Structural phase transition and motion of ammonium ions in α-NH4HgCl3 and its deuterated analog
作者:T. Asaji
DOI:10.1016/s0038-1098(00)00234-9
日期:2000.7
the low-temperature phase of α-NH4HgCl3 as well as α-ND4HgCl3 is reported. From the invariance of the number of the resonance lines through the phasetransition, it is anticipated that the high-temperature space group P4/mmm is reduced to P42m at the low-temperature phase maintaining a tetragonal symmetry. The relaxation contribution due to a motion of the nearby ammoniumions was detected in the low-temperature