{
  "counts": {
    "above_hull": 0,
    "entries": 8,
    "intervals": 7,
    "vertices": 8
  },
  "elements": [
    "NI",
    "SI"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "NI": {
          "energy": -8883.519020281747,
          "phase": "FCC_A1"
        },
        "SI": {
          "energy": -5608.211750000601,
          "phase": "DIAMOND_A4"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -28037.356168563518,
                6436.637605053278,
                -279.61145206360743
              ]
            ],
            "knots": [
              0.0,
              0.11976242833721318
            ],
            "max_abs_error": 0.019247935353632784
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                -2.0761705384473808,
                0.5829121641307845,
                0.0031512053296304243
              ]
            ],
            "knots": [
              0.0,
              0.11976242833721318
            ],
            "max_abs_error": 3.154794399118366e-05
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -27418.34592252552,
              6262.842343317268,
              -280.55098393213484
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.11976242833721318
          ],
          "max_abs_error": 0.02626611450978089,
          "phase": "FCC_A1",
          "x_hi": 0.11976242833721318,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": -5493.5438221531695,
            "slope": -136827.4376274391
          },
          "entropy": {
            "intercept": 1.7589255999907323,
            "slope": -1.6882296079346508
          },
          "intercept": -6017.96748979041,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.11976242833721318
          },
          "mu_a_rel": -6017.96748979041,
          "mu_b_rel": -142342.05945962376,
          "right": {
            "phase": "NI3SI_L12",
            "x": 0.237
          },
          "slope": -136324.09196983336,
          "x_hi": 0.237,
          "x_lo": 0.11976242833721318
        },
        {
          "enthalpy": {
            "intercept": -17221.950149855304,
            "slope": -87340.49109705036
          },
          "entropy": {
            "intercept": -1.3406502543436916,
            "slope": 11.39014952427811
          },
          "intercept": -16822.235276522693,
          "kind": "two_phase",
          "left": {
            "phase": "NI3SI_L12",
            "x": 0.237
          },
          "mu_a_rel": -16822.235276522693,
          "mu_b_rel": -107558.69945423672,
          "right": {
            "phase": "NI5SI2",
            "x": 0.2857142857142857
          },
          "slope": -90736.46417771402,
          "x_hi": 0.2857142857142857,
          "x_lo": 0.237
        },
        {
          "enthalpy": {
            "intercept": -40745.92668944481,
            "slope": -5006.573208487078
          },
          "entropy": {
            "intercept": 4.312149452401234,
            "slope": -8.39464944932913
          },
          "intercept": -42031.594048678264,
          "kind": "two_phase",
          "left": {
            "phase": "NI5SI2",
            "x": 0.2857142857142857
          },
          "mu_a_rel": -42031.594048678264,
          "mu_b_rel": -44535.30252384778,
          "right": {
            "phase": "NI3SI2",
            "x": 0.4
          },
          "slope": -2503.708475169514,
          "x_hi": 0.4,
          "x_lo": 0.2857142857142857
        },
        {
          "enthalpy": {
            "intercept": -58908.92668944484,
            "slope": 40400.92679151298
          },
          "entropy": {
            "intercept": -0.8818505475988236,
            "slope": 4.590350550671013
          },
          "intercept": -58646.0029486782,
          "kind": "two_phase",
          "left": {
            "phase": "NI3SI2",
            "x": 0.4
          },
          "mu_a_rel": -58646.0029486782,
          "mu_b_rel": -19613.689173847866,
          "right": {
            "phase": "NISI_B31",
            "x": 0.5
          },
          "slope": 39032.313774830334,
          "x_hi": 0.5,
          "x_lo": 0.4
        },
        {
          "enthalpy": {
            "intercept": -52922.926689444765,
            "slope": 28428.92679151285
          },
          "entropy": {
            "intercept": 19.70614945240122,
            "slope": -36.585649449329075
          },
          "intercept": -58798.31514867823,
          "kind": "two_phase",
          "left": {
            "phase": "NISI_B31",
            "x": 0.5
          },
          "mu_a_rel": -58798.31514867823,
          "mu_b_rel": -19461.376973847837,
          "right": {
            "phase": "NISI2_C1",
            "x": 0.6666666666666666
          },
          "slope": 39336.93817483039,
          "x_hi": 0.6666666666666666,
          "x_lo": 0.5
        },
        {
          "enthalpy": {
            "intercept": -101910.92648530859,
            "slope": 101910.92648530859
          },
          "entropy": {
            "intercept": -14.052850541454484,
            "slope": 14.052850541454484
          },
          "intercept": -97721.0690963739,
          "kind": "two_phase",
          "left": {
            "phase": "NISI2_C1",
            "x": 0.6666666666666666
          },
          "mu_a_rel": -97721.0690963739,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "DIAMOND_A4",
            "x": 1.0
          },
          "slope": 97721.0690963739,
          "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": -22344.471784963236,
          "energy_per_atom": -22344.471784963236,
          "enthalpy": -21880.33001557385,
          "entries_at_x": 1,
          "entropy": 1.5567391225536973,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.11976242833721318
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -38326.777286640914,
          "energy_per_atom": -38326.777286640914,
          "enthalpy": -37921.646539856236,
          "entries_at_x": 1,
          "entropy": 1.3588151829102202,
          "formula": "",
          "nsites": null,
          "phase": "NI3SI_L12",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.237
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -42746.939327298125,
          "energy_per_atom": -42746.939327298125,
          "enthalpy": -42176.376177583974,
          "entries_at_x": 1,
          "entropy": 1.9136781811643395,
          "formula": "",
          "nsites": null,
          "phase": "NI5SI2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.2857142857142857
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -43033.07743874607,
          "energy_per_atom": -43033.07743874607,
          "enthalpy": -42748.55597283964,
          "entries_at_x": 1,
          "entropy": 0.9542896726695815,
          "formula": "",
          "nsites": null,
          "phase": "NI3SI2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.4
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -39129.84606126304,
          "energy_per_atom": -39129.84606126304,
          "enthalpy": -38708.46329368834,
          "entries_at_x": 1,
          "entropy": 1.4133247277366827,
          "formula": "",
          "nsites": null,
          "phase": "NISI_B31",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -32573.689698791306,
          "energy_per_atom": -32573.689698791306,
          "enthalpy": -33970.3088284362,
          "entries_at_x": 1,
          "entropy": -4.684283513818162,
          "formula": "",
          "nsites": null,
          "phase": "NISI2_C1",
          "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": "DIAMOND_A4",
          "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": "NiSi-01Tok",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:53:25Z",
    "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/NiSi-01Tok.tdb",
    "source_sha256": "9ab1c4ee638279e6f5bb7849086025714b58118c973067abf979207e70939150"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "NI-SI",
  "x_element": "SI"
}