M. PołωskaA. PawłowskiF. SmutnýJ. Wolak
Abstract Dielectric and optical investigations of (NH4)4LiH3(SO4)4 and (NH4)4LiH3(SeO4)4 single crystals showed that these crystals are new ferroelastic below 233 K and 267 K respectively. X-ray studies demonstrated that above mentioned crystals are isomorphous with other representatives of Me4LiH3(XO4)4 family and undergo transition from paraelastic tetragonal (P41 or P43) to ferroelastic monoclinic (P21) phase.
Māris KniteW. SchranzA. FuithH. Warhanek
B. MrózP. PiskunowiczA. PawłowskiT. Krajewski
Toshiki KishimotoToshio ÔsakaM. KomukaeYasuharu Makita