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This article is cited in 6 scientific papers (total in 6 papers)
CONDENSED MATTER
First experimental synthesis of mg orthocarbonate by the MgCO$_3$ + MgO = Mg$_2$CO$_4$ reaction at pressures of the Earth's lower mantle
P. N. Gavryushkinab, N. S. Martirosyancd, S. V. Rashchenkoba, D. N. Sagatovaba, N. E. Sagatovab, A. I. Semerikovaab, T. M. Fedotenkoc, K. D. Litasove a Novosibirsk State University, Novosibirsk, 630090 Russia
b Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, Novosibirsk, 630090 Russia
c Bayerisches Geoinstitut, University of Bayreuth, Bayreuth, 95440 Germany
d Deutsches GeoForschungsZentrum (GFZ), Sec. 3.5 Interface Geochemistry, Telegrafenberg, Potsdam, 14473 Germany
e Vereshchagin Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow, 108840 Russia
Abstract:
Mg-carbonate is one of the main carbonates subducting from the Earth's surface into the mantle and possible reactions of this compound with the main mantle minerals determine the stability of carbonates into the Earth's mantle. Recently, we have theoretically shown that at pressures and temperatures of the Earth's lower mantle MgCO$_3$ should react with MgO, producing Mg2CO$_4$. Here, using diamond anvil cell technique, we have performed in situ investigation of the product of MgCO$_3$ + MgO reaction at pressures around 50 GPa and temperatures above 2000 K. Investigation of Raman and X-ray diffraction patterns unambiguously indicates that reaction has been realized and as the reaction product we suggest the modification similar to Mg$_2$CO$_4$-$P2_1/c$. Using the transmission electron microscopy technique, we show the presence of the new Mg-orthocarbonate/carbonate phase in the sample extracted from high-pressure environment.
Received: 23.08.2022 Revised: 31.08.2022 Accepted: 31.08.2022
Citation:
P. N. Gavryushkin, N. S. Martirosyan, S. V. Rashchenko, D. N. Sagatova, N. E. Sagatov, A. I. Semerikova, T. M. Fedotenko, K. D. Litasov, “First experimental synthesis of mg orthocarbonate by the MgCO$_3$ + MgO = Mg$_2$CO$_4$ reaction at pressures of the Earth's lower mantle”, Pis'ma v Zh. Èksper. Teoret. Fiz., 116:7 (2022), 472–480; JETP Letters, 116:7 (2022), 477–484
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https://www.mathnet.ru/eng/jetpl6773 https://www.mathnet.ru/eng/jetpl/v116/i7/p472
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Abstract page: | 49 | References: | 13 | First page: | 8 |
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