The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Stability of KAlSi3O8 hollandite-type structure in the earth's lower mantle conditions

På svenska

Author

  • F. Tutti
  • L. S. Dubrovinsky
  • S. K. Saxena
  • S. Carlson

Summary, in English

The stability of KAISi3O8 hollandite-type structure is investigated in a series of synthesis experiments between 20 and 95 GPa at 650(±50) °C and between 1200 to 2300 °C, using electrically- and laser-heated diamond anvil cells, respectively. Potassium feldspar transformed to a hollandite-type structure in the experimental pressure range from 20 to 95 GPa at temperatures between 1200 to 2300 °C, whereas it remained amorphous at 65(±5) GPa and 650(±50) °C. KAISi3O8 hollandite is, therefore, a stable phase under the pressure and temperature conditions of at least 2200 km deep in the lower mantle and could be an important host for potassium in that region.

Department/s

Publishing year

2001-07-15

Language

English

Pages

2735-2738

Publication/Series

Geophysical Research Letters

Volume

28

Issue

14

Document type

Journal article

Publisher

American Geophysical Union (AGU)

Status

Published

ISBN/ISSN/Other

  • ISSN: 0094-8276