{
  "counts": {
    "above_hull": 0,
    "entries": 5,
    "intervals": 4,
    "vertices": 5
  },
  "elements": [
    "CU",
    "SN"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "CU": {
          "energy": -9883.671591887829,
          "phase": "FCC_A1"
        },
        "SN": {
          "energy": -15259.3046672796,
          "phase": "BCT_A5"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -183.39946253152553,
                4.604334457960306,
                -0.020393975889845706
              ]
            ],
            "knots": [
              0.0,
              0.008341364618176849
            ],
            "max_abs_error": 0.0002724966494582759
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                0.0020528861603177576,
                0.0016151273352671691,
                -2.5902329881139288e-05
              ]
            ],
            "knots": [
              0.0,
              0.008341364618176849
            ],
            "max_abs_error": 2.4671185063747728e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -184.0115305399366,
              4.122784242388519,
              -0.012671195960734849
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.008341364618176849
          ],
          "max_abs_error": 0.0010080680759472216,
          "phase": "FCC_A1",
          "x_hi": 0.008341364618176849,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 97.85261478243635,
            "slope": -33168.21041835264
          },
          "entropy": {
            "intercept": 0.4115869690201018,
            "slope": -0.8291486353568678
          },
          "intercept": -24.862040030905916,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.008341364618176849
          },
          "mu_a_rel": -24.862040030905916,
          "mu_b_rel": -32945.861792751915,
          "right": {
            "phase": "CU3SN_L",
            "x": 0.24999999999999997
          },
          "slope": -32920.99975272101,
          "x_hi": 0.24999999999999997,
          "x_lo": 0.008341364618176849
        },
        {
          "enthalpy": {
            "intercept": -9495.255533568527,
            "slope": 5204.22217505122
          },
          "entropy": {
            "intercept": 0.9500998011037977,
            "slope": -2.9831999636916517
          },
          "intercept": -9778.527789267631,
          "kind": "two_phase",
          "left": {
            "phase": "CU3SN_L",
            "x": 0.24999999999999997
          },
          "mu_a_rel": -9778.527789267631,
          "mu_b_rel": -3684.8645450417334,
          "right": {
            "phase": "CU6SN5_L",
            "x": 0.4545454545454546
          },
          "slope": 6093.663244225898,
          "x_hi": 0.4545454545454546,
          "x_lo": 0.24999999999999997
        },
        {
          "enthalpy": {
            "intercept": -13071.116665666283,
            "slope": 13071.116665666283
          },
          "entropy": {
            "intercept": -0.7441503343860809,
            "slope": 0.7441503343860809
          },
          "intercept": -12849.248243469076,
          "kind": "two_phase",
          "left": {
            "phase": "CU6SN5_L",
            "x": 0.4545454545454546
          },
          "mu_a_rel": -12849.248243469076,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "BCT_A5",
            "x": 1.0
          },
          "slope": 12849.248243469076,
          "x_hi": 1.0,
          "x_lo": 0.4545454545454546
        }
      ],
      "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": -299.4681025632617,
          "energy_per_atom": -299.4681025632617,
          "enthalpy": -178.8155220494551,
          "entries_at_x": 1,
          "entropy": 0.40467073792992636,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.008341364618176849
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -8255.111978211156,
          "energy_per_atom": -8255.111978211156,
          "enthalpy": -8194.199989805722,
          "entries_at_x": 1,
          "entropy": 0.20429981018088483,
          "formula": "",
          "nsites": null,
          "phase": "CU3SN_L",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.24999999999999997
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -7008.6808600740405,
          "energy_per_atom": -7008.6808600740405,
          "enthalpy": -7129.699999454336,
          "entries_at_x": 1,
          "entropy": -0.40590018239240777,
          "formula": "",
          "nsites": null,
          "phase": "CU6SN5_L",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.4545454545454546
        },
        {
          "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-11Wan",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:32:00Z",
    "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-11Wan.tdb",
    "source_sha256": "09295a811fc146474646a37e09cd808c5ebd268ddddf4c07fde0e95f983baeb1"
  },
  "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"
}
