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#ringwoodite — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #ringwoodite, aggregated by home.social.

  1. At high pressures, fluorine-free topaz is stable: Topaz-OH. It's likely present only on recent Earth in our solar system: water, aluminous sediments (shales; pelites) from continental crust and cold subduction zones are all required.

    Given these, Topaz-OH can potentially transport water into the mantle transition zone (where it's stored in ) Figure from Huang et al (2020).

  2. is a second chance for (which lost out to earlier). Ringwoodite has the chemistry of olivine (Mg2SiO4) but the crystal structure of spinel (MgAl2O4).