Fig. 7From: Tiny Rare-Earth Fluoride Nanoparticles Activate Tumour Cell Growth via Electrical Polar InteractionsXRD spectra of a PrF3 and b LaF3 NPs. The mean surface area diameters of PrF3 and LaF3 NPs were ~ 23 ± 4 and ~ 15 ± 4 nm, respectivelyBack to article page