AI Insight
Research on magnesium oxide crystals found in Earth's deep mantle reveals that the method of applying pressure significantly affects the material's behavior and transformation. In super-Earths, higher pressures may cause magnesium oxide to transform into new high-pressure crystal structures or become a metallic, electrically conductive liquid capable of generating magnetic fields. In gas giant planets, magnesium oxide may exist within the planetary cores themselves.
Why it matters
Understanding how magnesium oxide behaves under different pressure conditions helps scientists model the internal structure and magnetic field generation of exoplanets and gas giants. This knowledge is crucial for determining planetary habitability and understanding planetary evolution in systems beyond our own.
Understand the Science
In the deepest region of the Earth’s mantle, just above the core, much of the material consists of crystals of magnesium oxide. In larger rocky exoplanets called super-Earths, the higher pressures in the lower mantle may drive magnesium oxide to transform into a new high-pressure crystal structure or a metallic, electrically conductive liquid that generates a magnetic field. And in gas giants, magnesium oxide could exist in the cores themselves.
Source: A mineral from the inside of planets reveals a surprising lesson: How you push matters