STRUCTURE AND SUCCESSIVE PHASE-TRANSITIONS OF RGEBR(3) (R EQUALS ALKYLAMMONIUM) STUDIED BY MEANS OF NQR

Authors
OKUDA T GOTOU S TAKAHASHI T TERAO H YAMADA K
Citation
T. Okuda et al., STRUCTURE AND SUCCESSIVE PHASE-TRANSITIONS OF RGEBR(3) (R EQUALS ALKYLAMMONIUM) STUDIED BY MEANS OF NQR, Zeitschrift fur Naturforschung. A, A journal of physical sciences, 51(5-6), 1996, pp. 686-692
Citations number
7
Categorie Soggetti
Chemistry Physical",Physics
Journal title
Zeitschrift fur Naturforschung. A, A journal of physical sciences → ACNP
ISSN journal
09320784
Volume
51
Issue
5-6
Year of publication
1996
Pages
686 - 692
Database
ISI
SICI code
0932-0784(1996)51:5-6<686:SASPOR>2.0.ZU;2-K
Abstract
A series of tribromogermanate(II) complexes RGeBr(3) (R = CH3NH3, (CH3 )(2)NH2, (CH3)(4)N, C2H5NH3, (C2H5)(4)N) have been synthesized and cha racterized by Br-81 NQR, AC conductivity, DTA, and X-rax diffraction. These measurements revealed the presence of successive phase transitio ns in these complexes. The crystal structures of Phases I and II in (N H3)(4)NGeBr3 were derived from the Rietveld analysis of powder X-ray d iffraction. The electric conductivity was considerably high in CH3NH3G eBr3 and (NH3)(4)NGeBr3. The conduction mechanism is discussed on the basis of Br-81 NQR spin-lattice relaxation times and crystal structure s.