{
  "counts": {
    "above_hull": 0,
    "entries": 10,
    "intervals": 9,
    "vertices": 10
  },
  "elements": [
    "CU",
    "ZN"
  ],
  "flags": [
    "has_intermediate_phases",
    "redundant_phase_descriptions",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "CU": {
          "energy": -9883.67159484096,
          "phase": "FCC_A1"
        },
        "ZN": {
          "energy": -12411.984260070496,
          "phase": "HCP_A3"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -4025.0641215993073,
                -216.1949213320604,
                203.23963234371877
              ],
              [
                -4038.019410587648,
                -3847.728732937308,
                395.5449024851782,
                140.5668257603852
              ]
            ],
            "knots": [
              0.0,
              0.1444409890337976,
              0.2888819656097999
            ],
            "max_abs_error": 0.9686096142552287
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                -0.0012021354658002781,
                -0.5344259799784016,
                0.12914177444088948
              ],
              [
                -0.4064863410033124,
                -0.6826254423986192,
                -0.14570706218750462,
                0.09172054564011611
              ]
            ],
            "knots": [
              0.0,
              0.1444409890337976,
              0.2888819656097999
            ],
            "max_abs_error": 0.000578695245464958
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -4024.705704910362,
              -56.855815401043856,
              164.7360122938926
            ],
            [
              -3916.825508017513,
              -3644.203957286243,
              438.9874630766499,
              113.22034507760509
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.1444409890337976,
            0.2888819656097999
          ],
          "max_abs_error": 0.7960953249985323,
          "phase": "FCC_A1",
          "x_hi": 0.2888819656097999,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 82.56726378050462,
            "slope": -25727.475453067087
          },
          "entropy": {
            "intercept": 10.34284308374888,
            "slope": -22.458038640275134
          },
          "intercept": -3001.1514016392257,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.2888819656097999
          },
          "mu_a_rel": -3001.1514016392257,
          "mu_b_rel": -22032.76263410828,
          "right": {
            "phase": "B2_BCC",
            "x": 0.435744309329843
          },
          "slope": -19031.611232469055,
          "x_hi": 0.435744309329843,
          "x_lo": 0.2888819656097999
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -11128.033758316702,
                -374.3788457897066,
                13.65892702276642,
                0.1964470629322932
              ],
              [
                -11488.557230020713,
                -346.4726376238806,
                14.251590376470062,
                0.3468908218734441
              ],
              [
                -11820.431386446251,
                -316.93342582411054,
                15.048896071263641,
                1.3383202190134966
              ],
              [
                -12120.977595980079,
                -282.87248328407424,
                11.810760398330302,
                16.97298801664104
              ],
              [
                -12375.06633084919,
                -104.78092799368824,
                26.033770903999542,
                8.914251848487762
              ],
              [
                -12444.89923609039,
                -24.055463497192804,
                46.66786323125843,
                -9.360113914030713
              ],
              [
                -12431.64695027035,
                81.3365129569932,
                50.504462899815934,
                -12.254775040303883
              ],
              [
                -12312.060749453847,
                145.5423062126034,
                18.749073686319264,
                -1.033121960867959
              ],
              [
                -12148.802491515793,
                179.9374275390295,
                15.845945215001024,
                -0.23292432520892703
              ]
            ],
            "knots": [
              0.435744309329843,
              0.4501832743241776,
              0.46462224737698843,
              0.4790612204297992,
              0.49350019348261,
              0.5007196800090155,
              0.5079391665354208,
              0.5223781395882316,
              0.5368171126410424,
              0.5512560983896594
            ],
            "max_abs_error": 0.6701043108059821
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -5.137418129871396,
                -0.36498511513426474,
                -0.0029829464776523484,
                -0.000811543640813539
              ],
              [
                -5.506197735124128,
                -0.37338340961897454,
                -0.005621756520344134,
                -0.0011737534304009367
              ],
              [
                -5.886376654693847,
                -0.38814974937104124,
                -0.010051473672430089,
                -0.0003428230920227149
              ],
              [
                -6.28492070082934,
                -0.4093985696826788,
                -0.03375216134943437,
                0.041191592401986
              ],
              [
                -6.686879839459467,
                -0.17865451257363496,
                0.052945836812224194,
                0.027435522374073436
              ],
              [
                -6.785152992846807,
                0.015499308732240709,
                0.1160565737327531,
                -0.028454697971269066
              ],
              [
                -6.682051808353083,
