Crystal structure of the high-pressure monoclinic phase-II of cristobalite, SiO2

Authors
Dove, MT Craig, MS Keen, DA Marshall, WG Redfern, SAT Trachenko, KO Tucker, MG
Citation
Mt. Dove et al., Crystal structure of the high-pressure monoclinic phase-II of cristobalite, SiO2, MINERAL MAG, 64(3), 2000, pp. 569-576
Citations number
19
Categorie Soggetti
Earth Sciences
Journal title
MINERALOGICAL MAGAZINE
ISSN journal
0026461X → ACNP
Volume
64
Issue
3
Year of publication
2000
Pages
569 - 576
Database
ISI
SICI code
0026-461X(200006)64:3<569:CSOTHM>2.0.ZU;2-V
Abstract
The crystal structure of the high-pressure phase-II of cristobalite has bee n solved by neutron diffraction (space group P2(1)/c, a = 8.3780(11) Angstr om, b = 4.6018(6) Angstrom, c = 9.0568(13) Angstrom, beta = 124.949(7)degre es, at P = 3.5 GPa). This phase corresponds to a distortion of the high-tem perature cubic beta-phase, rather than of the ambient temperature and press ure tetragonal alpha-phase.