TY - JOUR
T1 - Elasticity of ScAlO3 at high pressure
AU - Kung, J.
AU - Rigden, S.
AU - Gwanmesia, G.
N1 - Funding Information:
Synthesis of ScAlO 3 was conducted at the Center for High Pressure Research, State University of New York, Stony Brook, New York, US and funded by the Research Foundation of the State University of New York, Stony Brook, New York, US and the Department of Industry, Science and Technology of Australia.
PY - 2000/2
Y1 - 2000/2
N2 - ScAlO3 is a close structural analogue for MgSiO3-perovskite in terms of its molar volume, structural distortion and compressional behavior. Polycrystalline specimens of ScAlO3 were synthesized in a 1000-ton multi anvil press at 10 GPa, 1470 K from two different starting materials; amorphous ScAlO3 and mixed oxides. Two well-sintered and fully-transformed specimens were recovered with low porosities of 0.5 and 1.7%. Elastic wave-speeds of these two specimens have been determined up to 3 GPa at room temperature. The results indicate that for these specimens, partial differential K/partial differential P = 3.8 and partial differential G/partial differential P = 1.9. The pressure derivatives of elastic moduli for the polycrystalline ScAlO3 specimens are expected to be reliable within 10% using this well-established ultrasonic technique. This is demonstrated by comparing determinations of the elasticity of polycrystalline Al2O3 with the available single crystal data. The values of partial differential M/partial differential P of ScAlO3 are consistent with those determined for MgSiO3 perovskite from X-ray P-V study and ultrasonic measurement.
AB - ScAlO3 is a close structural analogue for MgSiO3-perovskite in terms of its molar volume, structural distortion and compressional behavior. Polycrystalline specimens of ScAlO3 were synthesized in a 1000-ton multi anvil press at 10 GPa, 1470 K from two different starting materials; amorphous ScAlO3 and mixed oxides. Two well-sintered and fully-transformed specimens were recovered with low porosities of 0.5 and 1.7%. Elastic wave-speeds of these two specimens have been determined up to 3 GPa at room temperature. The results indicate that for these specimens, partial differential K/partial differential P = 3.8 and partial differential G/partial differential P = 1.9. The pressure derivatives of elastic moduli for the polycrystalline ScAlO3 specimens are expected to be reliable within 10% using this well-established ultrasonic technique. This is demonstrated by comparing determinations of the elasticity of polycrystalline Al2O3 with the available single crystal data. The values of partial differential M/partial differential P of ScAlO3 are consistent with those determined for MgSiO3 perovskite from X-ray P-V study and ultrasonic measurement.
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U2 - 10.1016/S0031-9201(99)00128-4
DO - 10.1016/S0031-9201(99)00128-4
M3 - Article
AN - SCOPUS:0034013718
SN - 0031-9201
VL - 118
SP - 65
EP - 75
JO - Physics of the Earth and Planetary Interiors
JF - Physics of the Earth and Planetary Interiors
IS - 1-2
ER -