{
  "counts": {
    "above_hull": 48,
    "entries": 114,
    "intervals": 6,
    "vertices": 7
  },
  "elements": [
    "AG",
    "CA"
  ],
  "flags": [
    "degenerate_endpoints",
    "has_intermediate_compounds",
    "mp_agreement_not_comparable",
    "theoretical_vertices"
  ],
  "isotherms": [
    {
      "intervals": [
        {
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-11876",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -1.1164058287499972,
          "right": {
            "phase": "oqmd-9958",
            "x": 0.2222222222222222
          },
          "slope": -1.1164058287499972,
          "x_hi": 0.2222222222222222,
          "x_lo": 0.0
        },
        {
          "intercept": -0.12519785249999799,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-9958",
            "x": 0.2222222222222222
          },
          "mu_a_rel": -0.12519785249999799,
          "mu_b_rel": -0.6782133450000041,
          "right": {
            "phase": "oqmd-10357",
            "x": 0.3333333333333333
          },
          "slope": -0.5530154925000061,
          "x_hi": 0.3333333333333333,
          "x_lo": 0.2222222222222222
        },
        {
          "intercept": -0.22622545999999988,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-10357",
            "x": 0.3333333333333333
          },
          "mu_a_rel": -0.22622545999999988,
          "mu_b_rel": -0.4761581300000003,
          "right": {
            "phase": "oqmd-2168876",
            "x": 0.5
          },
          "slope": -0.24993267000000038,
          "x_hi": 0.5,
          "x_lo": 0.3333333333333333
        },
        {
          "intercept": -0.5589597037500005,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-2168876",
            "x": 0.5
          },
          "mu_a_rel": -0.5589597037500005,
          "mu_b_rel": -0.1434238862499997,
          "right": {
            "phase": "oqmd-10358",
            "x": 0.625
          },
          "slope": 0.4155358175000008,
          "x_hi": 0.625,
          "x_lo": 0.5
        },
        {
          "intercept": -0.7578284068749991,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-10358",
            "x": 0.625
          },
          "mu_a_rel": -0.7578284068749991,
          "mu_b_rel": -0.024102664375000526,
          "right": {
            "phase": "oqmd-1787095",
            "x": 0.75
          },
          "slope": 0.7337257424999986,
          "x_hi": 0.75,
          "x_lo": 0.625
        },
        {
          "intercept": -0.8301364000000007,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1787095",
            "x": 0.75
          },
          "mu_a_rel": -0.8301364000000007,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "oqmd-594524",
            "x": 1.0
          },
          "slope": 0.8301364000000007,
          "x_hi": 1.0,
          "x_lo": 0.75
        }
      ],
      "temperature_K": 0.0,
      "vertices": [
        {
          "collinear": false,
          "degenerate": [
            {
              "energy": 0.0,
              "phase": "oqmd-1520469"
            },
            {
              "energy": 0.0,
              "phase": "oqmd-1972133"
            }
          ],
          "energy": 0.0,
          "energy_per_atom": -2.8217729525,
          "entries_at_x": 31,
          "formula": "Ag1",
          "nsites": 4,
          "phase": "oqmd-11876",
          "phase_kind": "structure",
          "spacegroup_number": 194,
          "spacegroup_symbol": "P63/mmc",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.248090184166666,
          "energy_per_atom": -2.88231736944444,
          "entries_at_x": 1,
          "formula": "Ag7 Ca2",
          "nsites": 18,
          "phase": "oqmd-9958",
          "phase_kind": "structure",
          "spacegroup_number": 63,
          "spacegroup_symbol": "Cmcm",
          "theoretical": false,
          "x": 0.2222222222222222
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.30953635,
          "energy_per_atom": -2.84999065166667,
          "entries_at_x": 5,
          "formula": "Ag2 Ca1",
          "nsites": 6,
          "phase": "oqmd-10357",
          "phase_kind": "structure",
          "spacegroup_number": 74,
          "spacegroup_symbol": "Imma",
          "theoretical": false,
          "x": 0.3333333333333333
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.3511917950000001,
          "energy_per_atom": -2.75098677125,
          "entries_at_x": 19,
          "formula": "Ag1 Ca1",
          "nsites": 8,
          "phase": "oqmd-2168876",
          "phase_kind": "structure",
          "spacegroup_number": 62,
          "spacegroup_symbol": "Pnma",
          "theoretical": true,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.2992498178125,
          "energy_per_atom": -2.5935503,
          "entries_at_x": 1,
          "formula": "Ag3 Ca5",
          "nsites": 16,
          "phase": "oqmd-10358",
          "phase_kind": "structure",
          "spacegroup_number": 140,
          "spacegroup_symbol": "I4/mcm",
          "theoretical": false,
          "x": 0.625
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.20753410000000017,
          "energy_per_atom": -2.396340088125,
          "entries_at_x": 5,
          "formula": "Ag1 Ca3",
          "nsites": 16,
          "phase": "oqmd-1787095",
          "phase_kind": "structure",
          "spacegroup_number": 62,
          "spacegroup_symbol": "Pnma",
          "theoretical": true,
          "x": 0.75
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -1.977817,
          "entries_at_x": 31,
          "formula": "Ca1",
          "nsites": 1,
          "phase": "oqmd-594524",
          "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": 1.0632436875379625e-09,
    "only_mp_stable": [
      "oqmd-ref-Ag",
      "oqmd-ref-Ca"
    ],
    "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": "AG-CA",
  "x_element": "CA"
}