HIGH-TEMPERATURE EXAFS IN CONTACTLESS CONDITIONS AT THE K-EDGES OF GAAND Y ON SOLID AND LIQUID LN(3)A(5)O(12) GARNETS (LN = Y, A = AL, GA)

Authors
LAUNAY X GAUTIER N RUFFIER D LANDRON C COUTURES JP BAZIN D
Citation
X. Launay et al., HIGH-TEMPERATURE EXAFS IN CONTACTLESS CONDITIONS AT THE K-EDGES OF GAAND Y ON SOLID AND LIQUID LN(3)A(5)O(12) GARNETS (LN = Y, A = AL, GA), Comptes rendus de l'Academie des sciences. Serie II. Mecanique, physique, chimie, astronomie, 324(8), 1997, pp. 527-535
Citations number
18
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Comptes rendus de l'Academie des sciences. Serie II. Mecanique, physique, chimie, astronomie → ACNP
ISSN journal
12518069
Volume
324
Issue
8
Year of publication
1997
Pages
527 - 535
Database
ISI
SICI code
1251-8069(1997)324:8<527:HEICCA>2.0.ZU;2-O
Abstract
We present here a new high temperature cell developed for in-situ stru ctural experiments, in contactless conditions, by X-ray absorption on solids or liquid samples. The aerodynamic levitated sample is heated w ith a CO6 laser, allowing us to reach temperatures higher than 2 000 d egrees C. EXAFS spectra at the K edges of Y and Ga in solid Y3Ga5O12 ( 1 700 degrees C just below the melting point) and in liquid Y3Al5O12 ( melting point 1 950 degrees C) up to 2 100 degrees C garnets are prese nted and discussed. The (Y-O) and (Ga-O) distances increase with the t emperature. At the Y3Al5O12 solid/liquid transition, the mean coordina tion number of Y decreases from 8 to 7.4.