Table 2 Characteristic velocities for crystals of post-perovskite structure.

From: Elastic anisotropy of experimental analogues of perovskite and post-perovskite help to interpret D′′ diversity

 

V P , km s −1

V SH , km s −1

V SV , km s −1

VSH/VSV

Δ VS/VS

pPv-CaIrO3

 a–b plane

6.1 (5)

3.4 (1)

2.8 (2)

1.19

0.11

 b–c plane

6.1 (4)

3.1 (1)

2.9 (2)

1.06

0.07

 c–a plane

6.3 (3)

3.4 (6)

3.1 (1)

1.08

0.17

pPv-MgSiO3

 a–b plane

14.0 (6)

7.6 (3)

7.1 (3)

1.07

0.09

 b–c plane

13.9 (6)

7.2 (3)

7.4 (5)

0.98

0.07

 c–a plane

14.2 (3)

7.4 (6)

7.8 (2)

0.94

0.09

  1. VP, VSH and VSV are the average velocities of the P wave, SH wave and SV wave, respectively, on each plane specified on the left. ΔVS is the maximum difference between the SH-wave and SV-wave velocities, and VS is the average of VSH and VSV on the corresponding plane. The source data for pPv-CaIrO3 and pPv-MgSiO3 are the results of the present IXS study and theoretical computation10, respectively. The numbers in parentheses correspond to expected uncertainty.
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