Study of luminescence, color and paramagnetic centers properties of albite

Nilo F Cano; Lara H E dos Santos; Jose F D Chubaci; Shigueo Watanabe

doi:10.1016/j.saa.2014.08.085

Study of luminescence, color and paramagnetic centers properties of albite

Spectrochim Acta A Mol Biomol Spectrosc. 2015 Feb 25:137:471-6. doi: 10.1016/j.saa.2014.08.085. Epub 2014 Sep 3.

Authors

Nilo F Cano¹, Lara H E dos Santos², Jose F D Chubaci², Shigueo Watanabe²

Affiliations

¹ Instituto de Física, Universidade de São Paulo, Rua do Matão, Travessa R, 187, CEP 05508-090, São Paulo, SP, Brazil; Departamento de Ciências do Mar, Universidade Federal de São Paulo, Av. Alm. Saldanha da Gama, 89, CEP 11030-400, Santos, SP, Brazil. Electronic address: nilo.cano@unifesp.br.
² Instituto de Física, Universidade de São Paulo, Rua do Matão, Travessa R, 187, CEP 05508-090, São Paulo, SP, Brazil.

PMID: 25238186
DOI: 10.1016/j.saa.2014.08.085

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 (77K) shows the typical 11 lines signal due to Al-O(-)-Al center superposed on Fe(3+) signal around g=2.0. The EPR spectra above 260 K show only g=2.0 signal due to Fe(3+) ions.

Keywords: Albite; EPR; Optical absorption; Silicates; Thermoluminescence.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Aluminum / chemistry
Brazil
Color
Electron Spin Resonance Spectroscopy*
Gamma Rays
Luminescence
Minerals / chemistry*
Spectrometry, X-Ray Emission
Temperature
X-Ray Diffraction

Substances

Minerals
Aluminum