Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Anna Pakhomova"'
Autor:
Jeffrey P. Gay, Estelle E. Ledoux, Matthias Krug, Julien Chantel, Anna Pakhomova, Carmen Sanchez‐Valle, Sergio Speziale, Sébastien Merkel
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 11, Pp n/a-n/a (2024)
Abstract Seismic anisotropy is a powerful tool to map deformation processes in the deep Earth. Below 660 km, however, observations are scarce and conflicting. In addition, the underlying crystal scale mechanisms, leading to microstructures and crysta
Externí odkaz:
https://doaj.org/article/0955158a11a74c208b0fb05bf7fbdbee
Autor:
Matthias Krug, Morvarid Saki, Estelle Ledoux, Jeffrey P. Gay, Julien Chantel, Anna Pakhomova, Rachel Husband, Arno Rohrbach, Stephan Klemme, Christine Thomas, Sébastien Merkel, Carmen Sanchez‐Valle
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 23, Iss 10, Pp n/a-n/a (2022)
Abstract The coesite‐stishovite phase transition is considered the most plausible candidate to explain the X‐discontinuity observed at around 300 km depth in a variety of tectonic settings. Here, we investigate the microstructure in SiO2 across t
Externí odkaz:
https://doaj.org/article/b196574b061a49da82c601ff14c17f93
Autor:
Anna Pakhomova, Dariia Simonova, Iuliia Koemets, Egor Koemets, Georgios Aprilis, Maxim Bykov, Liudmila Gorelova, Timofey Fedotenko, Vitali Prakapenka, Leonid Dubrovinsky
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-8 (2020)
Feldspars are stable at pressures up to 3 GPa along the mantle geotherm, but they can persist metastably at higher pressures at colder conditions. Here, above 10 GPa the authors find new high-pressure polymorphs of feldspars that could persist at dep
Externí odkaz:
https://doaj.org/article/69caabb665f44cca99a030800ef2a138
Autor:
Maxim Bykov, Stella Chariton, Hongzhan Fei, Timofey Fedotenko, Georgios Aprilis, Alena V. Ponomareva, Ferenc Tasnádi, Igor A. Abrikosov, Benoit Merle, Patrick Feldner, Sebastian Vogel, Wolfgang Schnick, Vitali B. Prakapenka, Eran Greenberg, Michael Hanfland, Anna Pakhomova, Hanns-Peter Liermann, Tomoo Katsura, Natalia Dubrovinskaia, Leonid Dubrovinsky
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-8 (2019)
High pressure experiments may yield materials with unusual combinations of properties, but typically in small amounts and unstable. Here the authors synthesize millimeter-sized samples of metallic, ultraincompressible and very hard rhenium nitride pe
Externí odkaz:
https://doaj.org/article/ef157f0f2346433d95c67692d7922b61
Autor:
Anna Pakhomova, Georgios Aprilis, Maxim Bykov, Liudmila Gorelova, Sergey S. Krivovichev, Maxim P. Belov, Igor A. Abrikosov, Leonid Dubrovinsky
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-6 (2019)
Beryllium in inorganic compounds is usually coordinated to four oxygen atoms, but higher coordination numbers have been predicted. Here the authors observe a pressure induced stepwise transition in CaBe2P2O8 where Be coordination changes to trigonal-
Externí odkaz:
https://doaj.org/article/eab6ecc8106342fb9c1ab4241dec374d
A closer look into close packing: pentacoordinated silicon in a high-pressure polymorph of danburite
Autor:
Anna Pakhomova, Elena Bykova, Maxim Bykov, Konstantin Glazyrin, Biliana Gasharova, Hanns-Peter Liermann, Mohamed Mezouar, Liudmila Gorelova, Sergey Krivovichev, Leonid Dubrovinsky
Publikováno v:
IUCrJ, Vol 4, Iss 5, Pp 671-677 (2017)
Due to their high technological and geological relevance, silicates are one of the most studied classes of inorganic compounds. Under ambient conditions, the silicon in silicates is almost exclusively coordinated by four oxygen atoms, while high-pres
Externí odkaz:
https://doaj.org/article/3ef38a682c7940ed98f74359a093de39
Autor:
Georgios Aprilis, Anna Pakhomova, Stella Chariton, Saiana Khandarkhaeva, Caterina Melai, Elena Bykova, Maxim Bykov, Timofey Fedotenko, Egor Koemets, Catherine McCammon, Aleksandr I. Chumakov, Michael Hanfland, Natalia Dubrovinskaia, Leonid Dubrovinsky
Publikováno v:
Minerals, Vol 10, Iss 6, p 542 (2020)
It is widely accepted that the lower mantle consists of mainly three major minerals—ferropericlase, bridgmanite and calcium silicate perovskite. Ferropericlase ((Mg,Fe)O) is the second most abundant of the three, comprising approximately 16–20 wt
Externí odkaz:
https://doaj.org/article/298db0c27a584dc4b54deb5d01493c57
Publikováno v:
Cuestiones Políticas. 41:556-567
The article examined the prospects of state support for cluster support in the agrarian sphere and thus considers the factors causing external changes, along with the readiness to merge enterprises and the possibility of their stimulation by the stat
Autor:
Anna Semerikova, Artem D. Chanyshev, Konstantin Glazyrin, Anna Pakhomova, Alexander Kurnosov, Konstantin Litasov, Leonid Dubrovinsky, Timofey Fedotenko, Egor Koemets, Sergey Rashchenko
Publikováno v:
ACS Earth and Space Chemistry. 7:582-588
Publikováno v:
Revista Amazonia Investiga. 11:80-89
The article is devoted to the study of public relations in the agricultural sector as a direct object of state and legal regulation. This is characterized by several features, among which the most significant is the wide range of activities covered b