Table 2.

Calculated elastic properties of single-crystal hcp and bcc iron and for a cylindrically averaged bcc aggregate ()

Parameter	hcp*	bcc
c11, GPa	1,700.4	1,561.5	1,870.3
c12	1,251.5	1,448.1	1,345.2
c44	200.1	365.5	159.7
c13	1,025.0	—	1,242.3
c33	1,768.7	—	1,973.3
ρ, g/cm3	13.543	13.559	—
Vpo, km/s	10.9667	11.2760	—
δVp†	0.2955	−0.0138	—

^*Note that the hcp textural model is elastically indistinguishable from a single crystal.

^†Difference between the PREM velocity in the Earth’s center (11.2622 km/s) and the calculated V_po value.