{
  "counts": {
    "above_hull": 0,
    "entries": 12,
    "intervals": 11,
    "vertices": 12
  },
  "elements": [
    "GE",
    "NB"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "GE": {
          "energy": -9269.484127408536,
          "phase": "DIAMOND_A4"
        },
        "NB": {
          "energy": -10813.900547614925,
          "phase": "BCC_A2"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -3.5949207238797567,
                -0.015308421460130006,
                0.007695249813528537
              ]
            ],
            "knots": [
              0.0,
              4.3936341246209784e-05
            ],
            "max_abs_error": 0.0011038893079988732
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                6.989933610114698e-05,
                3.541731607702477e-05,
                -1.7617507341947036e-05
              ]
            ],
            "knots": [
              0.0,
              4.3936341246209784e-05
            ],
            "max_abs_error": 2.5274462021589866e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -3.615761211169286,
              -0.02586809372251908,
              0.012947909328605789
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            4.3936341246209784e-05
          ],
          "max_abs_error": 0.0018574473654382473,
          "phase": "DIAMOND_A4",
          "x_hi": 4.3936341246209784e-05,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 0.6243482344310571,
            "slope": -96204.6909247832
          },
          "entropy": {
            "intercept": 0.0024594823483844886,
            "slope": 37.749096075998786
          },
          "intercept": -0.10894642774369778,
          "kind": "two_phase",
          "left": {
            "phase": "DIAMOND_A4",
            "x": 4.3936341246209784e-05
          },
          "mu_a_rel": -0.10894642774369778,
          "mu_b_rel": -107459.69286626998,
          "right": {
            "phase": "GE2NB_C40",
            "x": 0.3283004678319938
          },
          "slope": -107459.58391984223,
          "x_hi": 0.3283004678319938,
          "x_lo": 4.3936341246209784e-05
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -31583.42069000426,
                -142.55964854365416,
                0.3794773709751098,
                -3.356035449542105e-10
              ],
              [
                -31725.600861177263,
                -141.8017595438973,
                0.37948307387313207,
                4.623075255949516e-10
              ],
              [
                -31867.023137646836,
                -141.04279339511012,
                0.37948307497896394,
                -3.9619862945983186e-11
              ],
              [
                -32007.686447967,
                -52.6064352170801,
                0.053364806941701204,
                2.529830567254976e-09
              ],
              [
                -32060.23951837461,
                -42.84072215930731,
                24.52174885657413,
                -11.16712418557844
              ],
              [
                -32089.72561586291,
                -43.67775520492032,
                0.40221252962749077,
                -1.91562321560923e-10
              ],
              [
                -32133.001158538395,
                -42.87333014597564,
                0.40221252938814445,
                -3.147704319417244e-12
              ],
              [
                -32175.472276154982,
                -42.068921354934396,
                0.4022450650669924,
                -1.6267804923586482e-05
              ],
              [
                -32217.13896871266,
                -41.264815517958276,
                0.4021620965639272,
                3.4600963033426524e-05
              ]
            ],
            "knots": [
              0.3283004678319938,
              0.3297823752504344,
              0.3312642938065516,
              0.3327462123626687,
              0.33330193182121265,
              0.3342281309187859,
              0.335710049474903,
              0.33719196803102014,
              0.3386738865871373,
              0.3401558180501807
            ],
            "max_abs_error": 0.8771268450836942
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                7.13271232951458,
                0.18859617916151045,
                -0.010064836138144306,
                -0.046695191298984404
              ],
              [
                7.264548481238964,
                0.02885985490282598,
                -0.0942232831039439,
                0.031223201279063972
              ]
            ],
            "knots": [
              0.3283004678319938,
              0.3342281309187859,
              0.3401558180501807
            ],
            "max_abs_error": 0.0033338866357075503
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -33710.03887104903,
              -156.61705700892526,
              0.8699098006425174,
              0.06947941250587064
            ],
            [
              -33865.71653884478,
              -154.67048598934232,
              1.0755210101411024,
              0.16550348215284316
            ],
            [
              -34019.14600034184,
              -152.02561284582455,
              1.3322775298839815,
              0.8535310414916921
            ],
            [
              -34168.9858046163,
              -55.1046534273909,
              0.668376648240816,
