MOSAIC CRYSTALS OF VANADYL PYROPHOSPHATE OBTAINED BY ORIENTED NUCLEATION AND GROWTH

Authors
DUVAUCHELLE N KESTEMAN E OUDET F BORDES E
Citation
N. Duvauchelle et al., MOSAIC CRYSTALS OF VANADYL PYROPHOSPHATE OBTAINED BY ORIENTED NUCLEATION AND GROWTH, Journal of solid state chemistry (Print), 137(2), 1998, pp. 311-324
Citations number
31
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Physical
Journal title
Journal of solid state chemistry (Print) → ACNP
ISSN journal
00224596
Volume
137
Issue
2
Year of publication
1998
Pages
311 - 324
Database
ISI
SICI code
0022-4596(1998)137:2<311:MCOVPO>2.0.ZU;2-1
Abstract
A study of the pseudomorphic transformation of the VOHPO4. 0.5H(2)O pr ecursor (P/V=1) to (VO)(2)P2O7 catalyst is reported. Attention is paid to the nucleation and growth stages, which are discussed in connectio n with the concept of topotaxy. The transformation mechanism which acc ounts for the textural change is established using electron microscopy techniques and S-ray diffraction. The morphology change to a prismati c shape at high temperature, approximately 870 degrees C, is also disc ussed. (C) 1998 Academic Press.