PRESSURE-INDUCED AMORPHIZATION OF WOLLASTONITE (CASIO3) AT ROOM-TEMPERATURE

Authors
SERGHIOU GC HAMMACK WS
Citation
Gc. Serghiou et Ws. Hammack, PRESSURE-INDUCED AMORPHIZATION OF WOLLASTONITE (CASIO3) AT ROOM-TEMPERATURE, The Journal of chemical physics, 98(12), 1993, pp. 9830-9834
Citations number
36
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
The Journal of chemical physics → ACNP
ISSN journal
00219606
Volume
98
Issue
12
Year of publication
1993
Pages
9830 - 9834
Database
ISI
SICI code
0021-9606(1993)98:12<9830:PAOW(A>2.0.ZU;2-G
Abstract
Energy dispersive x-ray diffraction and. Raman measurements show that the mineral wollastonite (CaSiO3) becomes amorphous at a pressure of 2 5.6 GPa at 300 K. A consideration of the high pressure/high temperatur e behavior of CaSiO3 shows that the amorphization occurs because the p hase transition wollastonite --> perovskite CaSiO3 is kinetically impe ded. We suggest that the amorphous phase may be viewed as a defective long-period modulated wollastonite phase.