Glasses Tech

March 8, 2010

Na K-edge XANES spectra of minerals and glasses

Filed under: Glasses 2004 — admin @ 6:36 am


Na K-edge X ray absorption near-edge structure (XANES) spectra for minerals and glasses were collected using synchrotron radiation. Na-K XANES is a good structural probe to determine the coordination state of this element in important minerals and glasses. From the XANES spectra on crystalline reference phases with different chemical environment, information can be obtained and compared with the structure of the minerals and glasses. The different classes of studied minerals correspond to distinct Na K-edge spectra which have been examined. The XANES spectra for the crystalline references are used as fingerprint to interpret those obtained on silicate and borate glasses. Experimental spectra for jadeite and carnegieite crystals can be satisfactorily reproduced by theoretical calculations using the Full Multiple Scattering formalism.

Daniel R. NEUVILLE1,*, Laurent CORMIER2, Anne-Marie FLANK3, Rogerio J. PRADO4 and Pierre LAGARDE3

1 Laboratoire de Physique des Minéraux et des Magmas, Institut de Physique du Globe, CNRS UMR 7047, 4 place Jussieu, 75005 Paris, France
2 Laboratoire de Minéralogie-Cristallographie de Paris, Universités Paris 6 et 7, CNRS UMR 7590, Institut de Physique du Globe, 4 place Jussieu, 75005 Paris, France
3 Laboratoire pour l’Utilisation du Rayonnement Electromagnétique, Bât. 209D, B.P.34, 91898 Orsay, France
4 Instituto de Fisica da USP, C.P. 66318, CEP 05315-970 Sao-Paulo – SP, Brazil

* Corresponding author, e-mail:

Key-words: sodium, minerals, glass, XANES.

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