Table 2.

Vibrational bands associated with γ-${\mathrm{F}\mathrm{e}}_2{\mathrm{O}}_3$ [28,30], α-${\mathrm{F}\mathrm{e}}_2{\mathrm{O}}_3$ [28,31], ${\mathrm{C}\mathrm{o}}_3{\mathrm{O}}_4$ [32,33], and $\mathrm{C}\mathrm{o}{\mathrm{F}\mathrm{e}}_2{\mathrm{O}}_4$ [27,34].

	500 °C	700 °C	900 °C	1000 °C	1100 °C	Attribution
Vibrational Bands (cm−1)	300.16
	675.55					$\mathsf{\gamma }-{\mathrm{F}\mathrm{e}}_2{\mathrm{O}}_3$
	1356.40
		285.14				$\mathsf{\alpha }-{\mathrm{F}\mathrm{e}}_2{\mathrm{O}}_3$
		401.93	290.15	290.15
		603.81	605.47	605.47
		1304.51
	181.70	171.66				${\mathrm{C}\mathrm{o}}_3{\mathrm{O}}_4$
	477.00	220.00	692.23	692.23
	512.18	687.23
					205.06
			206.73	206.73	296.82
		465.33	466.34	465.33	468.33	$\mathrm{C}\mathrm{o}{\mathrm{F}\mathrm{e}}_2{\mathrm{O}}_4$
			569.44	569.44	563.56
					685.56