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New State of Matter Discovered Deep Inside Earth
11 Dec
Summary
- Earth's inner core is in a 'superionic state', not a conventional solid.
- Carbon atoms flow like liquid through a solid iron lattice in this state.
- This state helps explain the inner core's pliable behavior and generates magnetic fields.
A groundbreaking study reveals that Earth's innermost core exists not as a simple solid, but in a novel 'superionic state.' This unique phase allows carbon atoms to move freely like a liquid within a stable iron framework, explaining the core's paradoxical combination of rigidity and pliability. This finding is a significant advancement in understanding our planet's deep interior.
The superionic state is crucial for maintaining Earth's magnetic fields. Researchers suggest that the fluid-like motion of elements within the core acts as a previously underestimated energy source for the geodynamo. This dynamic process, involving heat and compositional convection, powers the magnetic engine that protects our planet.
Experimental evidence, achieved by subjecting iron-carbon samples to extreme pressures and temperatures, supports this theory. The findings challenge older, static models of the inner core, proposing a more dynamic system. Future research could extend this understanding to exoplanetary interiors, unlocking further secrets of planetary evolution.
