{
  "counts": {
    "above_hull": 27,
    "entries": 97,
    "intervals": 5,
    "vertices": 6
  },
  "elements": [
    "AL",
    "BA"
  ],
  "flags": [
    "has_intermediate_compounds",
    "mp_agreement_not_comparable"
  ],
  "isotherms": [
    {
      "intervals": [
        {
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-ref-Al",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -1.1861067399999998,
          "right": {
            "phase": "oqmd-10391",
            "x": 0.2
          },
          "slope": -1.1861067399999998,
          "x_hi": 0.2,
          "x_lo": 0.0
        },
        {
          "intercept": -0.23946848431818182,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-10391",
            "x": 0.2
          },
          "mu_a_rel": -0.23946848431818182,
          "mu_b_rel": -0.22823280272727267,
          "right": {
            "phase": "oqmd-111389",
            "x": 0.3442622950819672
          },
          "slope": 0.011235681590909164,
          "x_hi": 0.3442622950819672,
          "x_lo": 0.2
        },
        {
          "intercept": -0.2582806030000011,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-111389",
            "x": 0.3442622950819672
          },
          "mu_a_rel": -0.2582806030000011,
          "mu_b_rel": -0.1924001957142836,
          "right": {
            "phase": "oqmd-26825",
            "x": 0.4117647058823529
          },
          "slope": 0.06588040728571751,
          "x_hi": 0.4117647058823529,
          "x_lo": 0.3442622950819672
        },
        {
          "intercept": -0.3216444879999999,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-26825",
            "x": 0.4117647058823529
          },
          "mu_a_rel": -0.3216444879999999,
          "mu_b_rel": -0.10188035999999964,
          "right": {
            "phase": "oqmd-2029",
            "x": 0.4444444444444444
          },
          "slope": 0.21976412800000025,
          "x_hi": 0.4444444444444444,
          "x_lo": 0.4117647058823529
        },
        {
          "intercept": -0.40314877599999954,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-2029",
            "x": 0.4444444444444444
          },
          "mu_a_rel": -0.40314877599999954,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "oqmd-603869",
            "x": 1.0
          },
          "slope": 0.40314877599999954,
          "x_hi": 1.0,
          "x_lo": 0.4444444444444444
        }
      ],
      "temperature_K": 0.0,
      "vertices": [
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -3.745739,
          "entries_at_x": 23,
          "formula": "Al",
          "nsites": null,
          "phase": "oqmd-ref-Al",
          "phase_kind": "structure",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.237221348,
          "energy_per_atom": -3.618518332,
          "entries_at_x": 2,
          "formula": "Al4 Ba1",
          "nsites": 5,
          "phase": "oqmd-10391",
          "phase_kind": "structure",
          "spacegroup_number": 139,
          "spacegroup_symbol": "I4/mmm",
          "theoretical": false,
          "x": 0.2
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.23560046278688523,
          "energy_per_atom": -3.3540209067213116,
          "entries_at_x": 1,
          "formula": "Al40 Ba21",
          "nsites": 61,
          "phase": "oqmd-111389",
          "phase_kind": "structure",
          "spacegroup_number": 157,
          "spacegroup_symbol": "P31m",
          "theoretical": false,
          "x": 0.3442622950819672
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.231153376470588,
          "energy_per_atom": -3.22657009176471,
          "entries_at_x": 1,
          "formula": "Al10 Ba7",
          "nsites": 17,
          "phase": "oqmd-26825",
          "phase_kind": "structure",
          "spacegroup_number": 166,
          "spacegroup_symbol": "R-3m",
          "theoretical": false,
          "x": 0.4117647058823529
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.223971542222222,
          "energy_per_atom": -3.15983883333333,
          "entries_at_x": 1,
          "formula": "Al5 Ba4",
          "nsites": 18,
          "phase": "oqmd-2029",
          "phase_kind": "structure",
          "spacegroup_number": 194,
          "spacegroup_symbol": "P63/mmc",
          "theoretical": false,
          "x": 0.4444444444444444
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -1.92352708,
          "entries_at_x": 24,
          "formula": "Ba1",
          "nsites": 1,
          "phase": "oqmd-603869",
          "phase_kind": "structure",
          "spacegroup_number": 229,
          "spacegroup_symbol": "Im-3m",
          "theoretical": false,
          "x": 1.0
        }
      ]
    }
  ],
  "mp_agreement": {
    "comparable": false,
    "comparable_note": "is_stable is derived by the extraction, not an upstream flag, so comparing it against a hull recomputed from the same energies tests the derivation rather than the data",
    "max_abs_delta_energy_above_hull": 1.054317078086342e-09,
    "only_mp_stable": [
      "oqmd-ref-Ba"
    ],
    "only_ours_stable": [],
    "stable_sets_match": false
  },
  "provenance": {
    "above_hull_window_eV": 0.05,
    "builder_version": 1,
    "collinear_tol": 1e-12,
    "correction_model": "OQMD fit-partial ('standard' fit, applied upstream by OQMD; none added)",
    "degenerate_tol": 1e-06,
    "entry_pool": "all_nondeprecated",
    "is_stable_source": "derived",
    "observed_at": "2026-09-05T17:02:03Z",
    "snapshot_scope_elements": [],
    "snapshot_scope_kind": "full",
    "snapshot_sha256": "2a9393262c52ec35600424236c352a4cdb3291c8b25c1c6588f5e62abe8e0d8d",
    "source_release": "qmdb_v1_8_022026",
    "stability_tol": 0.0001,
    "thermo_type": "standard",
    "upstream_energy_corrections": "OQMD 'standard' fit (fit-partial of Kirklin et al. 2015): elemental reference energies of a subset of elements fitted to experimental formation enthalpies, applied by OQMD"
  },
  "reference": {
    "kind": "dft_fitted_elemental_reference_0K",
    "per": "atom",
    "temperature_K": 0.0,
    "units": "eV/atom"
  },
  "schema_version": 1,
  "system_id": "AL-BA",
  "x_element": "BA"
}