High pressure‐temperature electrical conductivity of magnesiowustite as a function of iron oxide concentration

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書誌事項

公開日
1990-12-10
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/jb095ib13p21609
公開者
American Geophysical Union (AGU)

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説明

<jats:p>The electrical conductivity of (Mg,Fe)O magnesiowüstite containing 9 and 27.5 mol % FeO has been measured at simultaneously high pressures (30–32 GPa) and temperatures using a diamond anvil cell heated with a continuous wave Nd:YAG laser and an external resistance heater. The conductivity depends strongly on the FeO concentration at both ambient and high pressures. At the pressures and temperatures of about 30 GPa and 2000 K, conditions expected in the lower mantle, the magnesiowüstite containing 27.5% FeO is 3 orders of magnitude more conductive than that containing 9% FeO. The activation energy of magnesiowüstite decreases with increasing iron concentration from 0.38 (±0.09) eV at 9% FeO to 0.29 (±0.05) eV at 27.5% FeO.</jats:p>

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