Jr. Shi et al., RAMAN-SCATTERING STUDY OF ND4-ION MOTION AND STRUCTURAL PHASE-TRANSITIONS IN (ND4)(2)PBCL6(), Chinese Physics Letters, 13(5), 1996, pp. 394-396
Raman spectra of the internal,nodes of ND4+-ion in (ND4)(2)PbCl6 cryst
al have bees recorded in the temperature range of 5-300K. A new struct
ural Phase transition was observed at 34K because of deuterium effect.
Discontinuous behaviours of the internal,nodes of the ND4+-ion at thi
s temperature show that the structural transition is one of first orde
r.