Abstract
The elastic moduli of single-crystal MgF 2 (rutile structure) have been measured ultrasonically to 7 kbars. Zero-pressure moduli are in good agreement with the results of others. The pressure derivative of the shear modulus c s = ( c 11 − c 12 )/2is−0.7 ± 0.1 which is consistent with the negative values also found in rutile-structure oxides. Estimates of the isotropic aggregate modulus derivatives are in good agreement with derivatives measured on polycrystalline aggregates by Rai and Manghnani. The calculated isotropic aggregate bulk modulus derivative is K ′ = 5.1 ± 0.2, which is lower than for the rutile-structure oxides, and comparable to that for other fluorides. More covalent bonding may increase the value of K ′, and hence the value for stishovite (SiO 2 , rutile) may be quite high.
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.
