{
  "counts": {
    "above_hull": 0,
    "entries": 7,
    "intervals": 6,
    "vertices": 7
  },
  "elements": [
    "AL",
    "TA"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "AL": {
          "energy": -8437.646098824262,
          "phase": "FCC_A1"
        },
        "TA": {
          "energy": -12364.820235004292,
          "phase": "BCC_A2"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -130455.99968908294
          },
          "entropy": {
            "intercept": 0.0,
            "slope": -23.000000628529108
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -123598.54950168703,
          "right": {
            "phase": "AL3TA_D022",
            "x": 0.25
          },
          "slope": -123598.54950168703,
          "x_hi": 0.25,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": -35303.99991599999,
            "slope": 10759.999974917031
          },
          "entropy": {
            "intercept": -7.333333495423249,
            "slope": 6.333333353163889
          },
          "intercept": -33117.56653433957,
          "kind": "two_phase",
          "left": {
            "phase": "AL3TA_D022",
            "x": 0.25
          },
          "mu_a_rel": -33117.56653433957,
          "mu_b_rel": -24245.84989866831,
          "right": {
            "phase": "AL3TA2_L",
            "x": 0.4
          },
          "slope": 8871.716635671253,
          "x_hi": 0.4,
          "x_lo": 0.25
        },
        {
          "enthalpy": {
            "intercept": -41301.4864021273,
            "slope": 25753.716190235304
          },
          "entropy": {
            "intercept": -8.344511738255992,
            "slope": 8.861278960245748
          },
          "intercept": -38813.57022736629,
          "kind": "two_phase",
          "left": {
            "phase": "AL3TA2_L",
            "x": 0.4
          },
          "mu_a_rel": -38813.57022736629,
          "mu_b_rel": -15701.844359128227,
          "right": {
            "phase": "SIGMA_D8B",
            "x": 0.614437613037893
          },
          "slope": 23111.725868238063,
          "x_hi": 0.614437613037893,
          "x_lo": 0.4
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -25477.43449934378,
                1435.5221828481635,
                289.5746130532352,
                -54.48015042976476
              ],
              [
                -23806.81785387214,
                1851.2326494343686,
                125.41423488141118,
                -69.8289859344568
              ]
            ],
            "knots": [
              0.614437613037893,
              0.6738854703130708,
              0.7333333331557963
            ],
            "max_abs_error": 0.2376860796721303
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -8.443240823044572,
                0.10915756445952812,
                0.0034455205442477516,
                -0.0003103908965983587
              ],
              [
                -8.330948128937397,
                0.11512062917358112,
                0.0024579738010262198,
                -0.0004216727098169948
              ],
              [
                -8.213791198672604,
                0.11877519220335753,
                0.0011146597023038024,
                -0.0005998429937515565
              ],
              [
                -8.094501189760694,
                0.11920689009563469,
                -0.0007954362421978833,
                -0.0009157580684374944
              ],
              [
                -7.977005493975699,
                0.11487251426477282,
                -0.00368635954565176,
                -0.0015456078991962358
              ],
              [
                -7.867364947155774,
                0.102871903149936,
                -0.008448938317940968,
                -0.003102469353687798
              ],
              [
                -7.776044451677467,
                0.07669698700185648,
                -0.01699648700497223,
                -0.009042874032040425
              ],
              [
                -7.725386825712622,
                0.009890321731793723,
                -0.017704414500518594,
                -0.0097982805277547
              ],
              [
                -7.742999199009104,
                -0.03071623464606514,
                -0.014642777128581863,
                -0.033324856519817536
              ]
            ],
            "knots": [
              0.614437613037893,
              0.629299569299753,
              0.6441615363041923,
              0.6590235033086316,
              0.6738854703130708,
              0.68874743731751,
              0.7036094043219493,
              0.7184713713263886,
              0.7277601007041631,
              0.7333333331557963
            ],
            "max_abs_error": 0.0009874075570470708
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -22960.082247953043,
              326.33502331287764,
              16.799090631655304,
              -0.6284019015218973
            ],
            [
              -22617.576535910022,
              358.05153064938105,
              14.791327055349086,
              -0.6504949880418849
            ],
            [
              -22245.384173193335,
              385.68634179614884,
              12.710152140933246,
              -0.6501683456646106
            ],
            [
              -21847.637847601916,
              409.1559084869138,
              10.621021100213568,
              -0.6127478285080201
            ],
            [
