{
  "counts": {
    "above_hull": 0,
    "entries": 7,
    "intervals": 6,
    "vertices": 7
  },
  "elements": [
    "NI",
    "SN"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "NI": {
          "energy": -8883.519847667301,
          "phase": "FCC_A1"
        },
        "SN": {
          "energy": -15259.305165931464,
          "phase": "BCT_A5"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -102012.6584113267
          },
          "entropy": {
            "intercept": 0.0,
            "slope": -13.950156160966657
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -97853.41935193448,
          "right": {
            "phase": "NI3SN_D019",
            "x": 0.25
          },
          "slope": -97853.41935193448,
          "x_hi": 0.25,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": -19801.028964367393,
            "slope": -22808.542553857125
          },
          "entropy": {
            "intercept": -4.506458135053995,
            "slope": 4.075676379249321
          },
          "intercept": -18457.428471401043,
          "kind": "two_phase",
          "left": {
            "phase": "NI3SN_D019",
            "x": 0.25
          },
          "mu_a_rel": -18457.428471401043,
          "mu_b_rel": -42481.13393773136,
          "right": {
            "phase": "NI3SN2_LT",
            "x": 0.38867423585345406
          },
          "slope": -24023.70546633032,
          "x_hi": 0.38867423585345406,
          "x_lo": 0.25
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -28666.1218124188,
                -963.2828494334859,
                858.3117312206897,
                0.0019008896259720132
              ]
            ],
            "knots": [
              0.38867423585345406,
              0.43042521537082756
            ],
            "max_abs_error": 0.0002814090948959347
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -8.477667244906787,
                -0.023966530981296034,
                -0.041705378237748864,
                -0.0008042383639780548
              ]
            ],
            "knots": [
              0.38867423585345406,
              0.43042521537082756
            ],
            "max_abs_error": 3.070190516929472e-05
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -26138.505323349844,
              -956.1372282221206,
              870.7461897437403,
              0.24168455708274905
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.38867423585345406,
            0.43042521537082756
          ],
          "max_abs_error": 0.008916200404200936,
          "phase": "NI3SN2_LT",
          "x_hi": 0.43042521537082756,
          "x_lo": 0.38867423585345406
        },
        {
          "enthalpy": {
            "intercept": -36213.14155759911,
            "slope": 17289.99664075334
          },
          "entropy": {
            "intercept": -1.6441193963094671,
            "slope": -2.828910218978426
          },
          "intercept": -35722.94735958947,
          "kind": "two_phase",
          "left": {
            "phase": "NI3SN2_LT",
            "x": 0.43042521537082756
          },
          "mu_a_rel": -35722.94735958947,
          "mu_b_rel": -17589.511137047673,
          "right": {
            "phase": "NI3SN4",
            "x": 0.5528763374533442
          },
          "slope": 18133.436222541794,
          "x_hi": 0.5528763374533442,
          "x_lo": 0.43042521537082756
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -26653.911540278783,
                381.9115885694516,
                471.78680409244544,
                -0.05703427396792904
              ]
            ],
            "knots": [
              0.5528763374533442,
              0.5769606609866207
            ],
            "max_abs_error": 0.00844611458160216
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -8.924723259349033,
                -0.1413576050189596,
                -0.04704606380097054,
                0.004151341789292995
              ]
            ],
            "knots": [
              0.5528763374533442,
              0.5769606609866207
            ],
            "max_abs_error": 5.786579366429123e-05
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -23993.005300503868,
              424.05735850596756,
              485.81358801541205,
              -1.2947568292627238
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.5528763374533442,
            0.5769606609866207
          ],
          "max_abs_error": 0.010746268344519194,
          "phase": "NI3SN4",
          "x_hi": 0.5769606609866207,
          "x_lo": 0.5528763374533442
        },
        {
          "enthalpy": {
            "intercept": -60987.874655020845,
            "slope": 60987.874655020845
          },
          "entropy": {
            "intercept": -8.142774846596977,
            "slope": 8.142774846596977
          },
          "intercept": -58560.10633450796,
          "kind": "two_phase",
          "left": {
            "phase": "NI3SN4",
            "x": 0.5769606609866207
          },
          "mu_a_rel": -58560.10633450796,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "BCT_A5",
            "x": 1.0
          },
          "slope": 58560.10633450796,
          "x_hi": 1.0,
          "x_lo": 0.5769606609866207
        }
      ],
      "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": -24463.35483798362,
          "energy_per_atom": -24463.35483798362,
          "enthalpy": -25503.164602831675,
          "entries_at_x": 1,
          "entropy": -3.487539040241664,
          "formula": "",
          "nsites": null,
          "phase": "NI3SN_D019",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.25
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -27794.823835895426,
          "energy_per_atom": -27794.823835895426,
          "enthalpy": -28666.1218124188,
          "entries_at_x": 1,
          "entropy": -2.922347732763292,
          "formula": "",
          "nsites": null,
          "phase": "NI3SN2_LT",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.38867423585345406
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -27917.859168088748,
          "energy_per_atom": -27917.859168088748,
          "enthalpy": -28771.091029741972,
          "entries_at_x": 1,
          "entropy": -2.861753686577991,
          "formula": "",
          "nsites": null,
          "phase": "NI3SN2_LT",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.43042521537082756
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -25697.399555426753,
          "energy_per_atom": -25697.399555426753,
          "enthalpy": -26653.911540278783,
          "entries_at_x": 1,
          "entropy": -3.208156917162597,
          "formula": "",
          "nsites": null,
          "phase": "NI3SN4",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5528763374533442
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -24773.228676303454,
          "energy_per_atom": -24773.228676303454,
          "enthalpy": -25800.270181890846,
          "entries_at_x": 1,
          "entropy": -3.444714088839156,
          "formula": "",
          "nsites": null,
          "phase": "NI3SN4",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5769606609866207
        },
        {
          "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-04Liu",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:54:11Z",
    "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-04Liu.tdb",
    "source_sha256": "061359e985b11ca5a7efb8a174aba2bbd91da01eb7998e717e8d3e5dd85e6823"
  },
  "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"
}
