Abstract
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.
Original language | English |
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Pages (from-to) | 55-60 |
Number of pages | 6 |
Journal | Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms |
Volume | 238 |
Issue number | 1-4 |
DOIs | |
Publication status | Published - Aug 2005 |
Externally published | Yes |
Event | Synchrotron Radiation in Materials Science Proceedings of the 4th Conference on Synchrotron Radiation in Materials Science - Duration: 23 Aug 2004 → 25 Aug 2004 |
Keywords
- Fibrous clay
- Palygorskite
- Sepiolite
- X-ray absorption spectroscopy
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Instrumentation