{ "counts": { "above_hull": 33, "entries": 76, "intervals": 7, "vertices": 8 }, "elements": [ "EU", "GA" ], "flags": [ "has_intermediate_compounds", "mp_agreement_not_comparable", "theoretical_vertices" ], "isotherms": [ { "intervals": [ { "intercept": 0.0, "kind": "two_phase", "left": { "phase": "oqmd-8138", "x": 0.0 }, "mu_a_rel": 0.0, "mu_b_rel": -1.2410353974999992, "right": { "phase": "oqmd-1794635", "x": 0.3076923076923077 }, "slope": -1.2410353974999992, "x_hi": 0.3076923076923077, "x_lo": 0.0 }, { "intercept": -0.0028375999999992185, "kind": "two_phase", "left": { "phase": "oqmd-1794635", "x": 0.3076923076923077 }, "mu_a_rel": -0.0028375999999992185, "mu_b_rel": -1.234650797500001, "right": { "phase": "oqmd-1520766", "x": 0.3333333333333333 }, "slope": -1.2318131975000017, "x_hi": 0.3333333333333333, "x_lo": 0.3076923076923077 }, { "intercept": -0.009102644999999132, "kind": "two_phase", "left": { "phase": "oqmd-1520766", "x": 0.3333333333333333 }, "mu_a_rel": -0.009102644999999132, "mu_b_rel": -1.2221207075000011, "right": { "phase": "oqmd-18324", "x": 0.4 }, "slope": -1.213018062500002, "x_hi": 0.4, "x_lo": 0.3333333333333333 }, { "intercept": -0.10573347999999932, "kind": "two_phase", "left": { "phase": "oqmd-18324", "x": 0.4 }, "mu_a_rel": -0.10573347999999932, "mu_b_rel": -1.0771744550000009, "right": { "phase": "oqmd-1920159", "x": 0.5 }, "slope": -0.9714409750000016, "x_hi": 0.5, "x_lo": 0.4 }, { "intercept": -0.3436607400000005, "kind": "two_phase", "left": { "phase": "oqmd-1920159", "x": 0.5 }, "mu_a_rel": -0.3436607400000005, "mu_b_rel": -0.8392471949999998, "right": { "phase": "oqmd-10872", "x": 0.6666666666666666 }, "slope": -0.4955864549999992, "x_hi": 0.6666666666666666, "x_lo": 0.5 }, { "intercept": -1.4754546699999995, "kind": "two_phase", "left": { "phase": "oqmd-10872", "x": 0.6666666666666666 }, "mu_a_rel": -1.4754546699999995, "mu_b_rel": -0.27335023000000036, "right": { "phase": "oqmd-30076", "x": 0.8 }, "slope": 1.2021044399999992, "x_hi": 0.8, "x_lo": 0.6666666666666666 }, { "intercept": -2.56885559, "kind": "two_phase", "left": { "phase": "oqmd-30076", "x": 0.8 }, "mu_a_rel": -2.56885559, "mu_b_rel": 4.440892098500626e-16, "right": { "phase": "oqmd-ref-Ga", "x": 1.0 }, "slope": 2.5688555900000005, "x_hi": 1.0, "x_lo": 0.8 } ], "temperature_K": 0.0, "vertices": [ { "collinear": false, "degenerate": [], "energy": 0.0, "energy_per_atom": -1.8875732, "entries_at_x": 19, "formula": "Eu1", "nsites": 1, "phase": "oqmd-8138", "phase_kind": "structure", "spacegroup_number": 229, "spacegroup_symbol": "Im-3m", "theoretical": false, "x": 0.0 }, { "collinear": false, "degenerate": [], "energy": -0.3818570453846152, "energy_per_atom": -2.621514342307692, "entries_at_x": 1, "formula": "Eu9 Ga4", "nsites": 13, "phase": "oqmd-1794635", "phase_kind": "structure", "spacegroup_number": 87, "spacegroup_symbol": "I4/m", "theoretical": true, "x": 0.3076923076923077 }, { "collinear": false, "degenerate": [], "energy": -0.41344199916666646, "energy_per_atom": -2.6824396375, "entries_at_x": 2, "formula": "Eu2 Ga1", "nsites": 12, "phase": "oqmd-1520766", "phase_kind": "structure", "spacegroup_number": 62, "spacegroup_symbol": "Pnma", "theoretical": true, "x": 0.3333333333333333 }, { "collinear": false, "degenerate": [], "energy": -0.49430987, "energy_per_atom": -2.839592396, "entries_at_x": 1, "formula": "Eu3 Ga2", "nsites": 10, "phase": "oqmd-18324", "phase_kind": "structure", "spacegroup_number": 15, "spacegroup_symbol": "C2/c", "theoretical": false, "x": 0.4 }, { "collinear": false, "degenerate": [], "energy": -0.5914539675000001, "energy_per_atom": -3.051163825, "entries_at_x": 8, "formula": "Eu1 Ga1", "nsites": 8, "phase": "oqmd-1920159", "phase_kind": "structure", "spacegroup_number": 63, "spacegroup_symbol": "Cmcm", "theoretical": true, "x": 0.5 }, { "collinear": false, "degenerate": [], "energy": -0.67405171, "energy_per_atom": -3.32447378666667, "entries_at_x": 5, "formula": "Eu1 Ga2", "nsites": 6, "phase": "oqmd-10872", "phase_kind": "structure", "spacegroup_number": 74, "spacegroup_symbol": "Imma", "theoretical": false, "x": 0.6666666666666666 }, { "collinear": false, "degenerate": [], "energy": -0.513771118, "energy_per_atom": -3.31676297, "entries_at_x": 2, "formula": "Eu1 Ga4", "nsites": 5, "phase": "oqmd-30076", "phase_kind": "structure", "spacegroup_number": 139, "spacegroup_symbol": "I4/mmm", "theoretical": false, "x": 0.8 }, { "collinear": false, "degenerate": [], "energy": 0.0, "energy_per_atom": -3.031847, "entries_at_x": 24, "formula": "Ga", "nsites": null, "phase": "oqmd-ref-Ga", "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": 1.7125699747211343e-09, "only_mp_stable": [ "oqmd-ref-Eu" ], "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": "EU-GA", "x_element": "GA" }