervals": 6,
    "vertices": 7
  },
  "elements": [
    "NI",
    "SN"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "NI": {
          "energy": -8883.518856621773,
          "phase": "FCC_A1"
        },
        "SN": {
          "energy": -15259.304681921938,
          "phase": "BCT_A5"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -101195.9806117535
          },
          "entropy": {
            "intercept": 0.0,
            "slope": -11.757351846367577
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -97690.526158759,
          "right": {
            "phase": "NI3SN_D019",
            "x": 0.250000000000005
          },
          "slope": -97690.526158759,
          "x_hi": 0.250000000000005,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": -19747.25330250139,
            "slope": -22206.967401749513
          },
          "entropy": {
            "intercept": -6.795990671842774,
            "slope": 15.426610841002976
          },
          "intercept": -17721.028683691467,
          "kind": "two_phase",
          "left": {
            "phase": "NI3SN_D019",
            "x": 0.250000000000005
          },
          "mu_a_rel": -17721.028683691467,
          "mu_b_rel": -44527.440107686016,
          "right": {
            "phase": "NI3SN2_LT",
            "x": 0.3841363112762084
          },
          "slope": -26806.41142399455,
          "x_hi": 0.3841363112762084,
          "x_lo": 0.250000000000005
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -28277.755844840456,
                -704.7630344178694,
                712.2336029156454,
                103.30441017553449
              ]
            ],
            "knots": [
              0.3841363112762084,
              0.4181828055275597
            ],
            "max_abs_error": 0.005158068848686526
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -6.407940322770822,
                0.5638668042519118,
                -0.06630368394108971,
                -0.003480995813488541
              ]
            ],
            "knots": [
              0.3841363112762084,
              0.4181828055275597
            ],
            "max_abs_error": 1.4024785362387604e-05
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -26367.228437606333,
              -872.879922105996,
              732.0020462849551,
              104.34226907546883
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.3841363112762084,
            0.4181828055275597
          ],
          "max_abs_error": 0.0076640595762000885,
          "phase": "NI3SN2_LT",
          "x_hi": 0.4181828055275597,
          "x_lo": 0.3841363112762084
        },
        {
          "enthalpy": {
            "intercept": -38254.67865757353,
            "slope": 24122.698633388867
          },
          "entropy": {
            "intercept": 2.004784237198918,
            "slope": -5.421823086502647
          },
          "intercept": -38852.4050778944,
          "kind": "two_phase",
          "left": {
            "phase": "NI3SN2_LT",
            "x": 0.4181828055275597
          },
          "mu_a_rel": -38852.4050778944,
          "mu_b_rel": -13113.189891264741,
          "right": {
            "phase": "NI3SN4",
            "x": 0.5268600568569795
          },
          "slope": 25739.21518662966,
          "x_hi": 0.5268600568569795,
          "x_lo": 0.4181828055275597
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -25545.39228404249,
                893.6955033990363,
                356.67890913912606,
                -0.03313387450225491
              ]
            ],
            "knots": [
              0.5268600568569795,
              0.5548799261794997
            ],
            "max_abs_error": 0.004670714548410615
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -6.602901178527193,
                0.603556018140159,
                -0.1608671273828986,
                0.018954848831926496
              ]
            ],
            "knots": [
              0.5268600568569795,
              0.5548799261794997
            ],
            "max_abs_error": 0.0004363442171291254
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -23576.737297664607,
              713.7452765911974,
              404.6414431668286,
              -5.684522052868033
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.5268600568569795,
            0.5548799261794997
          ],
          "max_abs_error": 0.1263687289902009,
          "phase": "NI3SN4",
          "x_hi": 0.5548799261794997,
          "x_lo": 0.5268600568569795
        },
        {
          "enthalpy": {
            "intercept": -54580.89273946354,
            "slope": 54580.89273946354
          },
          "entropy": {
            "intercept": -0.9622016448420649,
            "slope": 0.9622016448420649
          },
          "intercept": -54294.01231905388,
          "kind": "two_phase",
          "left": {
            "phase": "NI3SN4",
            "x": 0.5548799261794997
          },
          "mu_a_rel": -54294.01231905388,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "BCT_A5",
            "x": 1.0
          },
          "slope": 54294.01231905388,
          "x_hi": 1.0,
          "x_lo": 0.5548799261794997
        }
      ],
      "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": -24422.63153969024,
          "energy_per_atom": -24422.63153969024,
          "enthalpy": -25298.99515293888,
          "entries_at_x": 1,
          "entropy": -2.939337961591953,
          "formula": "",
          "nsites": null,
          "phase": "NI3SN_D019",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.250000000000005
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -28018.344686657147,
          "energy_per_atom": -28018.344686657147,
          "enthalpy": -28277.755844840456,
          "entries_at_x": 1,
          "entropy": -0.8700692878863237,
          "formula": "",
          "nsites": null,
          "phase": "NI3SN2_LT",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.3841363112762084
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -28088.707859072038,
          "energy_per_atom": -28088.707859072038,
          "enthalpy": -28166.98086616714,
          "entries_at_x": 1,
          "entropy": -0.26252895218885186,
          "formula": "",
          "nsites": null,
          "phase": "NI3SN2_LT",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.4181828055275597
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -25291.44070121267,
          "energy_per_atom": -25291.44070121267,
          "enthalpy": -25545.39228404249,
          "entries_at_x": 1,
          "entropy": -0.8517577824243503,
          "formula": "",
          "nsites": null,
          "phase": "NI3SN4",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5268600568569795
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -24167.354771468417,
          "energy_per_atom": -24167.354771468417,
          "enthalpy": -24295.05100537882,
          "entries_at_x": 1,
          "entropy": -0.4282952671823068,
          "formula": "",
          "nsites": null,
          "phase": "NI3SN4",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5548799261794997
        },
        {
          "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-13Liu",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:54:22Z",
    "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-13Liu.tdb",
    "source_sha256": "e4e7faf54d0e9f3580a0ebd78fb38138d1943ded6c8b241e8bd5379190ad1ce9"
  },
  "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"
}