Mg K-edge XANES of sepiolite and palygorskite



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Sánchez del Río, Manuel and Súarez Barrios, Mercedes and García Romero, Emilia and Alianelli, Lucia and Felici, Roberto and Martinetto, Pauline and Dooryhée, Eric and Reyes Valerio, Constantino and Borgatti, Francesco and Doyle, Bryan and Giglia, Angelo and Mahne, Nicola and Pedio, Maddalena and Nannarone, Stefano (2005) Mg K-edge XANES of sepiolite and palygorskite. Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms , 238 . pp. 55-60. ISSN 0168-583X

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We present a study of the Mg K-edge on sepiolite and palygorskite performed at the INFM BEAR beamline at Elettra
synchrotron light source (Trieste). These two clays, although having very similar structures, show some different
features in their near-edge. Mg is in octahedral coordination with oxygens, hydroxyl groups or water, for both palygorskite
and sepiolite. The differences found in the near-edge seem to reflect the fact that, on average, an Mg atom
in palygorskite ‘‘sees’’ less Mg in higher coordination shells than sepiolite.

Item Type:Article
Uncontrolled Keywords:Sepiolite; Palygorskite; Fibrous clay; X-ray absorption spectroscopy
Subjects:Sciences > Geology > Mineralogy
ID Code:13399
Deposited On:14 Oct 2011 10:16
Last Modified:11 Dec 2018 08:46

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