              0.6134341862973756
            ],
            [
              -34222.80864720916,
              -48.95788316754148,
              28.01022318715096,
              -11.894438354772692
            ],
            [
              -34255.65074554431,
              -45.82889195578517,
              2.926293842372978,
              -0.5269366140368206
            ],
            [
              -34299.08028027175,
              -41.55887480368567,
              1.4458662108547387,
              -0.1335152579733503
            ],
            [
              -34339.32680412255,
              -39.068113311180795,
              1.0443669095276675,
              -0.06038421101598601
            ],
            [
              -34377.41093473522,
              -37.16098520384387,
              0.8584079696839808,
              -0.034296588298389
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.3283004678319938,
            0.3297823752504344,
            0.3312642938065516,
            0.3327462123626687,
            0.33330193182121265,
            0.3342281309187859,
            0.335710049474903,
            0.33719196803102014,
            0.3386738865871373,
            0.3401558180501807
          ],
          "max_abs_error": 0.8336270340005285,
          "phase": "GE2NB_C40",
          "x_hi": 0.3401558180501807,
          "x_lo": 0.3283004678319938
        },
        {
          "enthalpy": {
            "intercept": -22982.533468087124,
            "slope": -27268.29184523202
          },
          "entropy": {
            "intercept": 14.430036017405198,
            "slope": -5.4942566597787375
          },
          "intercept": -27284.848706676494,
          "kind": "two_phase",
          "left": {
            "phase": "GE2NB_C40",
            "x": 0.3401558180501807
          },
          "mu_a_rel": -27284.848706676494,
          "mu_b_rel": -52915.02792879547,
          "right": {
            "phase": "GE2NB3_D88",
            "x": 0.5738655551996253
          },
          "slope": -25630.179222118975,
          "x_hi": 0.5738655551996253,
          "x_lo": 0.3401558180501807
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -38630.866907196614,
                -224.57307016845937,
                35.156423108332206,
                -1.6008243619580753e-09
              ]
            ],
            "knots": [
              0.5738655551996253,
              0.58155103313411
            ],
            "max_abs_error": 3.6518031265586615e-08
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                5.604987398480353,
                -0.0735276201370124,
                -0.02171709903594672,
                -4.238648951424007e-06
              ]
            ],
            "knots": [
              0.5738655551996253,
              0.58155103313411
            ],
            "max_abs_error": 4.4734655979539184e-08
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -40301.99390005353,
              -202.6508102238098,
              41.63137618186204,
              0.00126375483330321
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.5738655551996253,
            0.58155103313411
          ],
          "max_abs_error": 1.3337434211280197e-05,
          "phase": "GE2NB3_D88",
          "x_hi": 0.58155103313411,
          "x_lo": 0.5738655551996253
        },
        {
          "enthalpy": {
            "intercept": -24465.6956758831,
            "slope": -24683.28153595587
          },
          "entropy": {
            "intercept": 30.599759482180165,
            "slope": -33.42434470276837
          },
          "intercept": -33589.01396549484,
          "kind": "two_phase",
          "left": {
            "phase": "GE2NB3_D88",
            "x": 0.58155103313411
          },
          "mu_a_rel": -33589.01396549484,
          "mu_b_rel": -48306.82712832078,
          "right": {
            "phase": "GE3NB5_D8M",
            "x": 0.6165296530294805
          },
          "slope": -14717.813162825936,
          "x_hi": 0.6165296530294805,
          "x_lo": 0.58155103313411
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -39683.67067687496,
                -278.0677840654406,
                157.75883558154544,
                -0.0002598388304022592
              ]
            ],
            "knots": [
              0.6165296530294805,
              0.6249999999999656
            ],
            "max_abs_error": 3.7275625800248235e-05
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                4.457410284174193,
                -0.06013289848182302,
                -0.0005276988999091889,
                -2.4389150508320745e-05
              ],
              [
                4.396725297641953,
                -0.061262005504370234,
                -0.0006058204041837489,
                -3.253736346145453e-05
              ],
              [
                4.334824934369935,
                -0.06257117872099437,
                -0.0007098420620564871,
                -4.554752423724384e-05
              ],
              [
                4.271498366062646,
                -0.06412736768320322,
                -0.0008549308289659691,
                -6.824083840790973e-05
              ],
              [
                4.206447826712071,
                -0.06604168266612373,
                -0.0010705053408981008,
                -0.00011334925589094602
              ],
              [
                4.139222289449156,
