[S-IT03_29PO1] Structure and dynamics of Earth and Planetary deep interiors

[SIT03-P02] ケイ酸塩ペロブスカイトの単結晶弾性

*福井 宏之¹、米田 明²、Shatskiy Anton³、筒井 智嗣⁴、Baron Alfred⁵ (1.兵庫県立大学大学院物質理学研究科、2.岡山大学地球物質科学研究センター、3.V.S. Sobolev Institute of Geology and Mineralogy, Russian Academy of Science, Siberian Branch、4.高輝度光科学研究センター、5.理化学研究所バロン物質ダイナミクス研究室)

キーワード：silicate perovskite, single-crystal elasticity, the lower mantle, inelastic x-ray scattering

Information of single-crystal elasticity of silicate perovskite is essential for comprehensive understanding of the lower mantle. We have measured single-crystal elastic property of Mg_1-xFe_xSiO₃ perovskite (x = 0 or 0.035) by means of inelastic x-ray scattering at the ambient condition. The present results show relatively low values compared to previous reports for the iron free sample. The effect of iron increases both adiabatic bulk modulus and shear modulus. Combining the present results with pressure and temperature derivatives reported in literature, the chemical composition of the lower mantle will be discussed.