Аннотация:Experimental data on the solubility of the Zr0.5Hf0.5SiO4 solid solution in an aluminosilicate melt at temperatures of 800°C and 1000°C for pressures of 200 and 400 MPa in dry conditions and in the presence of water are obtained. The starting material was fused granite glass of different agpaiticity, as well as a solid solution of the composition: Zr0.5Hf0.5Si04, synthesized by the solution-melt method. It has been established that in water-containing melts, with increasing agpaiticity, the content of ∑ (ZrO2+HfO2) in the glass increases. Under dry conditions, a halo with increased alkalinity and increased content of (ZrO2 + HfO2) is formed around the Zr0.5Hf0.5SiO4 crystals. Under the studied parameters, the formation of alkali zirconium silicate crystals is observed in the glass.
