{
  "counts": {
    "above_hull": 0,
    "entries": 7,
    "intervals": 6,
    "vertices": 7
  },
  "elements": [
    "CO",
    "SN"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "CO": {
          "energy": -8956.449353725166,
          "phase": "HCP_A3"
        },
        "SN": {
          "energy": -15259.304674901381,
          "phase": "BCT_A5"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -33697.958142326876
          },
          "entropy": {
            "intercept": 0.0,
            "slope": -5.138933729318701
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "HCP_A3",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -32165.785050930506,
          "right": {
            "phase": "CO3SN2_B82",
            "x": 0.4000567580257212
          },
          "slope": -32165.785050930506,
          "x_hi": 0.4000567580257212,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -13481.095886505744,
                0.3516007214053245,
                -6.155585980371914e-05,
                -6.734593517299103e-07
              ]
            ],
            "knots": [
              0.4000567580257212,
              0.4000722360088638
            ],
            "max_abs_error": 1.0384610504843295e-08
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -7.6517868026348905,
                0.0027969589295804695,
                -4.3594462474503236e-05,
                3.1095332343666557e-06
              ]
            ],
            "knots": [
              0.4000567580257212,
              0.4000722360088638
            ],
            "max_abs_error": 2.330246928750057e-08
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -11199.715651300154,
              -0.4823125827404426,
              0.01293613221686224,
              -0.0009277805901435898
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.4000567580257212,
            0.4000722360088638
          ],
          "max_abs_error": 6.957841833354905e-06,
          "phase": "CO3SN2_B82",
          "x_hi": 0.4000722360088638,
          "x_lo": 0.4000567580257212
        },
        {
          "enthalpy": {
            "intercept": -835.0647313255686,
            "slope": -31608.49086365472
          },
          "entropy": {
            "intercept": -0.7989559947973095,
            "slope": -3.134685290839075
          },
          "intercept": -596.8560014767518,
          "kind": "two_phase",
          "left": {
            "phase": "CO3SN2_B82",
            "x": 0.4000722360088638
          },
          "mu_a_rel": -596.8560014767518,
          "mu_b_rel": -31270.740445667805,
          "right": {
            "phase": "COSN_B35",
            "x": 0.5
          },
          "slope": -30673.884444191055,
          "x_hi": 0.5,
          "x_lo": 0.4000722360088638
        },
        {
          "enthalpy": {
            "intercept": -27978.620363727692,
            "slope": 22678.620401149532
          },
          "entropy": {
            "intercept": -4.222965702263053,
            "slope": 3.7133341240924134
          },
          "intercept": -26719.54313959797,
          "kind": "two_phase",
          "left": {
            "phase": "COSN_B35",
            "x": 0.5
          },
          "mu_a_rel": -26719.54313959797,
          "mu_b_rel": -5148.053307546586,
          "right": {
            "phase": "COSN2_C16",
            "x": 0.6666666666666666
          },
          "slope": 21571.489832051382,
          "x_hi": 0.6666666666666666,
          "x_lo": 0.5
        },
        {
          "enthalpy": {
            "intercept": -40978.62036372765,
            "slope": 42178.62040114946
          },
          "entropy": {
            "intercept": -14.398148902263182,
            "slope": 18.976108924092607
          },
          "intercept": -36685.8122685179,
          "kind": "two_phase",
          "left": {
            "phase": "COSN2_C16",
            "x": 0.6666666666666666
          },
          "mu_a_rel": -36685.8122685179,
          "mu_b_rel": -164.91874308662955,
          "right": {
            "phase": "COSN3",
            "x": 0.75
          },
          "slope": 36520.89352543127,
          "x_hi": 0.75,
          "x_lo": 0.6666666666666666
        },
        {
          "enthalpy": {
            "intercept": -37378.6202514622,
            "slope": 37378.6202514622
          },
          "entropy": {
            "intercept": -0.6642688367749088,
            "slope": 0.6642688367749088
          },
          "intercept": -37180.56849777777,
          "kind": "two_phase",
          "left": {
            "phase": "COSN3",
            "x": 0.75
          },
          "mu_a_rel": -37180.56849777777,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "BCT_A5",
            "x": 1.0
          },
          "slope": 37180.56849777777,
          "x_hi": 1.0,
          "x_lo": 0.75
        }
      ],
      "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": "HCP_A3",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -12868.139686827466,
          "energy_per_atom": -12868.139686827466,
          "enthalpy": -13481.095886505744,
          "entries_at_x": 1,
          "entropy": -2.0558651674602686,
          "formula": "",
          "nsites": null,
          "phase": "CO3SN2_B82",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.4000567580257212
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -12868.625538141772,
          "energy_per_atom": -12868.625538141772,
          "enthalpy": -13480.744348013655,
          "entries_at_x": 1,
          "entropy": -2.053056548287394,
          "formula": "",
          "nsites": null,
          "phase": "CO3SN2_B82",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.4000722360088638
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -15933.79822357228,
          "energy_per_atom": -15933.79822357228,
          "enthalpy": -16639.310163152928,
          "entries_at_x": 1,
          "entropy": -2.366298640216847,
          "formula": "",
          "nsites": null,
          "phase": "COSN_B35",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -12338.549918230383,
          "energy_per_atom": -12338.549918230383,
          "enthalpy": -12859.540096294673,
          "entries_at_x": 1,
          "entropy": -1.7474096195347784,
          "formula": "",
          "nsites": null,
          "phase": "COSN2_C16",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6666666666666666
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -9295.142124444443,
          "energy_per_atom": -9295.142124444443,
          "enthalpy": -9344.65506286555,
          "entries_at_x": 1,
          "entropy": -0.1660672091937272,
          "formula": "",
          "nsites": null,
          "phase": "COSN3",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.75
        },
        {
          "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": "CoSn-09Don",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:26:33Z",
    "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/CoSn-09Don.tdb",
    "source_sha256": "df75c146f15affdedc443ed8e0d8b7efa0336059081a52f8e66a16f06f0d74da"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "CO-SN",
  "x_element": "SN"
}
