Table 5. Excited and Optical Properties for Bulk MgF₂ Crystals^a.

solid	Egap [eV]	Eopt [eV]	Ev [eV]
MgF2	12.17 (12.4)	10.90 (11.2)	1.127 (1.2)

^aThis crystal has the rutile structure. These data are taken a work of Yi and Jia.³⁹ The quasiparticle gap (E_gap), the optical onset (E_opt), and the binding energy of the exciton (E_b) are reported. In parentheses, the experimental values for each observable as quoted in the same reference are reported. These quantities are referred to the fundamental direct transition of MgF₂.