Issue |
Europhys. Lett.
Volume 37, Number 8, March II 1997
|
|
---|---|---|
Page(s) | 553 - 558 | |
Section | Condensed matter: structure, thermal and mechanical properties | |
DOI | https://doi.org/10.1209/epl/i1997-00190-3 | |
Published online | 01 September 2002 |
Theory of SiO2 polymorphs
1
Institute of Physics, Rostov State University - 344090, Rostov on Don, Russia
2
Department of Physics, University of Amiens - 33 rue Saint-Leu, 80039 Amiens, France
3
Department of Earth Science, University of Cambridge - Cambridge, CB23EQ, UK
Received:
6
January
1997
Accepted:
6
February
1997
The ordered structures of are shown to derive from a common parent
disordered BCC structure having different fractional concentrations of
molecules. This result gives an insight on the pressure-induced
amorphisation mechanism of α-quartz and coesite.
PACS: 61.50.Ks – Crystallographic aspects of phase transformations; pressure effects / 64.60.Cn – Order-disorder transformations; statistical mechanics of model systems / 81.30.Hd – Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder
© EDP Sciences, 1997
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