Published March 1996 | Version v1
Report Open

Effects of higher-coordination shells in garnets detected by XAS at the Al K-edge

  • 1. Istituto Nazionale di Fisica Nucleare, Frascati (Italy). Lab. Nazionale di Frascati
  • 2. CNRS UMR 110, Laboratoire de Chimie des Solides, Nantes Cedex (France). Institut de materiaux de Nantes
  • 3. Rome Univ. 3 (Italy). Dipt. di Scienze Geologiche
  • 4. Camerino Univ. (Italy). Dipt. di Scienze della Terra
  • 5. Univ. Bayreuth, Bayreuth (Germany). Bayerisches Geoinstitut

Description

The aluminium 1 s x-ray-absorption spectra of a series of garnets, pyrope, almandine, spessartine and grossular, are compared to full multiple-scattering calculation using cluster models. An overall good agreement between experiment and calculation, extended also to the edge region,is obtained in the energy range in up to 60 e V above the threshold, provided cluster containing at least 40 atoms are used. The analysis of these garnet XAS spectra provides clear evidence on the effect of probe, XANES spectroscopy at the edge of low Z elements appears to be a perfect tool to investigate the role played by atoms located in higher-coordination shells

Availability note (English)

MF available from INIS under the Report Number.

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Additional details

Publishing Information

Imprint Pagination
13 p.
Report number
LNF-P--96-015

INIS

Country of Publication
Italy
Country of Input or Organization
Italy
INIS RN
28044567
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
ALUMINIUM; CLUSTER MODEL; MULTIPLE SCATTERING; X-RAY SPECTROSCOPY
Descriptors DEC
ELEMENTS; MATHEMATICAL MODELS; METALS; NUCLEAR MODELS; SCATTERING; SPECTROSCOPY