Likewise, the BCC iron retains its cubic structure," he said.. At low temperature BCC is unstable and crystalline planes slide out of the ideal BCC structure. Spinning within Earths molten core is a crystal ball - actually a mass formation of almost pure crystallised iron - nearly the size of the moon. However at extremely high pressure the crystalline structures transform into 12-point hexagonal forms, or a close packed (HCP) phase.Atoms are packed into variations of cubic, as well as hexagonal formations.This energy distribution cycle keeps the crystal stable and the core solid.Such a shuffling leads to an enormous increase in the distribution of molecules and Gas pressure gauge Factory energy - which leads to increasing entropy, or the distribution of energy states. "The instability kills the BCC phase at low temperature, but makes the BCC phase stable at high temperature," he added. At Earths core, where pressure is 3. "The sliding of these planes is a bit like shuffling a deck of cards. Even though the cards are put in different positions, the deck is still a deck.5 million times higher than surface pressure - and temperatures are some 6,000 degrees higher - scientists have proposed that the atomic architecture of iron must be hexagonal.Anatoly Belonoshko from KTH said data shows that pure iron likely accounts for 96 per cent of the inner cores composition, along with nickel and possibly light elements.

The study was published in the journal Nature Geosciences.Scientists have discovered why the crystallised iron core of the Earth remains solid, despite being hotter than the surface of the Sun. Understanding this strange, unobservable feature of our planet depends on knowing the atomic structure of these crystals - something scientists have been trying to do for years. At room-temperatures and normal atmospheric pressure, iron is in what is known as a body-centred cubic (BCC) phase, which is a crystal architecture with eight corner points and a centre point. As with all metals, the atomic-scale crystal structures of iron change depending on the temperature and pressure the metal is exposed to. But at high temperatures, the stabilisation of these structures begins much like a card game - with the shuffling of a "deck. Researchers at KTH Royal Institute of Technology in Sweden found 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".That, in turn, makes the BCC stable, he added." Belonoshko said that in the extreme heat of the core, atoms no longer belong to planes because of the high amplitude of atomic motion