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Dynamic compression of SiO 2 : A new interpretation
Author(s) -
Akins Joseph A.,
Ahrens Thomas J.
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2002gl014806
Subject(s) - stishovite , coesite , cristobalite , quartz , materials science , mineralogy , porosity , tridymite , geology , rutile , composite material , paleontology , eclogite , subduction , tectonics
In light of recent discoveries of post‐stishovite phases of SiO 2 , with the CaCl 2 and α‐PbO 2 structures, we have reassigned the regimes along the Hugoniots for initial quartz, coesite, cristobalite, porous coesite, and fused silica. Calculated Hugoniots for fused silica, cristobalite and porous coesite indicate transition to stishovite, and then melt. Hugoniots for crystal quartz and coesite indicate that transition occurs to stishovite, then the CaCl 2 structure and finally to melt.