{
  "counts": {
    "above_hull": 9,
    "entries": 28,
    "intervals": 4,
    "vertices": 5
  },
  "elements": [
    "AL",
    "CO"
  ],
  "flags": [
    "has_intermediate_compounds"
  ],
  "isotherms": [
    {
      "intervals": [
        {
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "mp-aaaaaafe",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -1.825358285,
          "right": {
            "phase": "mp-aaaaayke",
            "x": 0.18181818181818182
          },
          "slope": -1.825358285,
          "x_hi": 0.18181818181818182,
          "x_lo": 0.0
        },
        {
          "intercept": -0.10609174937500038,
          "kind": "two_phase",
          "left": {
            "phase": "mp-aaaaayke",
            "x": 0.18181818181818182
          },
          "mu_a_rel": -0.10609174937500038,
          "mu_b_rel": -1.3479454128124984,
          "right": {
            "phase": "mp-aaaaaaho",
            "x": 0.2857142857142857
          },
          "slope": -1.241853663437498,
          "x_hi": 0.2857142857142857,
          "x_lo": 0.18181818181818182
        },
        {
          "intercept": -0.26014782083333304,
          "kind": "two_phase",
          "left": {
            "phase": "mp-aaaaaaho",
            "x": 0.2857142857142857
          },
          "mu_a_rel": -0.26014782083333304,
          "mu_b_rel": -0.9628052341666666,
          "right": {
            "phase": "mp-aaaaaaky",
            "x": 0.5
          },
          "slope": -0.7026574133333335,
          "x_hi": 0.5,
          "x_lo": 0.2857142857142857
        },
        {
          "intercept": -1.2229530549999996,
          "kind": "two_phase",
          "left": {
            "phase": "mp-aaaaaaky",
            "x": 0.5
          },
          "mu_a_rel": -1.2229530549999996,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "mp-aaaaaacc",
            "x": 1.0
          },
          "slope": 1.2229530549999996,
          "x_hi": 1.0,
          "x_lo": 0.5
        }
      ],
      "temperature_K": 0.0,
      "vertices": [
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -3.74557583,
          "entries_at_x": 10,
          "formula": "Al",
          "nsites": 1,
          "phase": "mp-aaaaaafe",
          "phase_kind": "structure",
          "spacegroup_number": 225,
          "spacegroup_symbol": "Fm-3m",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.33188332454545455,
          "energy_per_atom": -4.688866784545454,
          "entries_at_x": 1,
          "formula": "Al9Co2",
          "nsites": 22,
          "phase": "mp-aaaaayke",
          "phase_kind": "structure",
          "spacegroup_number": 14,
          "spacegroup_symbol": "P2_1/c",
          "theoretical": false,
          "x": 0.18181818181818182
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.46090708178571405,
          "energy_per_atom": -5.167266330357143,
          "entries_at_x": 1,
          "formula": "Al5Co2",
          "nsites": 28,
          "phase": "mp-aaaaaaho",
          "phase_kind": "structure",
          "spacegroup_number": 194,
          "spacegroup_symbol": "P6_3/mmc",
          "theoretical": false,
          "x": 0.2857142857142857
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.6114765274999998,
          "energy_per_atom": -6.03842334,
          "entries_at_x": 1,
          "formula": "AlCo",
          "nsites": 2,
          "phase": "mp-aaaaaaky",
          "phase_kind": "structure",
          "spacegroup_number": 221,
          "spacegroup_symbol": "Pm-3m",
          "theoretical": false,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -7.108317795,
          "entries_at_x": 8,
          "formula": "Co",
          "nsites": 2,
          "phase": "mp-aaaaaacc",
          "phase_kind": "structure",
          "spacegroup_number": 194,
          "spacegroup_symbol": "P6_3/mmc",
          "theoretical": false,
          "x": 1.0
        }
      ]
    }
  ],
  "mp_agreement": {
    "comparable": true,
    "comparable_note": "",
    "max_abs_delta_energy_above_hull": 8.881784197001252e-16,
    "only_mp_stable": [],
    "only_ours_stable": [],
    "stable_sets_match": true
  },
  "provenance": {
    "above_hull_window_eV": 0.05,
    "builder_version": 1,
    "collinear_tol": 1e-12,
    "correction_model": "MP2020 (applied upstream by the Materials Project; none added)",
    "degenerate_tol": 1e-06,
    "entry_pool": "all_nondeprecated",
    "is_stable_source": "upstream_flag",
    "observed_at": "2026-09-01T20:54:47Z",
    "snapshot_scope_elements": [],
    "snapshot_scope_kind": "full",
    "snapshot_sha256": "b6deba8ecf1b67211b3d89cd33a5f98a1939d4bcd92db561818195e55187492a",
    "source_release": "2026.04.13",
    "stability_tol": 0.0001,
    "thermo_type": "GGA_GGA+U",
    "upstream_energy_corrections": "MP2020 compatibility corrections (anion and GGA/GGA+U mixing corrections), applied by the Materials Project to its GGA_GGA+U thermo energies"
  },
  "reference": {
    "kind": "dft_elemental_ground_state_0K",
    "per": "atom",
    "temperature_K": 0.0,
    "units": "eV/atom"
  },
  "schema_version": 1,
  "system_id": "AL-CO",
  "x_element": "CO"
}