{
  "counts": {
    "above_hull": 0,
    "entries": 5,
    "intervals": 4,
    "vertices": 5
  },
  "elements": [
    "CU",
    "SN"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "CU": {
          "energy": -9883.671589388416,
          "phase": "FCC_A1"
        },
        "SN": {
          "energy": -15259.304652574754,
          "phase": "BCT_A5"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -53.773399276756685,
                0.44258820728899906,
                0.005995956691890569
              ]
            ],
            "knots": [
              0.0,
              0.0029792326027798235
            ],
            "max_abs_error": 0.0007810866152837548
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                0.015085603404901298,
                6.856829832437711e-05,
                -3.892216752169643e-05
              ]
            ],
            "knots": [
              0.0,
              0.0029792326027798235
            ],
            "max_abs_error": 2.328281023783463e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -58.27117193222966,
              0.42214456938765466,
              0.017600601001220184
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.0029792326027798235
          ],
          "max_abs_error": 0.0014752636766175442,
          "phase": "FCC_A1",
          "x_hi": 0.0029792326027798235,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 47.99016547296146,
            "slope": -34007.07299295919
          },
          "entropy": {
            "intercept": 0.18726405057693762,
            "slope": -1.123210160680495
          },
          "intercept": -7.842611206547332,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.0029792326027798235
          },
          "mu_a_rel": -7.842611206547332,
          "mu_b_rel": -33680.03049475886,
          "right": {
            "phase": "CU3SN",
            "x": 0.25
          },
          "slope": -33672.18788355231,
          "x_hi": 0.25,
          "x_lo": 0.0029792326027798235
        },
        {
          "enthalpy": {
            "intercept": -8962.981739063302,
            "slope": 2036.8146251858632
          },
          "entropy": {
            "intercept": 1.585998075242845,
            "slope": -6.718146259344125
          },
          "intercept": -9435.847065196951,
          "kind": "two_phase",
          "left": {
            "phase": "CU3SN",
            "x": 0.25
          },
          "mu_a_rel": -9435.847065196951,
          "mu_b_rel": -5396.017132787651,
          "right": {
            "phase": "CU6SN5",
            "x": 0.454999138139131
          },
          "slope": 4039.8299324093,
          "x_hi": 0.454999138139131,
          "x_lo": 0.25
        },
        {
          "enthalpy": {
            "intercept": -14745.35803964672,
            "slope": 14745.35803964672
          },
          "entropy": {
            "intercept": -2.698624507912835,
            "slope": 2.698624507912835
          },
          "intercept": -13940.763142612512,
          "kind": "two_phase",
          "left": {
            "phase": "CU6SN5",
            "x": 0.454999138139131
          },
          "mu_a_rel": -13940.763142612512,
          "mu_b_rel": -1.8189894035458565e-12,
          "right": {
            "phase": "BCT_A5",
            "x": 1.0
          },
          "slope": 13940.76314261251,
          "x_hi": 1.0,
          "x_lo": 0.454999138139131
        }
      ],
      "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": -108.15989115615412,
          "energy_per_atom": -108.15989115615412,
          "enthalpy": -53.32481511277579,
          "entries_at_x": 1,
          "entropy": 0.18391774624646473,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0029792326027798235
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -8425.889582094625,
          "energy_per_atom": -8425.889582094625,
          "enthalpy": -8453.778082766836,
          "entries_at_x": 1,
          "entropy": -0.09353848959318611,
          "formula": "",
          "nsites": null,
          "phase": "CU3SN",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.25
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -7597.727927722055,
          "energy_per_atom": -7597.727927722055,
          "enthalpy": -8036.232840054557,
          "entries_at_x": 1,
          "entropy": -1.4707526826513586,
          "formula": "",
          "nsites": null,
          "phase": "CU6SN5",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.454999138139131
        },
        {
          "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": "CuSn-12Gie",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:31:59Z",
    "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/CuSn-12Gie.tdb",
    "source_sha256": "9ef08747a43ce1af82a41281d0327108d95c7adb58ba71405d64120707c12f20"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "CU-SN",
  "x_element": "SN"
}
