{
  "counts": {
    "above_hull": 0,
    "entries": 5,
    "intervals": 4,
    "vertices": 5
  },
  "elements": [
    "CU",
    "SN"
  ],
  "flags": [
    "has_intermediate_phases",
    "redundant_phase_descriptions",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "CU": {
          "energy": -9883.67159984107,
          "phase": "FCC_A1"
        },
        "SN": {
          "energy": -15259.304652627448,
          "phase": "BCT_A5"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -216.81638239615592,
                2.0281373526326263,
                0.0014414001693410228
              ]
            ],
            "knots": [
              0.0,
              0.007171832751419511
            ],
            "max_abs_error": 0.0004077295834150618
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                -0.005257290963635795,
                -0.002104025828573719,
                2.6295864876003244e-06
              ]
            ],
            "knots": [
              0.0,
              0.007171832751419511
            ],
            "max_abs_error": 2.5541196008245677e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -215.2489210952137,
              2.6554526529444615,
              0.0006573893037966627
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.007171832751419511
          ],
          "max_abs_error": 0.0011692403444243382,
          "phase": "FCC_A1",
          "x_hi": 0.007171832751419511,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 113.15396819921128,
            "slope": -45726.215767881135
          },
          "entropy": {
            "intercept": 0.44827588960369047,
            "slope": -14.193104133451575
          },
          "intercept": -20.499488286126564,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.007171832751419511
          },
          "mu_a_rel": -20.499488286126564,
          "mu_b_rel": -41515.04125877867,
          "right": {
            "phase": "CU3SN_L",
            "x": 0.25
          },
          "slope": -41494.54177049254,
          "x_hi": 0.25,
          "x_lo": 0.007171832751419511
        },
        {
          "enthalpy": {
            "intercept": -15672.973140499624,
            "slope": 17418.292666914207
          },
          "entropy": {
            "intercept": -6.428048978405215,
            "slope": 13.312195338584049
          },
          "intercept": -13756.450337588103,
          "kind": "two_phase",
          "left": {
            "phase": "CU3SN_L",
            "x": 0.25
          },
          "mu_a_rel": -13756.450337588103,
          "mu_b_rel": -307.18871087274056,
          "right": {
            "phase": "CU6SN5_L",
            "x": 0.455
          },
          "slope": 13449.261626715363,
          "x_hi": 0.455,
          "x_lo": 0.25
        },
        {
          "enthalpy": {
            "intercept": -14215.871517529653,
            "slope": 14215.871517529653
          },
          "entropy": {
            "intercept": -0.6807341272467397,
            "slope": 0.6807341272467397
          },
          "intercept": -14012.910637491033,
          "kind": "two_phase",
          "left": {
            "phase": "CU6SN5_L",
            "x": 0.455
          },
          "mu_a_rel": -14012.910637491033,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "BCT_A5",
            "x": 1.0
          },
          "slope": 14012.910637491033,
          "x_hi": 1.0,
          "x_lo": 0.455
        }
      ],
      "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": -318.0914019608899,
          "energy_per_atom": -318.0914019608899,
          "enthalpy": -214.78680364335392,
          "entries_at_x": 1,
          "entropy": 0.34648532053509484,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.007171832751419511
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -10394.134930909262,
          "energy_per_atom": -10394.134930909262,
          "enthalpy": -11318.399973771073,
          "entries_at_x": 1,
          "entropy": -3.1000001437592033,
          "formula": "",
          "nsites": null,
          "phase": "CU3SN_L",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.25
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -7637.036297432613,
          "energy_per_atom": -7637.036297432613,
          "enthalpy": -7747.64997705366,
          "entries_at_x": 1,
          "entropy": -0.3710000993494731,
          "formula": "",
          "nsites": null,
          "phase": "CU6SN5_L",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.455
        },
        {
          "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-04Liu",
    "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": {
      "BCC_A2": "A2_BCC"
    },
    "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-04Liu.tdb",
    "source_sha256": "9154daa4811170706f521adb4abbf40be8c1e795344d89dd935ab8a986e6940d"
  },
  "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"
}