              -21428.473665843296,
              428.5589625187324,
              8.642879270468882,
              -0.4813569309632726
            ],
            [
              -20991.753180985062,
              444.39830588923274,
              7.04228828716964,
              -0.07369436316889733
            ],
            [
              -20540.386281171828,
              458.2530693054382,
              6.389391970917984,
              1.6409788318679261
            ],
            [
              -20074.102841063603,
              297.4255127856795,
              4.444842061666293,
              2.68048498727336
            ],
            [
              -19769.55200122898,
              187.94855383338364,
              3.7378194971833807,
              9.90047892415808
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.614437613037893,
            0.629299569299753,
            0.6441615363041923,
            0.6590235033086316,
            0.6738854703130708,
            0.68874743731751,
            0.7036094043219493,
            0.7184713713263886,
            0.7277601007041631,
            0.7333333331557963
          ],
          "max_abs_error": 0.29334883114279364,
          "phase": "SIGMA_D8B",
          "x_hi": 0.7333333331557963,
          "x_lo": 0.614437613037893
        },
        {
          "enthalpy": {
            "intercept": -82126.02617680773,
            "slope": 82126.39941258736
          },
          "entropy": {
            "intercept": -11.253809424375993,
            "slope": 11.255194602299477
          },
          "intercept": -78770.70289693004,
          "kind": "two_phase",
          "left": {
            "phase": "SIGMA_D8B",
            "x": 0.7333333331557963
          },
          "mu_a_rel": -78770.70289693004,
          "mu_b_rel": -0.03975501826789696,
          "right": {
            "phase": "BCC_A2",
            "x": 0.999983921293549
          },
          "slope": 78770.66314191178,
          "x_hi": 0.999983921293549,
          "x_lo": 0.7333333331557963
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -0.9472504884137851,
                0.9473096448182744,
                0.005451695142603019,
                -0.005510851547092521
              ]
            ],
            "knots": [
              0.999983921293549,
              1.0
            ],
            "max_abs_error": 0.0007904301636418865
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -0.0004051016479901092,
                0.00040495225160986286,
                -1.315461682818822e-05,
                1.330401320843457e-05
              ]
            ],
            "knots": [
              0.999983921293549,
              1.0
            ],
            "max_abs_error": 1.9082958042097495e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -0.8264694320663879,
              0.8265731309717754,
              0.009373744008930096,
              -0.009477442914317624
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.999983921293549,
            1.0
          ],
          "max_abs_error": 0.001359388527066352,
          "phase": "BCC_A2",
          "x_hi": 1.0,
          "x_lo": 0.999983921293549
        }
      ],
      "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": -30899.637375421757,
          "energy_per_atom": -30899.637375421757,
          "enthalpy": -32613.999922270734,
          "entries_at_x": 1,
          "entropy": -5.750000157132277,
          "formula": "",
          "nsites": null,
          "phase": "AL3TA_D022",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.25
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -29568.87988007107,
          "energy_per_atom": -29568.87988007107,
          "enthalpy": -30999.99992603318,
          "entries_at_x": 1,
          "entropy": -4.8000001541576935,
          "formula": "",
          "nsites": null,
          "phase": "AL3TA2_L",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.4
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -24612.856551699973,
          "energy_per_atom": -24612.856551699973,
          "enthalpy": -25477.43449934378,
          "entries_at_x": 1,
          "entropy": -2.899808645459693,
          "formula": "",
          "nsites": null,
          "phase": "SIGMA_D8B",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.614437613037893
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -21005.54994017945,
          "energy_per_atom": -21005.54994017945,
          "enthalpy": -21899.999955490817,
          "entries_at_x": 1,
          "entropy": -3.00000005135459,
          "formula": "",
          "nsites": null,
          "phase": "SIGMA_D8B",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.7333333331557963
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -1.3062853878782335,
          "energy_per_atom": -1.3062853878782335,
          "enthalpy": -0.9472504884137851,
          "entries_at_x": 1,
          "entropy": 0.001204208953424768,
          "formula": "",
          "nsites": null,
          "phase": "BCC_A2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.999983921293549
        },
        {
          "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": "AlTa-98Sau",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:14:25Z",
    "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/AlTa-98Sau.tdb",
    "source_sha256": "790811d9dcc140fcdf7588bfa4873178564f71350062bbe75849a62e6974132c"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "AL-TA",
  "x_element": "TA"
}