{
  "counts": {
    "above_hull": 0,
    "entries": 6,
    "intervals": 5,
    "vertices": 6
  },
  "elements": [
    "CU",
    "SI"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "CU": {
          "energy": -9883.6797879955,
          "phase": "FCC_A1"
        },
        "SI": {
          "energy": -5608.212883485942,
          "phase": "DIAMOND_A4"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -2279.6119179894195,
                810.953100153173,
                -28.924889021215904
              ]
            ],
            "knots": [
              0.0,
              0.05581008212617226
            ],
            "max_abs_error": 0.05611763612944287
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                0.7026970269566679,
                0.0838114563941953,
                -0.004244394908368032
              ]
            ],
            "knots": [
              0.0,
              0.05581008212617226
            ],
            "max_abs_error": 0.00018859136216559103
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -2489.1210365762313,
              785.9647144285176,
              -27.659422678879196
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.05581008212617226
          ],
          "max_abs_error": 0.11232441562810891,
          "phase": "FCC_A1",
          "x_hi": 0.05581008212617226,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": -232.1924544593951,
            "slope": -22673.16592613755
          },
          "entropy": {
            "intercept": 2.1492568653596065,
            "slope": 7.578235847663427
          },
          "intercept": -872.9933888663638,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.05581008212617226
          },
          "mu_a_rel": -872.9933888663638,
          "mu_b_rel": -25805.610332984746,
          "right": {
            "phase": "CU33SI7_A13",
            "x": 0.17500000000000002
          },
          "slope": -24932.61694411838,
          "x_hi": 0.17500000000000002,
          "x_lo": 0.05581008212617226
        },
        {
          "enthalpy": {
            "intercept": -751.8477665382015,
            "slope": -19703.706999972943
          },
          "entropy": {
            "intercept": 3.480125569317944,
            "slope": -0.026728174955645032
          },
          "intercept": -1789.4472050303384,
          "kind": "two_phase",
          "left": {
            "phase": "CU33SI7_A13",
            "x": 0.17500000000000002
          },
          "mu_a_rel": -1789.4472050303384,
          "mu_b_rel": -21485.185199640295,
          "right": {
            "phase": "CU15SI4",
            "x": 0.21052631578947367
          },
          "slope": -19695.737994609957,
          "x_hi": 0.21052631578947367,
          "x_lo": 0.17500000000000002
        },
        {
          "enthalpy": {
            "intercept": 2932.546524599332,
            "slope": -37204.57988287623
          },
          "entropy": {
            "intercept": 25.009033601960653,
            "slope": -102.28904133000852
          },
          "intercept": -4523.896843825219,
          "kind": "two_phase",
          "left": {
            "phase": "CU15SI4",
            "x": 0.21052631578947367
          },
          "mu_a_rel": -4523.896843825219,
          "mu_b_rel": -11230.999054159493,
          "right": {
            "phase": "CU19SI6",
            "x": 0.24
          },
          "slope": -6707.102210334275,
          "x_hi": 0.24,
          "x_lo": 0.21052631578947367
        },
        {
          "enthalpy": {
            "intercept": -7890.200851698634,
            "slope": 7890.200851698634
          },
          "entropy": {
            "intercept": 0.6048206352086968,
            "slope": -0.6048206352086968
          },
          "intercept": -8070.528124086111,
          "kind": "two_phase",
          "left": {
            "phase": "CU19SI6",
            "x": 0.24
          },
          "mu_a_rel": -8070.528124086111,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "DIAMOND_A4",
            "x": 1.0
          },
          "slope": 8070.528124086111,
          "x_hi": 1.0,
          "x_lo": 0.24
        }
      ],
      "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": -2264.4847881380047,
          "energy_per_atom": -2264.4847881380047,
          "enthalpy": -1497.5837068574622,
          "entries_at_x": 1,
          "entropy": 2.5721988303892047,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.05581008212617226
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -5236.201354087081,
          "energy_per_atom": -5236.201354087081,
          "enthalpy": -4199.996491533467,
          "entries_at_x": 1,
          "entropy": 3.475448138700706,
          "formula": "",
          "nsites": null,
          "phase": "CU33SI7_A13",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.17500000000000002
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -5935.918361790329,
          "energy_per_atom": -5935.918361790329,
          "enthalpy": -4899.996608637768,
          "entries_at_x": 1,
          "entropy": 3.4744985851167556,
          "formula": "",
          "nsites": null,
          "phase": "CU15SI4",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.21052631578947367
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -6133.601374305445,
          "energy_per_atom": -6133.601374305445,
          "enthalpy": -5996.552647290962,
          "entries_at_x": 1,
          "entropy": 0.4596636827586096,
          "formula": "",
          "nsites": null,
          "phase": "CU19SI6",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.24
        },
        {
          "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-99Fri-alt",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:31:57Z",
    "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-99Fri-alt.tdb",
    "source_sha256": "290a3b7d57ad7f6c05ce0cf34c3209e9e32d2d4178945aaf608b3402547cc078"
  },
  "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"
}