Ym. Seo et al., COMPARISON OF CL-35 NQR SPECTRA BETWEEN THE MIXED-CRYSTALS K2SN1-XREXCL6 AND THE AL3-AL3+( DOPED CRYSTALS K2SNCL6), Zeitschrift fur Naturforschung. A, A journal of physical sciences, 53(6-7), 1998, pp. 552-558
Cl-35 Nuclear Quadrupole Resonance (NQR) has provided a valuable tool
for investigating the local structure in mixed crystals K2Sn1-xRexCl6
and Al3+ doped crystals K2SnCl6:Al3+. The measured NQR line shapes and
relaxation times of both kinds of impurity containing crystals in the
cubic phase of the host K2SnCl6 show markedly different impurity effe
cts; static impurity effects in K2Sn1-xRexCl6 and dynamic effects in K
2SnCl6:Al3+. The Cl-35 NQR spectra of K2SnCl6:Al3+ near the transition
temperature (T-c) indicate the presence of pretransition of the local
structure in the high temperature cubic phase.