Compressional and Shear-Wave Velocities of the Polycrystalline CaGeO3 Perovskite to 10 GPa

Journal Article · Mon Jan 01 04:00:00 EST 2007 · Physical Review B: Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.75.024107· OSTI ID:930496

Liu, W; Li, B

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 Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 930496
• Report Number(s): BNL--80431-2008-JA
• Journal Information: Physical Review B: Condensed Matter and Materials Physics, Journal Name: Physical Review B: Condensed Matter and Materials Physics Journal Issue: 2 Vol. 75; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
AMBIENT TEMPERATURE
ELASTICITY
INTERFEROMETRY
PEROVSKITE
POLYCRYSTALS
PRESSURE RANGE GIGA PA
SHEAR
SYNCHROTRON RADIATION
ULTRASONIC WAVES
VELOCITY
X RADIATION
national synchrotron light source