Static simulations at ground state geometry of SF 6 of F1s XA and XE spectra and of fluorescence K-edge RIXS at different resonances were performed. Energies and transition moments of the electronic states were calculated with density functional theory (DFT) in the ORCA package version 4.2.0 , using restricted open shell configuration interaction singles (DFT-ROCIS) and linear response time-dependent DFT (TD-DFT) protocols . In addition, the transition potential method (TP-DFT) for full core-hole excitation (XFH) in the CP2K program suite was used for obtaining a more accurate potential surface for the lowest coreexcited state.