{
  "counts": {
    "above_hull": 16,
    "entries": 95,
    "intervals": 8,
    "vertices": 9
  },
  "elements": [
    "CO",
    "HO"
  ],
  "flags": [
    "has_intermediate_compounds",
    "mp_agreement_not_comparable",
    "theoretical_vertices"
  ],
  "isotherms": [
    {
      "intervals": [
        {
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-594128",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -0.9780815433333174,
          "right": {
            "phase": "oqmd-1797317",
            "x": 0.07692307692307693
          },
          "slope": -0.9780815433333174,
          "x_hi": 0.07692307692307693,
          "x_lo": 0.0
        },
        {
          "intercept": -0.01613292122448797,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1797317",
            "x": 0.07692307692307693
          },
          "mu_a_rel": -0.01613292122448797,
          "mu_b_rel": -0.7844864886394618,
          "right": {
            "phase": "oqmd-1280603",
            "x": 0.20689655172413793
          },
          "slope": -0.7683535674149738,
          "x_hi": 0.20689655172413793,
          "x_lo": 0.07692307692307693
        },
        {
          "intercept": -0.04434192400000367,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1280603",
            "x": 0.20689655172413793
          },
          "mu_a_rel": -0.04434192400000367,
          "mu_b_rel": -0.676351977999985,
          "right": {
            "phase": "oqmd-31229",
            "x": 0.25
          },
          "slope": -0.6320100539999813,
          "x_hi": 0.25,
          "x_lo": 0.20689655172413793
        },
        {
          "intercept": -0.15778197111110975,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-31229",
            "x": 0.25
          },
          "mu_a_rel": -0.15778197111110975,
          "mu_b_rel": -0.3360318366666667,
          "right": {
            "phase": "oqmd-1471734",
            "x": 0.4
          },
          "slope": -0.17824986555555697,
          "x_hi": 0.4,
          "x_lo": 0.25
        },
        {
          "intercept": -0.20558193000000274,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1471734",
            "x": 0.4
          },
          "mu_a_rel": -0.20558193000000274,
          "mu_b_rel": -0.26433189833332726,
          "right": {
            "phase": "oqmd-1370499",
            "x": 0.5
          },
          "slope": -0.058749968333324534,
          "x_hi": 0.5,
          "x_lo": 0.4
        },
        {
          "intercept": -0.32194310500000056,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1370499",
            "x": 0.5
          },
          "mu_a_rel": -0.32194310500000056,
          "mu_b_rel": -0.14797072333332942,
          "right": {
            "phase": "oqmd-1991800",
            "x": 0.7142857142857143
          },
          "slope": 0.17397238166667114,
          "x_hi": 0.7142857142857143,
          "x_lo": 0.5
        },
        {
          "intercept": -0.5377881300000051,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1991800",
            "x": 0.7142857142857143
          },
          "mu_a_rel": -0.5377881300000051,
          "mu_b_rel": -0.06163271333332754,
          "right": {
            "phase": "oqmd-29371",
            "x": 0.75
          },
          "slope": 0.4761554166666776,
          "x_hi": 0.75,
          "x_lo": 0.7142857142857143
        },
        {
          "intercept": -0.722686269999988,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-29371",
            "x": 0.75
          },
          "mu_a_rel": -0.722686269999988,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "oqmd-9314",
            "x": 1.0
          },
          "slope": 0.722686269999988,
          "x_hi": 1.0,
          "x_lo": 0.75
        }
      ],
      "temperature_K": 0.0,
      "vertices": [
        {
          "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": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.07523704179487058,
          "energy_per_atom": -6.971511937692307,
          "entries_at_x": 1,
          "formula": "Co12 Ho1",
          "nsites": 13,
          "phase": "oqmd-1797317",
          "phase_kind": "structure",
          "spacegroup_number": 139,
          "spacegroup_symbol": "I4/mmm",
          "theoretical": true,
          "x": 0.07692307692307693
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.175102624827586,
          "energy_per_atom": -6.74478389655172,
          "entries_at_x": 1,
          "formula": "Co23 Ho6",
          "nsites": 29,
          "phase": "oqmd-1280603",
          "phase_kind": "structure",
          "spacegroup_number": 225,
          "spacegroup_symbol": "Fm-3m",
          "theoretical": true,
          "x": 0.20689655172413793
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.202344437499999,
          "energy_per_atom": -6.66371659916667,
          "entries_at_x": 6,
          "formula": "Co3 Ho1",
          "nsites": 12,
          "phase": "oqmd-31229",
          "phase_kind": "structure",
          "spacegroup_number": 166,
          "spacegroup_symbol": "R-3m",
          "theoretical": false,
          "x": 0.25
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.22908191733333255,
          "energy_per_atom": -6.313538376,
          "entries_at_x": 1,
          "formula": "Co3 Ho2",
          "nsites": 10,
          "phase": "oqmd-1471734",
          "phase_kind": "structure",
          "spacegroup_number": 64,
          "spacegroup_symbol": "Cmca",
          "theoretical": true,
          "x": 0.4
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.234956914166665,
          "energy_per_atom": -6.0681362375,
          "entries_at_x": 9,
          "formula": "Co1 Ho1",
          "nsites": 4,
          "phase": "oqmd-1370499",
          "phase_kind": "structure",
          "spacegroup_number": 63,
          "spacegroup_symbol": "Cmcm",
          "theoretical": true,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.19767711809523547,
          "energy_per_atom": -5.492405437142857,
          "entries_at_x": 1,
          "formula": "Co2 Ho5",
          "nsites": 14,
          "phase": "oqmd-1991800",
          "phase_kind": "structure",
          "spacegroup_number": 15,
          "spacegroup_symbol": "C2/c",
          "theoretical": true,
          "x": 0.7142857142857143
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.180671567499997,
          "energy_per_atom": -5.3856580525,
          "entries_at_x": 5,
          "formula": "Co1 Ho3",
          "nsites": 16,
          "phase": "oqmd-29371",
          "phase_kind": "structure",
          "spacegroup_number": 62,
          "spacegroup_symbol": "Pnma",
          "theoretical": false,
          "x": 0.75
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -4.57679364666667,
          "entries_at_x": 20,
          "formula": "Ho1",
          "nsites": 3,
          "phase": "oqmd-9314",
          "phase_kind": "structure",
          "spacegroup_number": 166,
          "spacegroup_symbol": "R-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-Co",
      "oqmd-ref-Ho"
    ],
    "only_ours_stable": [
      "oqmd-1471734",
      "oqmd-1797317"
    ],
    "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": "CO-HO",
  "x_element": "HO"
}