{
  "counts": {
    "above_hull": 0,
    "entries": 8,
    "intervals": 7,
    "vertices": 8
  },
  "elements": [
    "PT",
    "SN"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "PT": {
          "energy": -12412.221448989609,
          "phase": "FCC_A1"
        },
        "SN": {
          "energy": -15259.304782215171,
          "phase": "BCT_A5"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -1423.4345499219971,
                14.905978906902192,
                0.004739226189258261
              ]
            ],
            "knots": [
              0.0,
              0.009541949050415333
            ],
            "max_abs_error": 0.002180375078637553
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                -0.005081236273400096,
                -0.0005546055612083911,
                -5.878567634102008e-06
              ]
            ],
            "knots": [
              0.0,
              0.009541949050415333
            ],
            "max_abs_error": 2.4011741293654063e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -1421.9195793272138,
              15.071334555276735,
              0.006491920958524133
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.009541949050415333
          ],
          "max_abs_error": 0.0028259359555704577,
          "phase": "FCC_A1",
          "x_hi": 0.009541949050415333,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 115.73516342706944,
            "slope": -159742.94005998998
          },
          "entropy": {
            "intercept": 0.5184877863637211,
            "slope": -7.97495168767736
          },
          "intercept": -38.85197007727584,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.009541949050415333
          },
          "mu_a_rel": -38.85197007727584,
          "mu_b_rel": -157404.0601843863,
          "right": {
            "phase": "PT3SN_L12",
            "x": 0.25
          },
          "slope": -157365.208214309,
          "x_hi": 0.25,
          "x_lo": 0.009541949050415333
        },
        {
          "enthalpy": {
            "intercept": -22356.499850821856,
            "slope": -69854.00000299429
          },
          "entropy": {
            "intercept": 2.8054998103635853,
            "slope": -17.122999783676818
          },
          "intercept": -23192.959619281755,
          "kind": "two_phase",
          "left": {
            "phase": "PT3SN_L12",
            "x": 0.25
          },
          "mu_a_rel": -23192.959619281755,
          "mu_b_rel": -87941.73723677284,
          "right": {
            "phase": "PTSN_B81",
            "x": 0.5
          },
          "slope": -64748.77761749108,
          "x_hi": 0.5,
          "x_lo": 0.25
        },
        {
          "enthalpy": {
            "intercept": -70981.9998508218,
            "slope": 27396.999997005598
          },
          "entropy": {
            "intercept": 12.655999810363543,
            "slope": -36.82399978367673
          },
          "intercept": -74755.38619428177,
          "kind": "two_phase",
          "left": {
            "phase": "PTSN_B81",
            "x": 0.5
          },
          "mu_a_rel": -74755.38619428177,
          "mu_b_rel": -36379.310661772826,
          "right": {
            "phase": "PT2SN3",
            "x": 0.6000000000000001
          },
          "slope": 38376.07553250895,
          "x_hi": 0.6000000000000001,
          "x_lo": 0.5
        },
        {
          "enthalpy": {
            "intercept": -103021.999850822,
            "slope": 80796.99999700591
          },
          "entropy": {
            "intercept": -4.3840001896363425,
            "slope": -8.423999783676928
          },
          "intercept": -101714.91019428194,
          "kind": "two_phase",
          "left": {
            "phase": "PT2SN3",
            "x": 0.6000000000000001
          },
          "mu_a_rel": -101714.91019428194,
          "mu_b_rel": -18406.294661772714,
          "right": {
            "phase": "PTSN2_C1",
            "x": 0.6666666666666666
          },
          "slope": 83308.61553250923,
          "x_hi": 0.6666666666666666,
          "x_lo": 0.6000000000000001
        },
        {
          "enthalpy": {
            "intercept": -148894.9998508218,
            "slope": 149606.4999970056
          },
          "entropy": {
            "intercept": -42.88700018963641,
            "slope": 49.33050021632317
          },
          "intercept": -136108.24074428168,
          "kind": "two_phase",
          "left": {
            "phase": "PTSN2_C1",
            "x": 0.6666666666666666
          },
          "mu_a_rel": -136108.24074428168,
          "mu_b_rel": -1209.6293867728673,
          "right": {
            "phase": "PTSN4_D1C",
            "x": 0.8
          },
          "slope": 134898.6113575088,
          "x_hi": 0.8,
          "x_lo": 0.6666666666666666
        },
        {
          "enthalpy": {
            "intercept": -146048.99926608652,
            "slope": 146048.99926608652
          },
          "entropy": {
            "intercept": -17.11300008288934,
            "slope": 17.11300008288934
          },
          "intercept": -140946.7582913731,
          "kind": "two_phase",
          "left": {
            "phase": "PTSN4_D1C",
            "x": 0.8
          },
          "mu_a_rel": -140946.7582913731,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "BCT_A5",
            "x": 1.0
          },
          "slope": 140946.7582913731,
          "x_hi": 1.0,
          "x_lo": 0.8
        }
      ],
      "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": -1540.4227691662127,
          "energy_per_atom": -1540.4227691662127,
          "enthalpy": -1408.5238317889055,
          "entries_at_x": 1,
          "entropy": 0.4423912036803799,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.009541949050415333
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -39380.154023654526,
          "energy_per_atom": -39380.154023654526,
          "enthalpy": -39819.99985157043,
          "entries_at_x": 1,
          "entropy": -1.4752501355556191,
          "formula": "",
          "nsites": null,
          "phase": "PT3SN_L12",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.25
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -55567.3484280273,
          "energy_per_atom": -55567.3484280273,
          "enthalpy": -57283.499852319,
          "entries_at_x": 1,
          "entropy": -5.756000081474824,
          "formula": "",
          "nsites": null,
          "phase": "PTSN_B81",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -51729.7408747764,
          "energy_per_atom": -51729.7408747764,
          "enthalpy": -54543.79985261844,
          "entries_at_x": 1,
          "entropy": -9.4384000598425,
          "formula": "",
          "nsites": null,
          "phase": "PT2SN3",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6000000000000001
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -46175.83317260913,
          "energy_per_atom": -46175.83317260913,
          "enthalpy": -49157.33318615139,
          "entries_at_x": 1,
          "entropy": -10.000000045420961,
          "formula": "",
          "nsites": null,
          "phase": "PTSN2_C1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6666666666666666
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -28189.35165827461,
          "energy_per_atom": -28189.35165827461,
          "enthalpy": -29209.799853217297,
          "entries_at_x": 1,
          "entropy": -3.422600016577867,
          "formula": "",
          "nsites": null,
          "phase": "PTSN4_D1C",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.8
        },
        {
          "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": "PtSn-01Su",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:58:31Z",
    "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/PtSn-01Su.tdb",
    "source_sha256": "eb26f28e6b499db9d638c9308dd13afbaa81efe40b8bad373f83ac42995389d9"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "PT-SN",
  "x_element": "SN"
}