Study of luminescence, color and paramagnetic centers properties of albite

Study of luminescence, color and paramagnetic centers properties of albite

Author Cano, Nilo Francisco Autor UNIFESP Google Scholar
Santos, Lara H. E. dos Google Scholar
Chubaci, Jose F. D. Google Scholar
Watanabe, Shigueo Google Scholar
Institution Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Abstract A sample of natural albite, NaAlSi3O8, from the state of Minas Gerais, Brazil, has been investigated. the mineral is a solid solution of K-feldspar (4600 ppm - K) and Ca-feldspar (1100 ppm - Ca). the TL spectra of natural and the pre-annealed at high temperature albite presented a very intense band around 275 nm and weaker bands around 400 and 560 nm. Other TL properties have been investigated through monochromatic (275 nm and 400 nm) glow curves. the EPR spectrum measured at low temperature (77 K) shows the typical 11 lines signal due to Al-O--Al center superposed on Fe3+ signal around g = 2.0. the EPR spectra above 260 K show only g = 2.0 signal due to Fe3+ ions. (C) 2014 Elsevier B.V. All rights reserved.
Keywords Thermoluminescence
EPR
Optical absorption
Albite
Silicates
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Date 2015-02-25
Published in Spectrochimica Acta Part A-molecular and Biomolecular Spectroscopy. Oxford: Pergamon-Elsevier B.V., v. 137, p. 471-476, 2015.
ISSN 1386-1425 (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 471-476
Origin http://dx.doi.org/10.1016/j.saa.2014.08.085
Access rights Closed access
Type Article
Web of Science ID WOS:000347269900064
URI http://repositorio.unifesp.br/handle/11600/38773

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