Table 1

Density ρ, G, and the derivatives ofG from ultrasonic measurements of polycrystalline samples of MgSiO3 perovskite.

Data sourceρ (103kg/m3)G (GPa)(∂G/∂P)T−(∂G/∂T)P(10−2 GPa/K)
Sample 29974.03(2)175(12)1.8(1)3.0(1)
Sample 30204.06(2)176(5)1.9(3)2.9(2)
Sample 30814.10(2)174(7)1.8(4)2.8(3)
Other studies4.107* 177(4) 1.6–2.2 2.0–3.5§
  • * MgSiO3 x-ray density from Joint Commission on Powder Diffraction Standards card 341216.

  • MgSiO3single-crystal Brillouin-scattering measurements (6).

  • Elasticity systematics of ∂G/∂P versusK S/G for MgSiO3perovskite (15).

  • § Temperature-averaged ∂G/∂T values of the lower mantle (5).