Keywords |
  • Geology


Ringwoodite is a mineral from the mantle and some meteorites. It is an ultra high pressure olivine polymorph (Mg,Fe)2SiO4. Ringwoodite is a cubic mineral with a spinel structure. This compact structure means that ringwoodite is stable at 20 to 24 gigapascals (at a depth of 550 km to 670 km). Beyond these pressures ringwoodite decomposes into (Mg,Fe)SiO3 with a perovskite structure and into magnesiowüstite (Mg,Fe)O.


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