  For the first time the quantum dots CsPbX_3 (X=Cl, Br, I) in the
fluorophosphate glasses were prepared. The samples were precipitated by two
methods:(i) through self-crystallization during cooling of the glass melt and
(ii) heat treatment of the glass. Controlled formation of CsPbX_3 quantum dots
was realized by adjustment of cooling rate and heat-treatment conditions. The
X-ray diffraction data was confirmed CsPbCl_3(Br_3, I_3) quantum dots
formation. It was shown that, CsPbX_3 (X=Cl, I) quantum dots are formed in a
cubic modification, while CsPbBr_3 in orthorhombic one. The photoluminescence
of quantum dots have high intensity with quantum yield 45-50% and narrow band
emission. The combined introduction of two anions (Cl/Br and Br/I) led to the
simultaneous formation of two types of quantum dots, and indicates the
difficulty of the anion exchange.
