Compressional and Shear-Wave Velocities of the Polycrystalline CaGeO3 Perovskite to 10 GPa
Journal Article
·
· Physical Review B: Condensed Matter and Materials Physics
Compressional and shear-wave velocities and unit-cell volumes of orthorhombic CaGeO{sub 3} perovskite have been measured up to 10GPa at ambient temperature using ultrasonic interferometry in conjunction with synchrotron x radiation. Fitting all velocity and unit-cell volume data to finite-strain equations yields the zero-pressure adiabatic bulk and shear moduli and their pressure derivatives K{sub S0}=194.6 (11)GPa, G{sub 0}=109.5 (5)GPa , KS0'=6.4 (2), G0'=1.7 (1), with an rms misfit of 0.009kms{sup -1} . From the data in the current study, we have observed no discontinuities or elasticity softening for either the bulk or shear moduli up to the peak pressure of 10GPa .
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
- Sponsoring Organization:
- Doe - Office Of Science
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 930496
- Report Number(s):
- BNL-80431-2008-JA; TRN: US0901401
- Journal Information:
- Physical Review B: Condensed Matter and Materials Physics, Vol. 75, Issue 2; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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