{
  "counts": {
    "above_hull": 0,
    "entries": 9,
    "intervals": 8,
    "vertices": 9
  },
  "elements": [
    "SI",
    "Y"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "SI": {
          "energy": -5608.211842349094,
          "phase": "DIAMOND_A4"
        },
        "Y": {
          "energy": -13353.412849547396,
          "phase": "HCP_A3"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -183884.30473091325
          },
          "entropy": {
            "intercept": 0.0,
            "slope": 5.275116088039132
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "DIAMOND_A4",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -185457.08059256212,
          "right": {
            "phase": "SI2Y_C32",
            "x": 0.33319933662430434
          },
          "slope": -185457.08059256212,
          "x_hi": 0.33319933662430434,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -61270.12835196172,
                -26.017476882422443,
                0.002631138152338508,
                6.819893485499051e-07
              ]
            ],
            "knots": [
              0.33319933662430434,
              0.33333236188659365
            ],
            "max_abs_error": 9.59626049734652e-08
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -3.533835498501918,
                -0.005285080416998336,
                0.0019129968792815973,
                -0.002979221774676138
              ]
            ],
            "knots": [
              0.33319933662430434,
              0.33333236188659365
            ],
            "max_abs_error": 0.00030154629506107256
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -60216.51529808338,
              -24.44173015409017,
              -0.5677288826247171,
              0.8882556533482351
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.33319933662430434,
            0.33333236188659365
          ],
          "max_abs_error": 0.08990612258639885,
          "phase": "SI2Y_C32",
          "x_hi": 0.33333236188659365,
          "x_lo": 0.33319933662430434
        },
        {
          "enthalpy": {
            "intercept": 5604.955064907546,
            "slope": -200703.87970518338
          },
          "entropy": {
            "intercept": 32.497921336163174,
            "slope": -92.23779025342
          },
          "intercept": -4084.3001814696254,
          "kind": "two_phase",
          "left": {
            "phase": "SI2Y_C32",
            "x": 0.33333236188659365
          },
          "mu_a_rel": -4084.3001814696254,
          "mu_b_rel": -177287.48272259548,
          "right": {
            "phase": "SI5Y3_RT",
            "x": 0.375
          },
          "slope": -173203.18254112586,
          "x_hi": 0.375,
          "x_lo": 0.33333236188659365
        },
        {
          "enthalpy": {
            "intercept": -37343.41981583096,
            "slope": -86174.88002321403
          },
          "entropy": {
            "intercept": -4.585000031298293,
            "slope": 6.650000059810566
          },
          "intercept": -35976.40205649937,
          "kind": "two_phase",
          "left": {
            "phase": "SI5Y3_RT",
            "x": 0.375
          },
          "mu_a_rel": -35976.40205649937,
          "mu_b_rel": -124133.97959754591,
          "right": {
            "phase": "SIY_B33",
            "x": 0.5
          },
          "slope": -88157.57754104654,
          "x_hi": 0.5,
          "x_lo": 0.375
        },
        {
          "enthalpy": {
            "intercept": -105338.79981583117,
            "slope": 49815.87997678639
          },
          "entropy": {
            "intercept": -9.410000031298328,
            "slope": 16.300000059810635
          },
          "intercept": -102533.2083064995,
          "kind": "two_phase",
          "left": {
            "phase": "SIY_B33",
            "x": 0.5
          },
          "mu_a_rel": -102533.2083064995,
          "mu_b_rel": -57577.17334754578,
          "right": {
            "phase": "SI4Y5",
            "x": 0.5555555555555556
          },
          "slope": 44956.034958953715,
          "x_hi": 0.5555555555555556,
          "x_lo": 0.5
        },
        {
          "enthalpy": {
            "intercept": -114537.07981583223,
            "slope": 66372.7839767883
          },
          "entropy": {
            "intercept": 0.08999996869243687,
            "slope": -0.79999994017274
          },
          "intercept": -114563.9133064979,
          "kind": "two_phase",
          "left": {
            "phase": "SI4Y5",
            "x": 0.5555555555555556
          },
          "mu_a_rel": -114563.9133064979,
          "mu_b_rel": -47952.60934754707,
          "right": {
            "phase": "SI3Y5_D88",
            "x": 0.6250000000000014
          },
          "slope": 66611.30395895083,
          "x_hi": 0.6250000000000014,
          "x_lo": 0.5555555555555556
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -73054.08983033945,
                2209.736457253241,
                65.08485583096581,
                -0.00014286258328866097
              ]
            ],
            "knots": [
              0.6250000000000014,
              0.6370761430833289
            ],
            "max_abs_error": 3.2216557883657515e-05
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -5.910542807124472,
                0.07447475936448798,
                -0.056897527889819194,
                0.022167799026628496
              ],
              [
                -5.8707977766231725,
                0.02720867268312688,
                -0.005648454031522476,
                0.0009240904704430619
              ],
              [
                -5.848313467501126,
                0.018687124414567838,
                -0.0029523019872133988,
                0.0003202955479818387
              ],
              [
                -5.832258349525791,
                0.013744279772036504,
                -0.0019776707512534266,
                0.00016173354172509778
              ],
              [
                -5.820330006963284,
                0.010274510089136157,
                -0.0014769097870228612,
                9.742193191186656e-05
              ],
              [
                -5.8114349847292575,
                0.0076131526651183005,
                -0.0011725490224417249,
                6.509071075160109e-05
              ],
              [