                -0.06852210207938375,
                -0.0014201798313631525,
                -0.00022453626276371097
              ],
              [
                4.069055471275644,
                -0.07203390437512304,
                -0.0020403849186703266,
                -0.0006480571662272755
              ],
              [
                3.9943331248156246,
                -0.07804222018507623,
                0.006712811671482549,
                -0.015546580609137522
              ]
            ],
            "knots": [
              0.6165296530294805,
              0.6175884355417042,
              0.6186472282844884,
              0.6197060210272727,
              0.6207648137700569,
              0.6218236065128411,
              0.6228823992556254,
              0.6239411919984096,
              0.6249999999999656
            ],
            "max_abs_error": 0.001115899206758808
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -41012.6475531015,
              -16.829492839406292,
              2.622260654595779,
              0.0072716250401168026
            ],
            [
              -41026.84751366128,
              -11.563283343789056,
              2.6456002165524835,
              0.009701014625389526
            ],
            [
              -41035.755495773905,
              -6.243003623613604,
              2.676614273134502,
              0.013579994368600468
            ],
            [
              -41039.30830513001,
              -0.8490761595313019,
              2.7198724891030777,
              0.020346006046669807
            ],
            [
              -41037.41716279439,
              4.651626578041395,
              2.7841460294224216,
              0.03379508095501116
            ],
            [
              -41029.947595105965,
              10.321113351082937,
              2.8884014791386328,
              0.06694548687817203
            ],
            [
              -41016.671134788856,
              16.29810693034018,
              3.073315627006245,
              0.1932182435493317
            ],
            [
              -40997.10649398795,
              23.019432428249242,
              0.46364598848495575,
              4.635185366693889
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.6165296530294805,
            0.6175884355417042,
            0.6186472282844884,
            0.6197060210272727,
            0.6207648137700569,
            0.6218236065128411,
            0.6228823992556254,
            0.6239411919984096,
            0.6249999999999656
          ],
          "max_abs_error": 0.33270237927354174,
          "phase": "GE3NB5_D8M",
          "x_hi": 0.6249999999999656,
          "x_lo": 0.6165296530294805
        },
        {
          "enthalpy": {
            "intercept": -88609.01292496212,
            "slope": 78088.05286362742
          },
          "entropy": {
            "intercept": 29.19936476787174,
            "slope": -31.666183710353344
          },
          "intercept": -97314.8035305031,
          "kind": "two_phase",
          "left": {
            "phase": "GE3NB5_D8M",
            "x": 0.6249999999999656
          },
          "mu_a_rel": -97314.8035305031,
          "mu_b_rel": -9785.477993633816,
          "right": {
            "phase": "GENB3_A15",
            "x": 0.8015382611133489
          },
          "slope": 87529.32553686928,
          "x_hi": 0.8015382611133489,
          "x_lo": 0.6249999999999656
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -26018.450818922942,
                954.0189832489812,
                370.92194800393395,
                -10.681744329888033
              ]
            ],
            "knots": [
              0.8015382611133489,
              0.8139014632388466
            ],
            "max_abs_error": 0.0005064160577603616
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -0.3250782560127874,
                -0.28624973932161973,
                0.16559318114945346,
                -0.008243918068518246
              ]
            ],
            "knots": [
              0.8015382611133489,
              0.8139014632388466
            ],
            "max_abs_error": 5.329666996900517e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -25921.528736892735,
              1039.3643430279174,
              321.55034104264996,
              -8.223820156385045
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.8015382611133489,
            0.8139014632388466
          ],
          "max_abs_error": 0.001627785499294987,
          "phase": "GENB3_A15",
          "x_hi": 0.8139014632388466,
          "x_lo": 0.8015382611133489
        },
        {
          "enthalpy": {
            "intercept": -132697.11931561903,
            "slope": 132685.50624527826
          },
          "entropy": {
            "intercept": 17.362390630619615,
            "slope": -16.981338562107545
          },
          "intercept": -137873.71608213827,
          "kind": "two_phase",
          "left": {
            "phase": "GENB3_A15",
            "x": 0.8139014632388466
          },
          "mu_a_rel": -137873.71608213827,
          "mu_b_rel": -125.22374456762918,
          "right": {
            "phase": "BCC_A2",
            "x": 0.9824811402719422
          },
          "slope": 137748.49233757064,
          "x_hi": 0.9824811402719422,
          "x_lo": 0.8139014632388466
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -2336.111842198116,
