Elasticity of ScAlO3 at high pressure

J. Kung, S. Rigden, G. Gwanmesia

研究成果: Article同行評審

22 引文 斯高帕斯(Scopus)


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.

頁(從 - 到)65-75
期刊Physics of the Earth and Planetary Interiors
出版狀態Published - 2000 二月

All Science Journal Classification (ASJC) codes

  • 天文和天體物理學
  • 地球物理
  • 物理與天文學(雜項)
  • 空間與行星科學


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