{
  "counts": {
    "above_hull": 0,
    "entries": 6,
    "intervals": 5,
    "vertices": 6
  },
  "elements": [
    "CU",
    "SI"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "CU": {
          "energy": -9883.671594034678,
          "phase": "FCC_A1"
        },
        "SI": {
          "energy": -5608.211660914544,
          "phase": "DIAMOND_A4"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -1036.0645081467926,
                283.8776876756911,
                -6.327646930888079
              ]
            ],
            "knots": [
              0.0,
              0.041734943984324514
            ],
            "max_abs_error": 0.0006042411595785779
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                1.2645620009355605,
                -0.11405865245470359,
                0.004127051249542157
              ]
            ],
            "knots": [
              0.0,
              0.041734943984324514
            ],
            "max_abs_error": 2.1412359944017467e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -1413.0936687254275,
              317.88427490422146,
              -7.558127260399942
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.041734943984324514
          ],
          "max_abs_error": 0.0012349759827543494,
          "phase": "FCC_A1",
          "x_hi": 0.041734943984324514,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 227.1912788878243,
            "slope": -23618.23575610982
          },
          "entropy": {
            "intercept": 2.1319325150754205,
            "slope": 11.13181325322577
          },
          "intercept": -408.4444004819104,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.041734943984324514
          },
          "mu_a_rel": -408.4444004819104,
          "mu_b_rel": -27345.63027804099,
          "right": {
            "phase": "CU33SI7_A13",
            "x": 0.17500000000000002
          },
          "slope": -26937.18587755908,
          "x_hi": 0.17500000000000002,
          "x_lo": 0.041734943984324514
        },
        {
          "enthalpy": {
            "intercept": -314.9999751749974,
            "slope": -20520.000018607985
          },
          "entropy": {
            "intercept": 3.981481284903363,
            "slope": 0.5629631399232408
          },
          "intercept": -1502.0786202689274,
          "kind": "two_phase",
          "left": {
            "phase": "CU33SI7_A13",
            "x": 0.17500000000000002
          },
          "mu_a_rel": -1502.0786202689274,
          "mu_b_rel": -22189.926099045057,
          "right": {
            "phase": "CU15SI4_D86",
            "x": 0.21052631578947367
          },
          "slope": -20687.84747877613,
          "x_hi": 0.21052631578947367,
          "x_lo": 0.17500000000000002
        },
        {
          "enthalpy": {
            "intercept": -3175.5405157155064,
            "slope": -6932.432451040566
          },
          "entropy": {
            "intercept": 5.18108088450298,
            "slope": -5.1351349581749375
          },
          "intercept": -4720.279781430079,
          "kind": "two_phase",
          "left": {
            "phase": "CU15SI4_D86",
            "x": 0.21052631578947367
          },
          "mu_a_rel": -4720.279781430079,
          "mu_b_rel": -10121.671744690735,
          "right": {
            "phase": "CU3SI_LT",
            "x": 0.23
          },
          "slope": -5401.391963260657,
          "x_hi": 0.23,
          "x_lo": 0.21052631578947367
        },
        {
          "enthalpy": {
            "intercept": -6194.805168123165,
            "slope": 6194.805168123165
          },
          "entropy": {
            "intercept": 5.1948049923671995,
            "slope": -5.1948049923671995
          },
          "intercept": -7743.636276597443,
          "kind": "two_phase",
          "left": {
            "phase": "CU3SI_LT",
            "x": 0.23
          },
          "mu_a_rel": -7743.636276597443,
          "mu_b_rel": -9.094947017729282e-13,
          "right": {
            "phase": "DIAMOND_A4",
            "x": 1.0
          },
          "slope": 7743.636276597442,
          "x_hi": 1.0,
          "x_lo": 0.23
        }
      ],
      "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": -1532.6663441771761,
          "energy_per_atom": -1532.6663441771761,
          "enthalpy": -758.5144674019895,
          "entries_at_x": 1,
          "entropy": 2.596518117642759,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.041734943984324514
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -5122.4519290547505,
          "energy_per_atom": -5122.4519290547505,
          "enthalpy": -3905.999978431395,
          "entries_at_x": 1,
          "entropy": 4.07999983438993,
          "formula": "",
          "nsites": null,
          "phase": "CU33SI7_A13",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.17500000000000002
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -5857.414931590218,
          "energy_per_atom": -5857.414931590218,
          "enthalpy": -4634.999979092468,
          "entries_at_x": 1,
          "entropy": 4.099999840676677,
          "formula": "",
          "nsites": null,
          "phase": "CU15SI4_D86",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.21052631578947367
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -5962.599932980031,
          "energy_per_atom": -5962.599932980031,
          "enthalpy": -4769.999979454837,
          "entries_at_x": 1,
          "entropy": 3.999999844122744,
          "formula": "",
          "nsites": null,
          "phase": "CU3SI_LT",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.23
        },
        {
          "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": "CuSi-16Hal",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:31:49Z",
    "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/CuSi-16Hal.tdb",
    "source_sha256": "858bf3eb9583bf24e2f6b1f5d86ac393828f016135da562cf4863fc887659b98"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "CU-SI",
  "x_element": "SI"
}