                2240.1017169332654,
                94.77642924526936,
                1.2336960195816573
              ]
            ],
            "knots": [
              0.9824811402719422,
              1.0
            ],
            "max_abs_error": 0.0013221219312526955
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -0.05494890669164587,
                0.0059977991551828785,
                0.04739608833779867,
                0.0015550191986643258
              ]
            ],
            "knots": [
              0.9824811402719422,
              1.0
            ],
            "max_abs_error": 2.6464583682064835e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -2319.7288256679994,
              2238.3134731149385,
              80.64528550728664,
              0.7700670457743399
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.9824811402719422,
            1.0
          ],
          "max_abs_error": 0.0020171831293964715,
          "phase": "BCC_A2",
          "x_hi": 1.0,
          "x_lo": 0.9824811402719422
        }
      ],
      "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": -4.830327377021604,
          "energy_per_atom": -4.830327377021604,
          "enthalpy": -3.602533895526359,
          "entries_at_x": 1,
          "entropy": 0.00411803951531553,
          "formula": "",
          "nsites": null,
          "phase": "DIAMOND_A4",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 4.3936341246209784e-05
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -35279.14062034334,
          "energy_per_atom": -35279.14062034334,
          "enthalpy": -31583.42069000426,
          "entries_at_x": 1,
          "entropy": 12.395505384333667,
          "formula": "",
          "nsites": null,
          "phase": "GE2NB_C40",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.3283004678319938
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -36003.103286749116,
          "energy_per_atom": -36003.103286749116,
          "enthalpy": -32258.001587533094,
          "entries_at_x": 1,
          "entropy": 12.561132648720509,
          "formula": "",
          "nsites": null,
          "phase": "GE2NB_C40",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.3401558180501807
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -41993.1257358437,
          "energy_per_atom": -41993.1257358437,
          "enthalpy": -38630.866907196614,
          "entries_at_x": 1,
          "entropy": 11.277071368932035,
          "formula": "",
          "nsites": null,
          "phase": "GE2NB3_D88",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5738655551996253
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -42148.17341581107,
          "energy_per_atom": -42148.17341581107,
          "enthalpy": -38820.28355425834,
          "entries_at_x": 1,
          "entropy": 11.1617972884546,
          "formula": "",
          "nsites": null,
          "phase": "GE2NB3_D88",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.58155103313411
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -42662.98220812464,
          "energy_per_atom": -42662.98220812464,
          "enthalpy": -39683.67067687496,
          "entries_at_x": 1,
          "entropy": 9.992659839844627,
          "formula": "",
          "nsites": null,
          "phase": "GE3NB5_D8M",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6165296530294805
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -42608.97506996281,
          "energy_per_atom": -42608.97506996281,
          "enthalpy": -39803.97988519768,
          "entries_at_x": 1,
          "entropy": 9.407999948901988,
          "formula": "",
          "nsites": null,
          "phase": "GE3NB5_D8M",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6249999999999656
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -27156.700143256654,
          "energy_per_atom": -27156.700143256654,
          "enthalpy": -26018.450818922942,
          "entries_at_x": 1,
          "entropy": 3.8177069405792636,
          "formula": "",
          "nsites": null,
          "phase": "GENB3_A15",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.8015382611133489
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -25760.01660964447,
          "energy_per_atom": -25760.01660964447,
          "enthalpy": -24704.191631999918,
          "entries_at_x": 1,
          "entropy": 3.5412543271660297,
          "formula": "",
          "nsites": null,
          "phase": "GENB3_A15",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.8139014632388466
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -2538.420259580964,
          "energy_per_atom": -2538.420259580964,
          "enthalpy": -2336.111842198116,
          "entries_at_x": 1,
          "entropy": 0.6785457567762876,
          "formula": "",
          "nsites": null,
          "phase": "BCC_A2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.9824811402719422
        },
        {
          "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": "BCC_A2",
          "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": "GeNb-11Gen",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:41:12Z",
    "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/GeNb-11Gen.tdb",
    "source_sha256": "55314e2cadc330d9cc399b689b0ed38dcc38c3845fdb8918c4599b9f0d9481e5"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "GE-NB",
  "x_element": "NB"
}