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Investigates whether the physical properties of iron are consistent with the anisotropy in the earth's inner core. Forward models of the inner core on the basis of predictions on the elasticity of iron; Use of Slater-Koster total energy, tight-binding Hamiltonian in the calculations; Determination of single-crystal, elastic tensor of the phases of seismologic density of inner core.

Focuses on the measurement of iron elasticity to reveals that compressional waves traverse the inner core of the earth faster along near-polar paths than in equatorial plane. First-principles calculations of the structure and elasticity; Increase of axial ratio of iron at high temperatures.