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Exotic carbon microcrystals in meteoritic dust of the Chelyabinsk superbolide: experimental investigations and theoretical scenarios of their formation

Taskaev, Sergey ; Skokov, Konstantin P. ; Khovaylo, Vladimir ; Donner, Wolfgang ; Faske, Tom ; Dudorov, Alexander ; Gorkavyi, Nick ; Muratov, Dmitry S. ; Savosteenko, Galina ; Dyakonov, Alexander ; Baek, Woohyeon ; Kuklin, Artem ; Avramov, Pavel ; Gutfleisch, Oliver (2022)
Exotic carbon microcrystals in meteoritic dust of the Chelyabinsk superbolide: experimental investigations and theoretical scenarios of their formation.
In: The European Physical Journal Plus, 137 (5)
doi: 10.1140/epjp/s13360-022-02768-7
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

When a space body enters Earth’s atmosphere, its surface is exposed to high pressure and temperatures. The airflow tears off small droplets from the meteoroid forming a cloud of meteorite dust. Can new materials be synthesized in these unique conditions (high temperature, pressure, gaseous atmosphere, catalysts)? As a rule, meteoritic dust dissipates in the atmosphere without a trace or is mixed with terrestrial soil. The Chelyabinsk superbolide, the biggest in the twenty-first century, which exploded on February 15, 2013 above snowy fields of the Southern Urals, was an exception. The unique carbon crystals with a size of several micrometers, which were not observed before, were found during an in-depth study of the meteoritic dust. In order to explain the experimental findings, a multiple twin growth mechanism for the formation of closed shell graphite microcrystals was proposed based on DFT and classical/ab initio MD simulations. It was found that among several possible embryo carbon nanoclusters, the C60 fullerene and polyhexacyclooctadecane –C18H12– may be the main suspects, responsible for the formation of the experimentally observed closed shell quasi-spherical and hexagonal rod graphite microcrystals.

Typ des Eintrags: Artikel
Erschienen: 2022
Autor(en): Taskaev, Sergey ; Skokov, Konstantin P. ; Khovaylo, Vladimir ; Donner, Wolfgang ; Faske, Tom ; Dudorov, Alexander ; Gorkavyi, Nick ; Muratov, Dmitry S. ; Savosteenko, Galina ; Dyakonov, Alexander ; Baek, Woohyeon ; Kuklin, Artem ; Avramov, Pavel ; Gutfleisch, Oliver
Art des Eintrags: Bibliographie
Titel: Exotic carbon microcrystals in meteoritic dust of the Chelyabinsk superbolide: experimental investigations and theoretical scenarios of their formation
Sprache: Englisch
Publikationsjahr: 7 Mai 2022
Verlag: Springer
Titel der Zeitschrift, Zeitung oder Schriftenreihe: The European Physical Journal Plus
Jahrgang/Volume einer Zeitschrift: 137
(Heft-)Nummer: 5
DOI: 10.1140/epjp/s13360-022-02768-7
Kurzbeschreibung (Abstract):

When a space body enters Earth’s atmosphere, its surface is exposed to high pressure and temperatures. The airflow tears off small droplets from the meteoroid forming a cloud of meteorite dust. Can new materials be synthesized in these unique conditions (high temperature, pressure, gaseous atmosphere, catalysts)? As a rule, meteoritic dust dissipates in the atmosphere without a trace or is mixed with terrestrial soil. The Chelyabinsk superbolide, the biggest in the twenty-first century, which exploded on February 15, 2013 above snowy fields of the Southern Urals, was an exception. The unique carbon crystals with a size of several micrometers, which were not observed before, were found during an in-depth study of the meteoritic dust. In order to explain the experimental findings, a multiple twin growth mechanism for the formation of closed shell graphite microcrystals was proposed based on DFT and classical/ab initio MD simulations. It was found that among several possible embryo carbon nanoclusters, the C60 fullerene and polyhexacyclooctadecane –C18H12– may be the main suspects, responsible for the formation of the experimentally observed closed shell quasi-spherical and hexagonal rod graphite microcrystals.

Zusätzliche Informationen:

Paper No. 562

Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Funktionale Materialien
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung
Hinterlegungsdatum: 10 Aug 2022 07:26
Letzte Änderung: 06 Okt 2022 08:23
PPN: 498052028
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