Currently, biological methods compared with conventional chemical and physical methods, could be a preferable synthesis route due to environmentally friendly conditions, despite their lower speed of metal reduction, it does not require further stabilizing agents, because extracts themselves act as stabilizing and capping agents and the nano powders, prepared by biological methods, rendering a good antimicrobial activity. Rare earth (RE) doped lanthanum oxyfluorides (LaOF) have been widely used in high performance luminescent devices, magnets, catalysts and other functional materials based on...