Direct Production of a Novel Iron-Based Nanocomposite from the Laser Pyrolysis of Fe(CO)₅/MMA Mixtures: Structural and Sensing Properties

Table 2

Comparative XRD evaluation of some of the structural parameters of samples obtained from MMA/Fe(CO)₅ mixtures (network constants and Scherrer mean crystallite dimensions).

	Network constants							Crystallite dimensions (nm)				Obs.
Samples	Fe	𝛾-Fe2O3/Fe3O4	Fe3C			α-Fe2O3		Fe	𝛾-Fe2O3/Fe3O4	Fe3C	α Fe2O3
	a (Å)	a (Å)	a (Å)	b (Å)	c (Å)	a (Å)	c (Å)
MF03	2.866	8.399	—	—	—	—	—	9.7	2.0	—	—
MF04	2.867	8.397	—	—	—	—	—	9.4	2.0	—	—	Fe3C traces
MF06	2.852	8.394	—	—	—	—	—	10.8	1.6	—	—	Fe3C traces
MF08	—	8.401	—	—	—	—	—	—	1.9	—	—
MF09	—	8.370				—	—	8.8	1.8	—	—
MF10	2.859	8.391	5.065	6.614	4.522	—	—	13.6	2.1	17.6	—	Minor Fe3C
MF10h		8.35				5.02	13.71		12.4		31.5