USING SOFT-X-RAY ABSORPTION-SPECTROSCOPY TO EXAMINE THE STRUCTURAL-CHANGES TAKING PLACE AROUND SI AND AL ATOMS IN KAOLINITE FOLLOWING FLASHCALCINATION

Authors
ROBERTS KJ ROBINSON J DAVIES TW HOOPER RM
Citation
Kj. Roberts et al., USING SOFT-X-RAY ABSORPTION-SPECTROSCOPY TO EXAMINE THE STRUCTURAL-CHANGES TAKING PLACE AROUND SI AND AL ATOMS IN KAOLINITE FOLLOWING FLASHCALCINATION, JPN J A P 1, 32, 1993, pp. 652-654
Citations number
12
Categorie Soggetti
Physics, Applied
Journal title
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS → ACNP
Volume
32
Year of publication
1993
Supplement
32-2
Pages
652 - 654
Database
ISI
SICI code
Abstract
Structural changes associated with the flash calcination of china clay (Al2O32SiO22H2O) have been investigated using soft X-ray absorption s pectroscopy (XANES and EXAFS) at the Al and Si K edges. The data revea l substantial changes to the atomic environment around the Al atomic s ites with a reduction of Al-O bond distances from 1.92 angstrom to 1.8 1 angstrom associated with a change from 6 to 4 coordination. The chan ges in the structural environment around Si are found to be more subtl e with Si remaining tetrahedrally coordinated.