Synthesis of New Polytypic Modifications of Fe7C3 at 5.5 GPa

Synthesis of New Polytypic Modifications of Fe7C3 at 5.5 GPa

The results of experimental synthesis of carbide Fe 7 C 3 at 5.5 GPa are presented. It is found that carbide Fe 3 C and several polytypes of carbide Fe 7 C 3 are formed along with diamond during cooling of the system. It is considered that the Fe 7 C 3 phase is a component of the Earth’s inner core....

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Veröffentlicht in:Doklady earth sciences 2019-08, Vol.487 (2), p.957-959
Hauptverfasser: Chepurov, A. I., Gromilov, S. A., Sonin, V. M., Zhimulev, E. I., Sukhikh, A. S., Chepurov, A. A., Sobolev, N. V.
Format: Artikel
Sprache:eng
Schlagworte:
Cementite
Diamonds
Earth
Earth and Environmental Science
Earth core
Earth Sciences
Geochemistry
Iron carbides
Polytypes
Synthesis
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Zusammenfassung:The results of experimental synthesis of carbide Fe 7 C 3 at 5.5 GPa are presented. It is found that carbide Fe 3 C and several polytypes of carbide Fe 7 C 3 are formed along with diamond during cooling of the system. It is considered that the Fe 7 C 3 phase is a component of the Earth’s inner core. Our results indicate that polytypic carbide modifications could have been formed under natural conditions at relatively low pressures during differentiation of the Earth.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X19080191