  The six nanosized PrF3 samples were synthesized using two different chemical
reactions and different time of hydrothermal reaction. The X-ray and HRTEM
experiments showed high crystallinity of synthesized samples. For all samples
the particles size distribution was obtained. It was shown, that precursors of
chemical reaction have influence on the shape of synthesized nanoparticles. The
size of nanoparticles depended on the time of hydrothermal reaction as much as
roughly 10 nm per hour.