                0.3211319903722913,
                0.05638336421275536,
                -0.027649381495563397
              ],
              [
                -6.332185835263598,
                0.3508683007211372,
                -0.0110964170456469,
                0.000742395670862761
              ],
              [
                -5.991671555917246,
                0.33090263059322667,
                -0.008127167133620383,
                0.0012156144476783703
              ]
            ],
            "knots": [
              0.435744309329843,
              0.4501832743241776,
              0.46462224737698843,
              0.4790612204297992,
              0.49350019348261,
              0.5007196800090155,
              0.5079391665354208,
              0.5223781395882316,
              0.5368171126410424,
              0.5512560983896594
            ],
            "max_abs_error": 0.0019524287833156961
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -9596.312542895548,
              -265.5585337123881,
              14.5482925150541,
              0.43840879942533206
            ],
            [
              -9846.884375293459,
              -235.14837404591347,
              15.927717082913944,
              0.6968454071736119
            ],
            [
              -10065.408186849285,
              -201.20657804918255,
              18.045742946893654,
              1.4405329237576439
            ],
            [
              -10247.128489027817,
              -160.81029973314023,
              21.8739673045022,
              4.691714742104324
            ],
            [
              -10381.373106714347,
              -103.03017013971031,
              46.3489055763456,
              -1.3388323321668185
            ],
            [
              -10439.393203609881,
              -14.408989972478482,
              33.69376285963549,
              -4.01111194727887
            ],
            [
              -10424.119542670003,
              40.93092235265415,
              22.0574704283585,
              -1.2544672300768411
            ],
            [
              -10362.385617119067,
              81.27880822755043,
              18.269060096027488,
              -0.5953597728082514
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.435744309329843,
            0.4501832743241776,
            0.46462224737698843,
            0.4790612204297992,
            0.49350019348261,
            0.5079391665354208,
            0.5223781395882316,
            0.5368171126410424,
            0.5512560983896594
          ],
          "max_abs_error": 0.4375518414799444,
          "phase": "B2_BCC",
          "x_hi": 0.5512560983896594,
          "x_lo": 0.435744309329843
        },
        {
          "enthalpy": {
            "intercept": -24720.834857942296,
            "slope": 23160.891738254242
          },
          "entropy": {
            "intercept": -26.972134100077888,
            "slope": 49.022289052481945
          },
          "intercept": -16679.093076004065,
          "kind": "two_phase",
          "left": {
            "phase": "B2_BCC",
            "x": 0.5512560983896594
          },
          "mu_a_rel": -16679.093076004065,
          "mu_b_rel": -8134.196818747325,
          "right": {
            "phase": "CU5ZN8_D82",
            "x": 0.6149819772188062
          },
          "slope": 8544.89625725674,
          "x_hi": 0.6149819772188062,
          "x_lo": 0.5512560983896594
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -10477.303862599989,
                665.916441527916,
                878.5318809372475,
                -2.5001759255064826
              ]
            ],
            "knots": [
              0.6149819772188062,
              0.6958218509715491
            ],
            "max_abs_error": 0.45596282363658247
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -2.3656276469599478,
                0.23143862627050518,
                0.2524795615966611,
                -0.02606416142149226
              ]
            ],
            "knots": [
              0.6149819772188062,
              0.6958218509715491
            ],
            "max_abs_error": 0.00031907582573431625
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -9771.991979658878,
              596.9130151045745,
              803.2550996497171,
              5.270853800584973
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.6149819772188062,
            0.6958218509715491
          ],
          "max_abs_error": 0.36083036621312203,
          "phase": "CU5ZN8_D82",
          "x_hi": 0.6958218509715491,
          "x_lo": 0.6149819772188062
        },
        {
          "enthalpy": {
            "intercept": -30040.809119515263,
            "slope": 30331.691041300593
          },
          "entropy": {
            "intercept": 1.2674730799504763,
            "slope": 2.7777963003696384
          },
          "intercept": -30418.706218302537,
          "kind": "two_phase",
          "left": {
            "phase": "CU5ZN8_D82",
            "x": 0.6958218509715491
          },
          "mu_a_rel": -30418.706218302537,
          "mu_b_rel": -915.2151439571062,
          "right": {
            "phase": "HCP_IM_A3",
            "x": 0.8141115107375366
          },
          "slope": 29503.49107434543,
          "x_hi": 0.8141115107375366,
          "x_lo": 0.6958218509715491
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -5347.430302657833,
                851.2435916244822,
                79.3434913119662,
                1.458741549483534
              ]
            ],
            "knots": [
              0.8141115107375366,
              0.8449930342047376
            ],
            "max_abs_error": 6.854284220025875e-05
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -0.4637458549950524,
                0.1784265632411059,
                0.022886055360631624,
                0.0005963773705488229
              ]
