E. Bykova
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
E. Bykova has a total of 13 co-authors. Here are the top co-authors by number of shared publications:
- Ana Černok
Dipartimento di Matematica, Informatica e Geoscienze Università di Trieste Trieste Italy
1 shared publication C. Prescher
Center for Advanced Radiation Sources, University of Chicago, Chicago, USA
1 shared publication- Hanns-Peter Liermann
Deutsches Elektronen-Synchrotron DESY
1 shared publication I. A. Abrikosov
Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden
1 shared publicationJ. Tidholm
Department of Physics, Chemistry and Biology, Linköping University, Linköping, Sweden
1 shared publication- Leonid Dubrovinsky
University of Bayreuth
1 shared publication
Latest Publications
- Open Access
- 15 November 2018
- Published by Springer Nature in Nature Communications
- Vol. 9 (1) , 1-8
Metastable silica high pressure polymorphs as structural proxies of deep Earth silicate melts
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 Pauling’s rule, are connected through common faces. Our results suggest that possible silicate liquids in Earth’s lower mantle may have complex structures making them more compressible than previously supposed.
- 15 November 2018
- Published by Springer Nature in Nature Communications
- Vol. 9 (1) , 1-8
Open AccessMetastable silica high pressure polymorphs as structural proxies of deep Earth silicate melts
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 Pauling’s rule, are connected through common faces. Our results suggest that possible silicate liquids in Earth’s lower mantle may have complex structures making them more compressible than previously supposed.