{
  "counts": {
    "above_hull": 0,
    "entries": 6,
    "intervals": 5,
    "vertices": 6
  },
  "elements": [
    "NA",
    "RB"
  ],
  "flags": [
    "has_intermediate_phases",
    "liquid_on_hull",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "NA": {
          "energy": -15295.094500478719,
          "phase": "BCC_A2"
        },
        "RB": {
          "energy": -22891.958116889717,
          "phase": "BCC_A2"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                72.52632387303102,
                -0.4184645447404449,
                -0.0011673047395959202
              ]
            ],
            "knots": [
              0.0,
              0.0058022019088750315
            ],
            "max_abs_error": 0.00016915861796817921
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                -1.7398731418415273e-05,
                3.7021082159251296e-05,
                -1.8494971605068034e-05
              ]
            ],
            "knots": [
              0.0,
              0.0058022019088750315
            ],
            "max_abs_error": 2.689541178009636e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              72.53151130468561,
              -0.42950237961866833,
              0.004346970395374683
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.0058022019088750315
          ],
          "max_abs_error": 0.0006327281085951597,
          "phase": "BCC_A2#1",
          "x_hi": 0.0058022019088750315,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 46.680012258921465,
            "slope": 4382.246630496766
          },
          "entropy": {
            "intercept": 0.20353683674329492,
            "slope": 16.026721641677508
          },
          "intercept": -14.004495616091306,
          "kind": "two_phase",
          "left": {
            "phase": "BCC_A2#1",
            "x": 0.0058022019088750315
          },
          "mu_a_rel": -14.004495616091306,
          "mu_b_rel": -410.12492258546627,
          "right": {
            "phase": "LIQUID",
            "x": 0.7059146255795031
          },
          "slope": -396.12042696937493,
          "x_hi": 0.7059146255795031,
          "x_lo": 0.0058022019088750315
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                3140.172001623085,
                -708.653294767143,
                -135.0393313121666,
                53.88979512542744
              ]
            ],
            "knots": [
              0.7059146255795031,
              0.9538449713305119
            ],
            "max_abs_error": 0.12094444576678143
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                6.4803883160646265,
                -0.24243649376435614,
                0.2628327677174198,
                0.2847661590950743
              ]
            ],
            "knots": [
              0.7059146255795031,
              0.9538449713305119
            ],
            "max_abs_error": 0.002204362825269257
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              1208.0442251884226,
              -636.3708541518349,
              -213.40292100565603,
              -31.013235209699815
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.7059146255795031,
            0.9538449713305119
          ],
          "max_abs_error": 0.7781752221035276,
          "phase": "LIQUID",
          "x_hi": 0.9538449713305119,
          "x_lo": 0.7059146255795031
        },
        {
          "enthalpy": {
            "intercept": 52662.72177885093,
            "slope": -52746.88667488739
          },
          "entropy": {
            "intercept": 186.18742553289638,
            "slope": -186.45250489040004
          },
          "intercept": -2849.0591437820617,
          "kind": "two_phase",
          "left": {
            "phase": "LIQUID",
            "x": 0.9538449713305119
          },
          "mu_a_rel": -2849.0591437820617,
          "mu_b_rel": -5.131485596755283,
          "right": {
            "phase": "BCC_A2#2",
            "x": 0.997910141711827
          },
          "slope": 2843.9276581853064,
          "x_hi": 0.997910141711827,
          "x_lo": 0.9538449713305119
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                26.068622256372734,
                -26.01404091313986,
                -0.0557563069835183,
                0.0011749637506426325
              ]
            ],
            "knots": [
              0.997910141711827,
              1.0
            ],
            "max_abs_error": 0.0001685598074026018
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                4.048654997229617e-07,
                -4.817986612816242e-07,
                -1.4204688864854597e-05,
                1.428162202641326e-05
              ]
            ],
            "knots": [
              0.997910141711827,
              1.0
            ],
            "max_abs_error": 2.0585028207204645e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              26.068501545720153,
              -26.01389726450234,
              -0.051521179000573625,
              -0.0030831022172392863
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.997910141711827,
            1.0
          ],
          "max_abs_error": 0.0004451829472564839,
          "phase": "BCC_A2#2",
          "x_hi": 1.0,
          "x_lo": 0.997910141711827
        }
      ],
      "phase_instances": {
        "BCC_A2#1": "BCC_A2",
        "BCC_A2#2": "BCC_A2"
      },
      "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": "BCC_A2#1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -16.302866313597406,
          "energy_per_atom": -16.302866313597406,
          "enthalpy": 72.10669202355098,
          "entries_at_x": 1,
          "entropy": 0.29652711164564494,
          "formula": "",
          "nsites": null,
          "phase": "BCC_A2#1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0058022019088750315
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -293.6316985045705,
          "energy_per_atom": -293.6316985045705,
          "enthalpy": 3140.172001623085,
          "entries_at_x": 1,
          "entropy": 11.517034043694991,
          "formula": "",
          "nsites": null,
          "phase": "LIQUID",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.7059146255795031
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -136.39304819424797,
          "energy_per_atom": -136.39304819424797,
          "enthalpy": 2350.3691706692034,
          "entries_at_x": 1,
          "entropy": 8.340641351210635,
          "formula": "",
          "nsites": null,
          "phase": "LIQUID",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.9538449713305119
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -11.074891384178045,
          "energy_per_atom": -11.074891384178045,
          "enthalpy": 26.068622256372734,
          "entries_at_x": 1,
          "entropy": 0.12457995519217491,
          "formula": "",
          "nsites": null,
          "phase": "BCC_A2#2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.997910141711827
        },
        {
          "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#2",
          "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": "NaRb-85Pot-LB",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:50:33Z",
    "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/NaRb-85Pot-LB.tdb",
    "source_sha256": "c455e6a15e14951bd09519c3642e2fa8fab58294a203fa44f4bc88dc8b87e3eb"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "NA-RB",
  "x_element": "RB"
}