岡山大学 地球科学研究報告
Published by Okayama University Earth Science Reports Editorial Committee

Temperature dependence of elastic moduli of β-and γ-(Mg,Fe)2SiO4 : Supplements

Mayama, Norihito
Suzuki, Isao
Abstract
We measured the resonant frequencies for sphere specimens of the high pressure phases, β-and γ-(Mg0.91Fe0.09)2SiO4 from 298 to 470 K. The adibatic bulk modulus Ks and shear modulus μ at 298 K were determined to be Ks=165.72(6), μ=105.43(2) GPa for the β-phase, and Ks=185.1(2), μ=118.22(6) GPa for the γ-phase, respectively. The average slopes of the moduli at the measured temperature ranges were found to be ∂Ks/∂T=-0.175(3), ∂μ/∂T=-0.0159(1) GPaK-1 for the β-phase and ∂Ks/∂T=-0.193(6), ∂μ/∂T=-0.148(3) GPaK-1 for the γ-phase. The numerals in parentheses indicate probeble errors in the last place. In this technical report, we describe the observed frequencies and calcuation method to obtain elastic moduli, in details.
Keywords
Wadsleyite
Ringwoodite
Elastic moduli
ISSN
1340-7414
NCID
AN10506284
NAID