Keywords |
  • Geology


Magnesiowüstite is a mineral composing 20% of the lower mantle. It is a cubic phase of composition (Mg,Fe)O. It was assumed to exist because of the presence of a discontinuity in the propagation of seismic waves at a depth of 670 km. This discontinuity corresponds to the destabilisation of ringwoodite into magnesiowüstite and (Mg,Fe)SiO3. The presence of this ultra high pressure mineral was confirmed by laboratory tests using diamond presses.


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