{
  "counts": {
    "above_hull": 0,
    "entries": 9,
    "intervals": 8,
    "vertices": 9
  },
  "elements": [
    "NI",
    "SI"
  ],
  "flags": [
    "degenerate_boundary_phase",
    "has_intermediate_phases",
    "redundant_phase_descriptions",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "NI": {
          "energy": -8883.518977839982,
          "phase": "FCC_4SL"
        },
        "SI": {
          "energy": -5608.211746518712,
          "phase": "DIAMOND_A4"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -7176.986475439467,
                515.3131313308759,
                20.267554752046635
              ]
            ],
            "knots": [
              0.0,
              0.039389589274735286
            ],
            "max_abs_error": 0.7261197240914044
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                0.5672056920841209,
                0.08492725721721195,
                0.1135008352661766
              ]
            ],
            "knots": [
              0.0,
              0.039389589274735286
            ],
            "max_abs_error": 0.003170413224161006
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -7346.098852533933,
              489.99206959057574,
              -13.57271928199134
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.039389589274735286
          ],
          "max_abs_error": 0.2191389787199114,
          "phase": "FCC_4SL#1",
          "x_hi": 0.039389589274735286,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 166.607062582254,
            "slope": -172837.87359279473
          },
          "entropy": {
            "intercept": 2.4452693263821437,
            "slope": -7.602011657656991
          },
          "intercept": -562.449987078583,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_4SL#1",
            "x": 0.039389589274735286
          },
          "mu_a_rel": -562.449987078583,
          "mu_b_rel": -171133.78380414285,
          "right": {
            "phase": "FCC_4SL#2",
            "x": 0.24999998249510139
          },
          "slope": -170571.33381706427,
          "x_hi": 0.24999998249510139,
          "x_lo": 0.039389589274735286
        },
        {
          "enthalpy": {
            "intercept": -29893.040329916534,
            "slope": -52599.275603741706
          },
          "entropy": {
            "intercept": -11.77760782210627,
            "slope": 49.28950091981731
          },
          "intercept": -26381.546557755515,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_4SL#2",
            "x": 0.24999998249510139
          },
          "mu_a_rel": -26381.546557755515,
          "mu_b_rel": -93676.48686074089,
          "right": {
            "phase": "NI5SI2",
            "x": 0.2857142857142857
          },
          "slope": -67294.94030298537,
          "x_hi": 0.2857142857142857,
          "x_lo": 0.24999998249510139
        },
        {
          "enthalpy": {
            "intercept": -43173.798025044875,
            "slope": -6116.623670792513
          },
          "entropy": {
            "intercept": -12.89545620500919,
            "slope": 53.20197025997752
          },
          "intercept": -39329.0177575214,
          "kind": "two_phase",
          "left": {
            "phase": "NI5SI2",
            "x": 0.2857142857142857
          },
          "mu_a_rel": -39329.0177575214,
          "mu_b_rel": -61307.80886132618,
          "right": {
            "phase": "NI2SI_C37",
            "x": 0.3333333333333333
          },
          "slope": -21978.791103804782,
          "x_hi": 0.3333333333333333,
          "x_lo": 0.2857142857142857
        },
        {
          "enthalpy": {
            "intercept": -42034.155457652596,
            "slope": -9535.551372969343
          },
          "entropy": {
            "intercept": 19.3497550463386,
            "slope": -43.533663494065856
          },
          "intercept": -47803.28492471851,
          "kind": "two_phase",
          "left": {
            "phase": "NI2SI_C37",
            "x": 0.3333333333333333
          },
          "mu_a_rel": -47803.28492471851,
          "mu_b_rel": -44359.27452693196,
          "right": {
            "phase": "NI3SI2",
            "x": 0.4
          },
          "slope": 3444.0103977865488,
          "x_hi": 0.4,
          "x_lo": 0.3333333333333333
        },
        {
          "enthalpy": {
            "intercept": -54053.782976926,
            "slope": 20513.517425214162
          },
          "entropy": {
            "intercept": 4.69778697666082,
            "slope": -6.903743319871404
          },
          "intercept": -55454.42816401743,
          "kind": "two_phase",
          "left": {
            "phase": "NI3SI2",
            "x": 0.4
          },
          "mu_a_rel": -55454.42816401743,
