| Issue |
Europhys. Lett.
Volume 42, Number 6, June II 1998
|
|
|---|---|---|
| Page(s) | 643 - 648 | |
| Section | Condensed matter: structure, thermal and mechanical properties | |
| DOI | https://doi.org/10.1209/epl/i1998-00299-3 | |
| Published online | 01 September 2002 | |
Melting and pressure-induced amorphization of quartz
1
Laboratoire de Sciences de la Terre,
École Normale Supérieure de Lyon, 46, allée d'Italie,
69364 Lyon cedex 07, France
2
Département de Physique des Matériaux,
Université Claude Bernard, Lyon I, 43, bd. du 11 novembre 1918,
69622 Villeurbanne cedex, France
Received:
4
September
1997
Accepted:
21
April
1998
It has recently been shown that amorphization and melting of ice
(O. Mishima, Nature, 384 (1996) 546) were intimately linked. In this letter,
we infer from molecular-dynamics simulations on the 
system that the
extension of the α-quartz melting line in the metastable
pressure-temperature domain is the pressure-induced amorphization
line. It seems therefore likely that melting is the physical phenomenon
responsible for pressure-induced amorphization. Moreover, we show that
the structure of a “pressure glass” is similar to that of a very
rapidly (1013 to 1014 kelvins per second) quenched thermal
glass.
PACS: 62.50.+p – High-pressure and shock-wave effects in solids and liquids / 61.20.-p – Structure of liquids / 64.70.Dv – Solid liquid transitions
© EDP Sciences, 1998
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