onr:"swepub:oai:DiVA.org:liu-153165"
Search: onr:"swepub:oai:DiVA.org:liu-153165" > Metastable silica h...
- 1 of 1
- Previous record
- Next record
- To hitlist
Metastable silica high pressure polymorphs as structural proxies of deep Earth silicate melts
-
- Bykova, E. (author)
- DESY, Germany; Univ Bayreuth, Germany
-
- Bykov, M. (author)
- Univ Bayreuth, Germany; Natl Univ Sci and Technol MISIS, Russia
-
- Cernok, A. (author)
- Univ Bayreuth, Germany; Open Univ, England
- show more...
- show less...
- (creator_code:org_t)
- 2018-11-15
- 2018
- English.
- In: Nature Communications. - : NATURE PUBLISHING GROUP. - 2041-1723. ; 9
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- Modelling of processes involving deep Earth liquids requires information on their structures and compression mechanisms. However, knowledge of the local structures of silicates and silica (SiO2) melts at deep mantle conditions and of their densification mechanisms is still limited. Here we report the synthesis and characterization of metastable high-pressure silica phases, coesite-IV and coesite-V, using in situ single-crystal X-ray diffraction and ab initio simulations. Their crystal structures are drastically different from any previously considered models, but explain well features of pair-distribution functions of highly densified silica glass and molten basalt at high pressure. Built of four, five-, and six-coordinated silicon, coesite-IV and coesite-V contain SiO6 octahedra, which, at odds with 3rd Paulings rule, are connected through common faces. Our results suggest that possible silicate liquids in Earths lower mantle may have complex structures making them more compressible than previously supposed.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
- Nature Communications (Search for host publication in LIBRIS)
To the university's database
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Bykova, E.
- Bykov, M.
- Cernok, A.
- Tidholm, Johan
- Simak, Sergey
- Hellman, Olle
- show more...
- Belov, M. P.
- Abrikosov, Igor
- Liermann, H. -P.
- Hanfland, M.
- Prakapenka, V. B ...
- Prescher, C.
- Dubrovinskaia, N ...
- Dubrovinsky, L.
- show less...
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Chemical Science ...
- and Materials Chemis ...
- Articles in the publication
- Nature Communica ...
- By the university
- Linköping University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
