Thermal conductivity of liquid iron alloy at core-mantle boundary conditions

Determine the thermal conductivity $k$ of the outer-core Fe-Ni-light-element liquid at $P \sim 1.36 \times 10^{12}\,\mathrm{dyn}/\mathrm{cm}^2$ and $T \sim 4000\,\mathrm{K}$. Ab initio calculations give $k$ of order $10^{7}\ \text{to}\ 2.5 \times 10^{7}\,\mathrm{erg}/(\mathrm{s}\,\mathrm{cm}\,\mathrm{K})$ while some laser-heated diamond-anvil measurements give values near $3 \times 10^{6}\,\mathrm{erg}/(\mathrm{s}\,\mathrm{cm}\,\mathrm{K})$. An answer is $k$ with about 20 percent uncertainty including light-element and electron-electron scattering contributions.

Concordant dynamic or static high-pressure transport measurements at core conditions and ab initio calculations including electron-electron scattering.