Abstract
The single-crystal elastic constants, the Raman and IR frequencies, the isotropic average of the elastic constants, and the first pressure derivatives of these quantities have been calculated for stishovite from a modified rigid ion model. In addition to Coulomb interaction, short-range repulsive interaction between first and second nearest neighbors and angle-bending forces for the oxygen-silicon-oxygen angles are included. The parameters of the model are determined from a least squares fit to the available zero-pressure elastic and optical data in the isostructural sequence SiO2, GeO2, and SnO2. The results for the isotropic bulk modulus and for the shear modulus are K = 3.145 Mbar and μ = 2.03 Mbar and for their pressure derivatives, (∂K/∂P) = 7.0 and (∂μ/∂P) = 1.13.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
