K. GesiKunio OzawaToshio ÔsakaYasuharu Makita
The pressure-temperature phase diagram of (ND 4 ) 3 D(SO 4 ) 2 was determined in a pressure and temperature region of p <9 kbar and RT> T >-110^° C . Comparison with the phase diagram of (NH 4 ) 3 H(SO 4 ) 2 shows that two ferroelectric phases in (ND 4 ) 3 D(SO 4 ) 2 correspond to the pressure-induced phases VI and VII in (NH 4 ) 3 H(SO 4 ) 2 .
Daniil G. SannikovHiroyuki Mashiyama
Daniil G. SannikovHiroyuki Mashiyama
Daniil G. SannikovGrigorii A. KessenikhHiroyuki Mashiyama
П. П. ФедоровV. Yu. ProydakovaС. В. КузнецовВ. В. ВороновА. А. ПыненковК. Н. Нищев