Collapsing cristobalitelike structures in silica analogues at high pressure

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DOIResolve DOI: http://doi.org/10.1103/PhysRevLett.91.015503
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TypeArticle
Journal titlePhysical Review Letters
Volume91
Issue1
Pages015503015506; # of pages: 4
AbstractThe cristobalitelike forms of the ternary silica analogues BPO4 and BAsO4 were investigated at high pressure by x-ray diffraction and theoretical methods. The behavior of these compounds represents an extreme case in which the tilt angle of the constituent tetrahedra increases in a spectacular way at high pressure resulting in a major change in topology from a cristobalitelike framework towards a �collapsed cristobalite� structure. These compounds provide the first examples of the collapse of a framework structure to a close-packed form in a continuous manner without an intervening phase transition.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedNo
NPARC number12326986
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Record identifier8525a822-25cf-4a35-a467-e6eaf9dd5a68
Record created2009-09-10
Record modified2016-05-09
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