Flux crystallization of trigonal GdFe3(BO3)4 competing with the crystallization of α-Fe2O3

Abstract
The formation of trigonal GdFe3(BO3)4 crystals in the Bi2Mo3O12-B2O3-Li2MoO4-Gd2O3-Fe2O3 system was studied. The flux compositions for which GdFe3(BO3)4 is the high-temperature phase with a wide range of crystallization were determined. The features of nucleation of these crystals and their growth near the phase boundary with α-Fe2O3 were analyzed. The growth of GdFe3(BO3)4 single crystals involving preliminary nonequilibrium crystallization of α-Fe2O3 is described.

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