                -5.804929290375829,
                0.005463440339962489,
                -0.0009681097951101942,
                4.6544337443776406e-05
              ],
              [
                -5.800387415493534,
                0.0036669504542409543,
                -0.0008214303638845316,
                3.494682366360358e-05
              ]
            ],
            "knots": [
              0.6250000000000014,
              0.6265095044261071,
              0.6280190241110026,
              0.6295285437958981,
              0.6310380634807935,
              0.632547583165689,
              0.6340571028505845,
              0.63556662253548,
              0.6370761430833289
            ],
            "max_abs_error": 0.001591313928419602
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -71291.86149239528,
              254.00994481864552,
              17.98092528808104,
              -6.6093340574885815
            ],
            [
              -71026.47995634604,
              270.1389274771209,
              2.701213218824705,
              -0.27560933376662433
            ],
            [
              -70753.91542498386,
              274.71360511150283,
              1.8970372382523237,
              -0.09536005709969686
            ],
            [
              -70477.40014269117,
              278.22110571023364,
              1.6068110560645437,
              -0.048335807432522415
            ],
            [
              -70197.62056173228,
              281.28952441964066,
              1.4575537304917816,
              -0.02918515747296624
            ],
            [
              -69914.90266873964,
              284.1170178652765,
              1.3665468361206763,
              -0.01940679479520213
            ],
            [
              -69629.43851083302,
              286.791857286822,
              1.3055787442135056,
              -0.013880930811808412
            ],
            [
              -69341.35495573281,
              289.36169701780835,
              1.2615900838558787,
              -0.010294767764605695
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.6250000000000014,
            0.6265095044261071,
            0.6280190241110026,
            0.6295285437958981,
            0.6310380634807935,
            0.632547583165689,
            0.6340571028505845,
            0.63556662253548,
            0.6370761430833289
          ],
          "max_abs_error": 0.4744332042464521,
          "phase": "SI3Y5_D88",
          "x_hi": 0.6370761430833289,
          "x_lo": 0.6250000000000014
        },
        {
          "enthalpy": {
            "intercept": -195025.11976325957,
            "slope": 195025.11976325957
          },
          "entropy": {
            "intercept": -0.9667388476419555,
            "slope": 0.9667388476419555
          },
          "intercept": -194736.88657583512,
          "kind": "two_phase",
          "left": {
            "phase": "SI3Y5_D88",
            "x": 0.6370761430833289
          },
          "mu_a_rel": -194736.88657583512,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "HCP_A3",
            "x": 1.0
          },
          "slope": 194736.88657583512,
          "x_hi": 1.0,
          "x_lo": 0.6370761430833289
        }
      ],
      "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": "DIAMOND_A4",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -61794.17622572185,
          "energy_per_atom": -61794.17622572185,
          "enthalpy": -61270.12835196172,
          "entries_at_x": 1,
          "entropy": 1.7576651811508341,
          "formula": "",
          "nsites": null,
          "phase": "SI2Y_C32",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.33319933662430434
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -61818.52610417793,
          "energy_per_atom": -61818.52610417793,
          "enthalpy": -61296.143197024,
          "entries_at_x": 1,
          "entropy": 1.752080855790453,
          "formula": "",
          "nsites": null,
          "phase": "SI2Y_C32",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.33333236188659365
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -69035.49363439182,
          "energy_per_atom": -69035.49363439182,
          "enthalpy": -69658.99982453622,
          "entries_at_x": 1,
          "entropy": -2.0912500088693307,
          "formula": "",
          "nsites": null,
          "phase": "SI5Y3_RT",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.375
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -80055.19082702264,
          "energy_per_atom": -80055.19082702264,
          "enthalpy": -80430.85982743798,
          "entries_at_x": 1,
          "entropy": -1.26000000139301,
          "formula": "",
          "nsites": null,
          "phase": "SIY_B33",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -77557.63332930299,
          "energy_per_atom": -77557.63332930299,
          "enthalpy": -77663.31093983873,
          "entries_at_x": 1,
          "entropy": -0.3544444425146409,
          "formula": "",
          "nsites": null,
          "phase": "SI4Y5",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5555555555555556
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -72931.84833215353,
          "energy_per_atom": -72931.84833215353,
          "enthalpy": -73054.08983033945,
          "entries_at_x": 1,
          "entropy": -0.4099999939155268,
          "formula": "",
          "nsites": null,
          "phase": "SI3Y5_D88",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6250000000000014
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -70674.66196004639,
          "energy_per_atom": -70674.66196004639,
          "enthalpy": -70779.26866011786,
          "entries_at_x": 1,
          "entropy": -0.35085259121739654,
          "formula": "",
          "nsites": null,
          "phase": "SI3Y5_D88",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6370761430833289
        },
        {
          "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": 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": "SiY-19Zha",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T01:01:39Z",
    "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/SiY-19Zha.tdb",
    "source_sha256": "228f328ec4446fa33c332d33c86f71cc45e46c70d9992151a21ae5e103bc6ed4"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "SI-Y",
  "x_element": "Y"
}