Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/77843
Type: Artigo de periódico
Title: Theoretical and experimental investigation of the electron spin resonance of Co2+ in Zn-2(OH)PO4 and Mg-2(OH)AsO4
Author: Foglio, ME
dos Santos, MC
Barberis, GE
Rojo, JM
Mesa, JL
Lezama, L
Rojo, T
Abstract: Electron spin-resonance experiments were performed on Co2+ substituting for Zn2+ or Mg2+ in powder samples of Zn-2(OH)PO4 and Mg-2(OH)AsO4. These two compounds are iso-structural and contain the Co2+ in two environments with approximately octahedral and trigonal bipyramidal structures. The observed resonances are described using a theoretical model that considers the departures from the two perfect structures. It is shown that resonance in the penta-coordinated complex is allowed, and the crystal fields that would reproduce the resonance of the Co2+ in the two environments are calculated. The low intensity of the resonance in the penta-coordinated complex is explained by assuming that this site is much less populated than the octahedral one; this assumption was verified by a molecular calculation of the energies of the two environments, with both Co and Zn as central ions in Zn-2(OH)PO4.
Country: Inglaterra
Editor: Iop Publishing Ltd
Rights: fechado
Identifier DOI: 10.1088/0953-8984/14/8/329
Date Issue: 2002
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

Files in This Item:
File Description SizeFormat 
WOS000174564700038.pdf327.64 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.