TY - JOUR

T1 - Single-crystal elasticity of the rhodochrosite at high pressure by Brillouin scattering spectroscopy

AU - Zhao, Chaoshuai

AU - Li, Heping

AU - Chen, Pofei

AU - Jiang, Jianjun

AU - Liang, Wen

N1 - Publisher Copyright:
© 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.

PY - 2018/10/2

Y1 - 2018/10/2

N2 - The sound velocity properties of single-crystal rhodochrosite (MnCO3) were determined up to 9.7 GPa at ambient temperature by Brillouin scattering spectroscopy. Six elastic constants were calculated by a genetic algorithm method using the Christoffel's equations at each pressure. The elastic constants increased linearly as a function of pressure and its pressure derivatives ∂Cij/∂P for C11, C33, C44, C12, C13, C14 were 5.86 (±0.36), 3.82 (±0.44), 2.06 (±0.39), 5.07 (±0.27), 5.34 (±0.44), 1.52 (±0.24), respectively. Based on the derived elastic constants of rhodochrosite, the aggregate adiabatic bulk and shear moduli (Ks and G) were calculated using the Voigt-Reuss-Hill averages and the linear fitting coefficients (∂Ks/∂P)T and (∂G/∂P)T were 5.05(±0.26) and 0.73(±0.05), respectively. The aggregate Vp of rhodochrosite increased clearly as a function of pressure and its pressure derivative ∂Vp/∂P was 7.99(±0.53) × 10−2 km/(s GPa), while the aggregate Vs increased slowly and ∂Vs/∂P was only 1.19(±0.12) × 10−2 km/(s GPa). The anisotropy factor for As of rhodochrosite increased from ∼40% at 0.8 GPa to ∼48% at 9.7 GPa, while Ap decreased from ∼19% to ∼16% at the corresponding pressure.

AB - The sound velocity properties of single-crystal rhodochrosite (MnCO3) were determined up to 9.7 GPa at ambient temperature by Brillouin scattering spectroscopy. Six elastic constants were calculated by a genetic algorithm method using the Christoffel's equations at each pressure. The elastic constants increased linearly as a function of pressure and its pressure derivatives ∂Cij/∂P for C11, C33, C44, C12, C13, C14 were 5.86 (±0.36), 3.82 (±0.44), 2.06 (±0.39), 5.07 (±0.27), 5.34 (±0.44), 1.52 (±0.24), respectively. Based on the derived elastic constants of rhodochrosite, the aggregate adiabatic bulk and shear moduli (Ks and G) were calculated using the Voigt-Reuss-Hill averages and the linear fitting coefficients (∂Ks/∂P)T and (∂G/∂P)T were 5.05(±0.26) and 0.73(±0.05), respectively. The aggregate Vp of rhodochrosite increased clearly as a function of pressure and its pressure derivative ∂Vp/∂P was 7.99(±0.53) × 10−2 km/(s GPa), while the aggregate Vs increased slowly and ∂Vs/∂P was only 1.19(±0.12) × 10−2 km/(s GPa). The anisotropy factor for As of rhodochrosite increased from ∼40% at 0.8 GPa to ∼48% at 9.7 GPa, while Ap decreased from ∼19% to ∼16% at the corresponding pressure.

KW - Brillouin scattering

KW - elasticity

KW - high pressure

KW - rhodochrosite

KW - sound velocity

UR - http://www.scopus.com/inward/record.url?scp=85049888548&partnerID=8YFLogxK

U2 - 10.1080/08957959.2018.1497624

DO - 10.1080/08957959.2018.1497624

M3 - 期刊論文

AN - SCOPUS:85049888548

SN - 0895-7959

VL - 38

SP - 396

EP - 405

JO - High Pressure Research

JF - High Pressure Research

IS - 4

ER -