EPR theoretical study of local lattice structure on Mn2+ ion doped in calcite and differences between single crystal and fresh water snail, Pila globosa

Autor:	Xiong Yang, Hui Wang, Xiao-Ming Tan, Cheng-Guo Fu, Xiao-Yu Kuang
Rok vydání:	2006
Předmět:	Chemistry Doping General Physics and Astronomy Crystal structure Spectral line law.invention Ion Crystallography law Physical and Theoretical Chemistry Pila globosa Absorption (chemistry) Electron paramagnetic resonance Single crystal
Zdroj:	Chemical Physics Letters. 423:297-301
ISSN:	0009-2614
DOI:	10.1016/j.cplett.2006.03.089
Popis:	By diagonalizing the complete energy matrices for a d(5) configuration ion in a trigonal ligand-field and considering the second-order, fourth-order EPR parameters D and (a-F) simultaneously, the substitution position of Mn2+ ion in the CaCO3:Mn2+-system has been studied by analyzing the optical absorption and EPR spectra of single crystal and the ostracum layer of operculum of fresh water snail Pila globosa. The results show that in the single crystal there is an obvious compressed distortion Delta R = -0.158 angstrom and Delta theta = 0.70 degrees, and the distortion in P. globosa is Delta R = -0.107 angstrom and Delta theta = -0.34 degrees similar to -0.23 degrees. Meanwhile the EPR parameters 10(4) (a-F) = 7.02-7.29 cm(-1) and 10(4) a = 6.35 cm(-1) are predicted in P. globosa. (c) 2006 Elsevier B.V. All rights reserved.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::73c872488bf6ba634144b37145e6a410 https://doi.org/10.1016/j.cplett.2006.03.089 Zobrazit plný text záznamu Full Text from ScienceDirect