Solvents for growing Al2(WO4)3 single crystals from high-temperature solutions

The crystallization conditions of Al2(WO4)3 from Li2O–WO3 solvents (molar ratio 30.0:70.0, 32.5:67.5, 35.0:65.0, 45.0:55.0 and 55.0:45.0) as well as from Na2O–WO3 solvents (molar ratio 25.0:75.0, 27.5:72.5, 30.0:70.0 and 32.5:67.5) have been investigated. The concentration and temperature regions of crystallization of Al2(WO4)3 and the density, viscosity as well as the solution losses due to evaporation have been established. On the basis of the data obtained it has been concluded that the most suitable solvent for growing Al2(WO4)3 single crystals is Na2O–WO3 with a molar ratio of 27.5:72.5.