          "mu_b_rel": -32882.55966798357,
          "right": {
            "phase": "NISI_B31",
            "x": 0.5
          },
          "slope": 22571.86849603386,
          "x_hi": 0.5,
          "x_lo": 0.4
        },
        {
          "enthalpy": {
            "intercept": -80411.90584378886,
            "slope": 73229.76315893988
          },
          "entropy": {
            "intercept": 6.76682007034949,
            "slope": -11.041809507248745
          },
          "intercept": -82429.43324776349,
          "kind": "two_phase",
          "left": {
            "phase": "NISI_B31",
            "x": 0.5
          },
          "mu_a_rel": -82429.43324776349,
          "mu_b_rel": -5907.5545842374995,
          "right": {
            "phase": "NISI2_C1",
            "x": 0.6666666666666666
          },
          "slope": 76521.87866352599,
          "x_hi": 0.6666666666666666,
          "x_lo": 0.5
        },
        {
          "enthalpy": {
            "intercept": -94776.19121348682,
            "slope": 94776.19121348682
          },
          "entropy": {
            "intercept": -1.7831588034490193,
            "slope": 1.7831588034490193
          },
          "intercept": -94244.5424162385,
          "kind": "two_phase",
          "left": {
            "phase": "NISI2_C1",
            "x": 0.6666666666666666
          },
          "mu_a_rel": -94244.5424162385,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "DIAMOND_A4",
            "x": 1.0
          },
          "slope": 94244.5424162385,
          "x_hi": 1.0,
          "x_lo": 0.6666666666666666
        }
      ],
      "phase_instances": {
        "FCC_4SL#1": "FCC_4SL",
        "FCC_4SL#2": "FCC_4SL"
      },
      "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_4SL#1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [
            {
              "energy": -7281.18476817651,
              "phase": "A1_FCC"
            }
          ],
          "energy": -7281.18476817651,
          "energy_per_atom": -7281.18476817651,
          "enthalpy": -6641.405789356546,
          "entries_at_x": 1,
          "entropy": 2.145829209525285,
          "formula": "",
          "nsites": null,
          "phase": "FCC_4SL#1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.039389589274735286
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -43205.28045551075,
          "energy_per_atom": -43205.28045551075,
          "enthalpy": -43042.858310106974,
          "entries_at_x": 1,
          "entropy": 0.5447665450403392,
          "formula": "",
          "nsites": null,
          "phase": "FCC_4SL#2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.24999998249510139
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -45608.67235860848,
          "energy_per_atom": -45608.67235860848,
          "enthalpy": -44921.40478812845,
          "entries_at_x": 1,
          "entropy": 2.3051067264129586,
          "formula": "",
          "nsites": null,
          "phase": "NI5SI2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.2857142857142857
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -46655.28145878966,
          "energy_per_atom": -46655.28145878966,
          "enthalpy": -45212.67258197571,
          "entries_at_x": 1,
          "entropy": 4.838533881649983,
          "formula": "",
          "nsites": null,
          "phase": "NI2SI_C37",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.3333333333333333
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -46425.68076560389,
          "energy_per_atom": -46425.68076560389,
          "enthalpy": -45848.376006840335,
          "entries_at_x": 1,
          "entropy": 1.9362896487122576,
          "formula": "",
          "nsites": null,
          "phase": "NI3SI2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.4
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -44168.4939160005,
          "energy_per_atom": -44168.4939160005,
          "enthalpy": -43797.02426431892,
          "entries_at_x": 1,
          "entropy": 1.2459153167251173,
          "formula": "",
          "nsites": null,
          "phase": "NISI_B31",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -31414.847472079506,
          "energy_per_atom": -31414.847472079506,
          "enthalpy": -31592.063737828943,
          "entries_at_x": 1,
          "entropy": -0.5943862678163399,
          "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-12Yua",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:53:57Z",
    "phase_families": {
      "FCC_A1": "A1_FCC"
    },
    "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-12Yua.tdb",
    "source_sha256": "8ae79a3ebc52338b4e53f1c3eb67e682d1d3004354d9e112de2c87ec59152b48"
  },
  "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"
}