Properties of iron at the Earth's core conditions

摘要: Summary. The phase diagram of iron up to 330 GPa is solved using the experimental data static high pressure (up 11 GPa) and shock wave 250 GPa). A solution for highest triple point found (P= 280 T= 5760 K) by imposing thermodynamic constraints points. This less than inner core–outer core boundary Earth. These results indicate that density at close 13 g cm−3, which lies seismic solutions Earth pressure. It thus concluded Earth's very likely be virtually pure in its hexagonal packed (hcp) phase. It shown four properties determined from seismology are value corresponding hcp conditions: density, bulk modulus, longitudinal velocity, Poisson's ratio. density–pressure profile conditions matches as methods, within spread values given recent models. This indicates slowly cooling, growing crystallization, impurities concentrated outer core. calculated temperature centre 6450 K.