Table 2.

XRD result of synthesis iron oxide nanoparticles by microemulsion- hydrothermal method at different temperatures and time.

Sample	Phase	Temp. (oC)	Time (h)	Crystal structure	Space group	ICDD card number	Average crystalline size (nm)
n1	Hematite	200	30 h	Rhombohedral	p-3	01-079-0007	27
n2	Maghemite	200	36 h	Tetragonal	P	01-076-1849	27