Coupled Insights into Structural, Electronic, and Optical Properties of GeTMS₃(TM=Sc, Fe, Zn) Sulfide Perovskite across Different Phases: Ab Initio Study

Table 7

Static optical properties for GeZnS₃: dielectric constants and , static refractive index , and static reflectivity for all directions.

Phase	Direction
221-Pm-3m		54.80	1.70	7.50	0.59
127-P4/mbm		46.80	0.20	3.70	0.33
		43.30	0.10	3.20	0.27
62-Pnma		15.80	0.40	4.00	0.36
		17.00	0.70	4.10	0.37
		13.80	0.50	3.70	0.33