Structural Phase Transitions in CsPbCl₃ and RbCdCl₃

Abstract

Structural phase transitions in CsPbCl 3 and RbCdCl 3 have been investigated by 133 Cs and 87 Rb nuclear magnetic resonance. The space groups of the room temperature phase in CsPbCl 3 and of two unknown phases in RbCdCl 3 could be clarified. Thus both perovskites show the same phase sequence from cubic Pm3m -O 1 h to tetragonal P4/mbm -D 5 4h orthorhombic Cmcm -D 17 2h and further orthorhombic Pnma -D 16 2h .