Compressional and shear-wave velocities of the polycrystalline CaGeO{sub 3} 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:20976647

Wei, Liu; Baosheng, Li ^[1]

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1. Mineral Physics Institute, Stony Brook University, Stony Brook, New York 11794 (United States)

Compressional and shear-wave velocities and unit-cell volumes of orthorhombic CaGeO{sub 3} perovskite have been measured up to 10 GPa 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, K{sub S0}{sup '}=6.4 (2), G{sub 0}{sup '}=1.7 (1), with an rms misfit of 0.009 km s{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 10 GPa.

• OSTI ID: 20976647
• 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

42 ENGINEERING
AMBIENT TEMPERATURE
CALCIUM COMPOUNDS
ELASTICITY
GERMANIUM COMPOUNDS
INTERFEROMETRY
ORTHORHOMBIC LATTICES
PEROVSKITE
POLYCRYSTALS
PRESSURE DEPENDENCE
PRESSURE RANGE GIGA PA
PRESSURE RANGE MEGA PA 10-100
SHEAR
SYNCHROTRONS
ULTRASONIC TESTING
VELOCITY
X RADIATION