{
  "counts": {
    "above_hull": 26,
    "entries": 98,
    "intervals": 6,
    "vertices": 7
  },
  "elements": [
    "BI",
    "SR"
  ],
  "flags": [
    "has_intermediate_compounds",
    "mp_agreement_not_comparable",
    "theoretical_vertices"
  ],
  "isotherms": [
    {
      "intervals": [
        {
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-640404",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -1.8062603649999989,
          "right": {
            "phase": "oqmd-1367999",
            "x": 0.3333333333333333
          },
          "slope": -1.8062603649999989,
          "x_hi": 0.3333333333333333,
          "x_lo": 0.0
        },
        {
          "intercept": -0.06885570499999794,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1367999",
            "x": 0.3333333333333333
          },
          "mu_a_rel": -0.06885570499999794,
          "mu_b_rel": -1.668548955000003,
          "right": {
            "phase": "oqmd-18229",
            "x": 0.4
          },
          "slope": -1.5996932500000052,
          "x_hi": 0.4,
          "x_lo": 0.3333333333333333
        },
        {
          "intercept": -0.17224344653846446,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-18229",
            "x": 0.4
          },
          "mu_a_rel": -0.17224344653846446,
          "mu_b_rel": -1.5134673426923033,
          "right": {
            "phase": "oqmd-50743",
            "x": 0.5238095238095238
          },
          "slope": -1.341223896153839,
          "x_hi": 0.5238095238095238,
          "x_lo": 0.4
        },
        {
          "intercept": -0.47030284948717394,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-50743",
            "x": 0.5238095238095238
          },
          "mu_a_rel": -0.47030284948717394,
          "mu_b_rel": -1.2425042491025673,
          "right": {
            "phase": "oqmd-2141558",
            "x": 0.5925925925925926
          },
          "slope": -0.7722013996153935,
          "x_hi": 0.5925925925925926,
          "x_lo": 0.5238095238095238
        },
        {
          "intercept": -1.6862573042857076,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-2141558",
            "x": 0.5925925925925926
          },
          "mu_a_rel": -1.6862573042857076,
          "mu_b_rel": -0.4065355614285753,
          "right": {
            "phase": "oqmd-7612",
            "x": 0.625
          },
          "slope": 1.2797217428571324,
          "x_hi": 0.625,
          "x_lo": 0.5925925925925926
        },
        {
          "intercept": -2.363816573333333,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-7612",
            "x": 0.625
          },
          "mu_a_rel": -2.363816573333333,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "oqmd-ref-Sr",
            "x": 1.0
          },
          "slope": 2.363816573333333,
          "x_hi": 1.0,
          "x_lo": 0.625
        }
      ],
      "temperature_K": 0.0,
      "vertices": [
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -4.038931855,
          "entries_at_x": 33,
          "formula": "Bi1",
          "nsites": 2,
          "phase": "oqmd-640404",
          "phase_kind": "structure",
          "spacegroup_number": 166,
          "spacegroup_symbol": "R-3m",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.602086788333333,
          "energy_per_atom": -3.8556792916666667,
          "entries_at_x": 8,
          "formula": "Bi2 Sr1",
          "nsites": 6,
          "phase": "oqmd-1367999",
          "phase_kind": "structure",
          "spacegroup_number": 11,
          "spacegroup_symbol": "P21/m",
          "theoretical": true,
          "x": 0.3333333333333333
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.708733005,
          "energy_per_atom": -3.805257638,
          "entries_at_x": 2,
          "formula": "Bi3 Sr2",
          "nsites": 20,
          "phase": "oqmd-18229",
          "phase_kind": "structure",
          "spacegroup_number": 52,
          "spacegroup_symbol": "Pnna",
          "theoretical": false,
          "x": 0.4
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.874789296904761,
          "energy_per_atom": -3.67961645642857,
          "entries_at_x": 1,
          "formula": "Bi10 Sr11",
          "nsites": 42,
          "phase": "oqmd-50743",
          "phase_kind": "structure",
          "spacegroup_number": 139,
          "spacegroup_symbol": "I4/mmm",
          "theoretical": false,
          "x": 0.5238095238095238
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.9279036788888886,
          "energy_per_atom": -3.5706766864814816,
          "entries_at_x": 1,
          "formula": "Bi11 Sr16",
          "nsites": 54,
          "phase": "oqmd-2141558",
          "phase_kind": "structure",
          "spacegroup_number": 18,
          "spacegroup_symbol": "P21212",
          "theoretical": true,
          "x": 0.5925925925925926
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.886431215,
          "energy_per_atom": -3.452851785625,
          "entries_at_x": 2,
          "formula": "Bi3 Sr5",
          "nsites": 16,
          "phase": "oqmd-7612",
          "phase_kind": "structure",
          "spacegroup_number": 193,
          "spacegroup_symbol": "P63/mcm",
          "theoretical": false,
          "x": 0.625
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -1.682914,
          "entries_at_x": 24,
          "formula": "Sr",
          "nsites": null,
          "phase": "oqmd-ref-Sr",
          "phase_kind": "structure",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "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": 2.9547708724209087e-09,
    "only_mp_stable": [
      "oqmd-ref-Bi"
    ],
    "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": "BI-SR",
  "x_element": "SR"
}
