{
  "counts": {
    "above_hull": 20,
    "entries": 94,
    "intervals": 4,
    "vertices": 5
  },
  "elements": [
    "CE",
    "CO"
  ],
  "flags": [
    "has_intermediate_compounds",
    "mp_agreement_not_comparable",
    "theoretical_vertices"
  ],
  "isotherms": [
    {
      "intervals": [
        {
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-592420",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -0.118067045,
          "right": {
            "phase": "oqmd-1437310",
            "x": 0.25
          },
          "slope": -0.118067045,
          "x_hi": 0.25,
          "x_lo": 0.0
        },
        {
          "intercept": -0.01835721749999645,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1437310",
            "x": 0.25
          },
          "mu_a_rel": -0.01835721749999645,
          "mu_b_rel": -0.06299539250001066,
          "right": {
            "phase": "oqmd-1821764",
            "x": 0.2857142857142857
          },
          "slope": -0.044638175000014206,
          "x_hi": 0.2857142857142857,
          "x_lo": 0.25
        },
        {
          "intercept": -0.03042302324074158,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1821764",
            "x": 0.2857142857142857
          },
          "mu_a_rel": -0.03042302324074158,
          "mu_b_rel": -0.03283087814814783,
          "right": {
            "phase": "oqmd-29048",
            "x": 0.8947368421052632
          },
          "slope": -0.0024078549074062457,
          "x_hi": 0.8947368421052632,
          "x_lo": 0.2857142857142857
        },
        {
          "intercept": -0.3094854874999981,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-29048",
            "x": 0.8947368421052632
          },
          "mu_a_rel": -0.3094854874999981,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "oqmd-594128",
            "x": 1.0
          },
          "slope": 0.3094854874999981,
          "x_hi": 1.0,
          "x_lo": 0.8947368421052632
        }
      ],
      "temperature_K": 0.0,
      "vertices": [
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -4.7771708225,
          "entries_at_x": 20,
          "formula": "Ce1",
          "nsites": 4,
          "phase": "oqmd-592420",
          "phase_kind": "structure",
          "spacegroup_number": 194,
          "spacegroup_symbol": "P63/mmc",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.02951676125,
          "energy_per_atom": -5.384786128125,
          "entries_at_x": 6,
          "formula": "Ce3 Co1",
          "nsites": 16,
          "phase": "oqmd-1437310",
          "phase_kind": "structure",
          "spacegroup_number": 62,
          "spacegroup_symbol": "Pnma",
          "theoretical": true,
          "x": 0.25
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.03111098178571479,
          "energy_per_atom": -5.468965855,
          "entries_at_x": 1,
          "formula": "Ce5 Co2",
          "nsites": 14,
          "phase": "oqmd-1821764",
          "phase_kind": "structure",
          "spacegroup_number": 15,
          "spacegroup_symbol": "C2/c",
          "theoretical": true,
          "x": 0.2857142857142857
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.0325774197368419,
          "energy_per_atom": -6.87873250631579,
          "entries_at_x": 2,
          "formula": "Ce2 Co17",
          "nsites": 19,
          "phase": "oqmd-29048",
          "phase_kind": "structure",
          "spacegroup_number": 166,
          "spacegroup_symbol": "R-3m",
          "theoretical": false,
          "x": 0.8947368421052632
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -7.089565,
          "entries_at_x": 38,
          "formula": "Co1",
          "nsites": 1,
          "phase": "oqmd-594128",
          "phase_kind": "structure",
          "spacegroup_number": 225,
          "spacegroup_symbol": "Fm-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": 0.016891099999999604,
    "only_mp_stable": [
      "oqmd-ref-Ce",
      "oqmd-ref-Co"
    ],
    "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": "CE-CO",
  "x_element": "CO"
}
