Исследование фазовых переходов в кристаллах (Cs,NH-=SUB=-4-=/SUB=-)-=SUB=-4-=/SUB=-(HSO-=SUB=-4-=/SUB=-)-=SUB=-3-=/SUB=-(H-=SUB=-2-=/SUB=-PO-=SUB=-4-=/SUB=-)

Abstract

The crystals of solid solution (NH4,Cs)4(HSO4)3(H2PO4) were investigate by synchronous thermal analysis and polarization microscopy methods at heating with the purpose of studying phase transitions in these solid solutions. The temperatures of structural modifications are established, and it is shown that the replacement of Cs cations by NH4 in Cs4(HSO4)3(H2PO4) crystals leads to a decrease in the temperature of phase transformations.