Why earth inner core doesn't melt despite extreme heat?

An energy distribution cycle keeps the core solid despite it being hotter than the surface of the Sun. ... Why Earth's inner core doesn't melt ... that on the edge of the inner core, pieces of crystals' structure continuously melt and diffuse only to be reinserted due to high pressure like “shuffling deck of cards.”. read more

Spinning within Earth's molten core is a mass of pure crystallised iron that is nearly the size of the moon. At Earth's core the pressure is 3.5 million times higher than surface pressure and temperatures are some 6,000°C (10,800°F) higher. read more