            ],
            "knots": [
              0.8141115107375366,
              0.8449930342047376
            ],
            "max_abs_error": 2.8039861432738178e-08
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -5209.164475991058,
              798.0457117944769,
              72.52001390541295,
              1.280931636901414
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.8141115107375366,
            0.8449930342047376
          ],
          "max_abs_error": 6.018418662279146e-05,
          "phase": "HCP_IM_A3",
          "x_hi": 0.8449930342047376,
          "x_lo": 0.8141115107375366
        },
        {
          "enthalpy": {
            "intercept": -28543.61678043314,
            "slope": 28554.356456878304
          },
          "entropy": {
            "intercept": 21.215669440946062,
            "slope": -21.173553957753114
          },
          "intercept": -34869.06862425123,
          "kind": "two_phase",
          "left": {
            "phase": "HCP_IM_A3",
            "x": 0.8449930342047376
          },
          "mu_a_rel": -34869.06862425123,
          "mu_b_rel": -1.8170548688067356,
          "right": {
            "phase": "HCP_A3",
            "x": 0.9992710326367557
          },
          "slope": 34867.251569382424,
          "x_hi": 0.9992710326367557,
          "x_lo": 0.8449930342047376
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -10.075517490345767,
                10.067862164653093,
                0.008955442666600533,
                -0.0013001169739261798
              ]
            ],
            "knots": [
              0.9992710326367557,
              1.0
            ],
            "max_abs_error": 0.00018651379038292504
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.007707807460568476,
                -0.007702233763212966,
                -2.264298343992912e-05,
                1.706928608441894e-05
              ]
            ],
            "knots": [
              0.9992710326367557,
              1.0
            ],
            "max_abs_error": 2.4521166504900584e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -12.37360028471344,
              12.36428316099245,
              0.015706448433121523,
              -0.006389324712131383
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.9992710326367557,
            1.0
          ],
          "max_abs_error": 0.0009176123488883192,
          "phase": "HCP_A3",
          "x_hi": 1.0,
          "x_lo": 0.9992710326367557
        }
      ],
      "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": -8499.040663196432,
          "energy_per_atom": -8499.040663196432,
          "enthalpy": -7349.636415279392,
          "entries_at_x": 1,
          "entropy": 3.855120737605361,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.2888819656097999
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -11294.067693565536,
          "energy_per_atom": -11294.067693565536,
          "enthalpy": -11128.033758316702,
          "entries_at_x": 1,
          "entropy": 0.5568805475392651,
          "formula": "",
          "nsites": null,
          "phase": "B2_BCC",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.435744309329843
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -11968.666904084312,
          "energy_per_atom": -11968.666904084312,
          "enthalpy": -11953.252043086966,
          "entries_at_x": 1,
          "entropy": 0.051701697123419876,
          "formula": "",
          "nsites": null,
          "phase": "B2_BCC",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5512560983896594
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -11424.135880586738,
          "energy_per_atom": -11424.135880586738,
          "enthalpy": -10477.303862599989,
          "entries_at_x": 1,
          "entropy": 3.175690149209295,
          "formula": "",
          "nsites": null,
          "phase": "CU5ZN8_D82",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6149819772188062
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -9889.532448828919,
          "energy_per_atom": -9889.532448828919,
          "enthalpy": -8935.35571606033,
          "entries_at_x": 1,
          "entropy": 3.2003244432955995,
          "formula": "",
          "nsites": null,
          "phase": "CU5ZN8_D82",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6958218509715491
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -6399.574527735749,
          "energy_per_atom": -6399.574527735749,
          "enthalpy": -5347.430302657833,
          "entries_at_x": 1,
          "entropy": 3.528909022565543,
          "formula": "",
          "nsites": null,
          "phase": "HCP_IM_A3",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.8141115107375366
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -5406.483926258883,
          "energy_per_atom": -5406.483926258883,
          "enthalpy": -4415.384478171902,
          "entries_at_x": 1,
          "entropy": 3.3241638372865268,
          "formula": "",
          "nsites": null,
          "phase": "HCP_IM_A3",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.8449930342047376
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -27.234143308922285,
          "energy_per_atom": -27.234143308922285,
          "enthalpy": -10.075517490345767,
          "entries_at_x": 1,
          "entropy": 0.05755031299204205,
          "formula": "",
          "nsites": null,
          "phase": "HCP_A3",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.9992710326367557
        },
        {
          "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": "CuZn-05Jia",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:32:41Z",
    "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/CuZn-05Jia.tdb",
    "source_sha256": "00e6afc14ff2edb662983d71abb180d545de5bb8da2b30ab4c014c54706d57bb"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "CU-ZN",
  "x_element": "ZN"
}