Stability of KAlSi3O8 hollandite-type structure in the earth's lower mantle conditions
(2001) In Geophysical Research Letters 28(14). p.2735-2738- Abstract
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.
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- author
- Tutti, F. ; Dubrovinsky, L. S. ; Saxena, S. K. and Carlson, S. LU
- organization
- publishing date
- 2001-07-15
- type
- Contribution to journal
- publication status
- published
- in
- Geophysical Research Letters
- volume
- 28
- issue
- 14
- pages
- 4 pages
- publisher
- American Geophysical Union (AGU)
- external identifiers
-
- scopus:0035878280
- ISSN
- 0094-8276
- DOI
- 10.1029/2000GL012786
- language
- English
- LU publication?
- yes
- id
- 2baa230b-9d2f-4cb3-b917-bc5190d6d25f
- date added to LUP
- 2016-05-04 11:57:16
- date last changed
- 2022-04-16 08:58:04
@article{2baa230b-9d2f-4cb3-b917-bc5190d6d25f, abstract = {{<p>The stability of KAISi<sub>3</sub>O<sub>8</sub> 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. KAISi<sub>3</sub>O<sub>8</sub> 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.</p>}}, author = {{Tutti, F. and Dubrovinsky, L. S. and Saxena, S. K. and Carlson, S.}}, issn = {{0094-8276}}, language = {{eng}}, month = {{07}}, number = {{14}}, pages = {{2735--2738}}, publisher = {{American Geophysical Union (AGU)}}, series = {{Geophysical Research Letters}}, title = {{Stability of KAlSi<sub>3</sub>O<sub>8</sub> hollandite-type structure in the earth's lower mantle conditions}}, url = {{http://dx.doi.org/10.1029/2000GL012786}}, doi = {{10.1029/2000GL012786}}, volume = {{28}}, year = {{2001}}, }