Formation energy: Computed formation energy at 0K, 0atm using a reference state of zero for the pure elements. This quantity is often a good approximation for formation enthalpy at ambient conditions.
Energy above hull The energy of decomposition of this material into the set of most stable materials at this chemical composition, in eV/atom. Stability is tested against all potential chemical combinations that result in the material's composition. For example, a Co2O3 structure would be tested for decomposition against other Co2O3 structures, against Co and O2 mixtures, and against CoO and O…