TY - JOUR
T1 - Structural phase transitions in [(CH3)4N]CdCl3 studied by the EPR of the [N(CH3)3]+ radicals
AU - Yu, Jiang Tsu
AU - Liu, Kuo Tung
AU - Jeng, Yng Huey
N1 - Funding Information:
Acknowledgement - The authors gratefully acknowledge the support given by the National Science Council of the Republic of China during the period of this work.
PY - 1994/2
Y1 - 1994/2
N2 - The hexagonal P63 m to monoclinic P21 m structural phase transition in [(CH3)4N]CdCl3 has been investigated by the electron paramagnetic resonance (EPR) of the [N(CH3)3]+ radicals produced by γ-irradiation. Above the transition temperature, this radical species exhibits axial symmetry, with the hexagonal c-axis as the symmetry axis. Below the phase transition, the magnetic symmetry departs significantly from axial symmetry. The apparent EPR proper rotation group in the monoclinic phase is the hexagonal C6, the same as in the hexagonal phase. This indicates the presence of merohedral twinning below the phase transition. The hexagonal c-axis becomes the unique twofold axis of the monoclinic phase, and there exist three types of twin-domains related by rotations of ±120° (or ±60°) about the c-axis.
AB - The hexagonal P63 m to monoclinic P21 m structural phase transition in [(CH3)4N]CdCl3 has been investigated by the electron paramagnetic resonance (EPR) of the [N(CH3)3]+ radicals produced by γ-irradiation. Above the transition temperature, this radical species exhibits axial symmetry, with the hexagonal c-axis as the symmetry axis. Below the phase transition, the magnetic symmetry departs significantly from axial symmetry. The apparent EPR proper rotation group in the monoclinic phase is the hexagonal C6, the same as in the hexagonal phase. This indicates the presence of merohedral twinning below the phase transition. The hexagonal c-axis becomes the unique twofold axis of the monoclinic phase, and there exist three types of twin-domains related by rotations of ±120° (or ±60°) about the c-axis.
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U2 - 10.1016/0038-1098(94)90753-6
DO - 10.1016/0038-1098(94)90753-6
M3 - Article
AN - SCOPUS:0037555757
SN - 0038-1098
VL - 89
SP - 543
EP - 547
JO - Solid State Communications
JF - Solid State Communications
IS - 6
ER -