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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Grishina, Svetlana, Kodera, Peter, Goryainov, Sergey, Oreshonkov A. S., Seryotkin, Yurii, Simko, Frantisek, Polozov, Alexander G.
Заглавие : Application of Raman spectroscopy for identification of rinneite (K3NaFeCl6) in inclusions in minerals
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-05-00682]; European Regional Development FundEuropean Union (EU) [ITMS 26240220086]; Vedecka Grantova Agentura MSVVaS SR a SAV [1/0313/20]
Место публикации : J. Raman Spectrosc. - 2020. - Vol. 51, Is. 12. - P.2505-2516. - ISSN 0377-0486, DOI 10.1002/jrs.6005. - ISSN 1097-4555(eISSN)
Примечания : Cited References: 55. - Russian Foundation for Basic Research, Grant/Award Numbers: 18-05-00682, 18-05-00682; European Regional Development Fund, Grant/Award Number: ITMS 26240220086; Vedecka Grantova Agentura MSVVaS SR a SAV, Grant/Award Number: 1/0313/20
Предметные рубрики: SALT MELT
IRON
DEPOSIT
FLUIDS
TRANSFORMATIONS
FERRIHYDRITE
Аннотация: Solid daughter phases in fluid and salt melt inclusions in minerals provide important clues to characterization of mineral‐forming processes. The analysis of the fluid inclusions often requires the exposure of the daughter minerals. Rinneite (K3NaFeCl6), which is a hygroscopic mineral, decomposes in air and cannot thus be identified by conventional methods. A combined approach has been applied for investigation of synthetic and natural rinneite to acquire its diagnostic Raman spectrum for a nondestructive identification. We used natural rinneite inclusions in halite, suitable for applying a complex of methods, to clear up the reference spectrum. Improved high‐resolution X‐ray diffraction (XRD) data obtained from natural rinneite inclusion are comparable with that of previously published, with similar unit cell dimensions. Polarized Raman spectra of natural inclusions were obtained using different geometries and polarization of the incident and scattered light. Interpretation of experimental Raman spectra was performed within the framework of lattice dynamics simulations and group analysis. Individual spectral bands are interpreted in terms of Raman‐active vibrational modes of K3NaFeCl6 structural units. Raman spectrum of synthetic rinneite with main peaks at 75, 91, 103, 143, 167, 171, 187, and 239 cm−1 agrees well with the spectra of rinneite inclusions in halite from the Nepa potash deposit and rinneite daughter minerals in salt melt inclusions hosted by quartz veinlets from the porphyry gold systems in the Central Slovakia Volcanic Field. This provides a firm basis for any future identification of this mineral worldwide, using nondestructive Raman spectroscopy.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ehrling S., Senkovska I., Bon V., Evans J. D., Petkov P., Krupskaya Y., Kataev V., Wulf T., Krylov A. S., Vtyurin A. N., Krylova S. N., Adichtchev S., Slyusareva E., Weiss M. S., Buchner B., Heine T., Kaskel S.
Заглавие : Crystal size: Versus paddle wheel deformability: Selective gated adsorption transitions of the switchable metal-organic frameworks DUT-8(Co) and DUT-8(Ni)
Место публикации : J. Mater. Chem. A. - 2019. - Vol. 7, Is. 37. - P.21459-21475. - ISSN 20507488 (ISSN), DOI 10.1039/c9ta06781g
Примечания : Cited References: 106. - The authors thank DFG (FOR 2433) for financial support. We thank HZB for the allocation of synchrotron radiation beam-time and financial support. PP, TW and TH used high performance facilities of ZIH Dresden. TW thanks the European Social Funds for Germany for a PhD fellowship.
Аннотация: Switchable pillared layer metal–organic frameworks M2(2,6-ndc)2(dabco) (DUT-8(M), M = Ni, Co, 2,6-ndc = 2,6-naphthalenedicarboxylate, dabco = 1,4-diazabicyclo-[2.2.2]octane, DUT – Dresden University of Technology) were synthesised in two different crystallite size regimes to produce particles up to 300 μm and smaller particles around 0.1 μm, respectively. The textural properties and adsorption-induced switchability of the materials, obtained from both syntheses, were studied by physisorption of N2 at 77 K, CO2 at 195 K and n-butane at 273 K, revealing pronounced differences in adsorption behavior for Ni and Co analogues. While the smaller nano-sized particles (50–200 nm) are rigid and show no gating transitions confirming the importance of crystallite size, the large particles show pronounced switchability with characteristic differences for the two metals resulting in distinct recognition effects for various gases and vapours. Adsorption of various vapours demonstrates consistently a higher energetic barrier for the “gate opening” of DUT-8(Co) in contrast to DUT-8(Ni), as the “gate opening” pressure for Co based material is shifted to a higher value for adsorption of dichloromethane at 298 K. Evaluation of crystallographic data, obtained from single crystal and powder X-ray diffraction analysis, showed distinct geometric differences in the paddle wheel units of the respective MOFs. These differences are further disclosed by solid-state UV-vis, FT-IR and Raman spectroscopy. Magnetic properties of DUT-8(Co) and DUT-8(Ni) were investigated, indicating a high-spin state for both materials at room temperature. Density functional theory (DFT) simulations confirmed distinct energetic differences for Ni and Co analogues with a higher energetic penalty for the structural “gate opening” transformation for DUT-8(Co) compared to DUT-8(Ni) explaining the different flexibility behaviour of these isomorphous MOFs.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Grishina S., Kodera P., Uriarte L. M., Oreshonkov A. S., Maximovich Y., Roginskii E. M., Imko F.
Заглавие : Application of Raman spectroscopy for identification of anhydrous CaCl2, KCaCl3 and K3NaFeCl6 in natural inclusions
Коллективы : Annual Meeting of the German Crystallographic Society, Deutschen Gesellschaft für Kristallographie, Jahrestagung
Место публикации : Zeitschrift für Kristallographie : Supplemente: 26 Jahrestagung Deutschen Gesellschaft für Kristallographie : abstracts. - 2018. - Vol. 38. - P.121. - ISBN 978-3-11-059599-4
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sinyakova E. F., Vasilyeva I. G., Oreshonkov A. S., Goryainov S. V., Karmanov N. S.
Заглавие : Formation of noble metal phases (Pt, Pd, Rh, Ru, Ir, Au, Ag) in the process of fractional crystallization of the CuFeS2 melt
Место публикации : Minerals. - 2022. - Vol. 12, Is. 9. - Ст.1136. - ISSN 2075163X (ISSN), DOI 10.3390/min12091136
Примечания : Cited References: 61. - This work was supported by the Russian Federation state assignment of Sobolev Institute of Geology and Mineralogy of SB RAS, Nikolaev Institute of Inorganic Chemistry SB RAS, and Kirensky Institute of Physics of Federal Research Center KSC SB RAS. The grant number is projects II.1.64. and 40330-2016-0001
Аннотация: The quasi-equilibrium directional crystallization of the melt composition (at. %): Cu 24.998, Fe 25.001, S 49.983, with Ag 0.002, Pd 0.003, Ru 0.004, Rh 0.006, and Au, Pt, Ir (each as 0.001) was carried out. The crystallized cylindrical ingot consisted of two primary zones and three secondary zones with different chemical and phase compositions. The compositions of the primary zones corresponded to high-temperature intermediate solid solution (zone I) and liquid enriched in sulfur (zone II). The compositions of the secondary zones corresponded to low-temperature intermediate solid solution and chalcopyrite (zone Ia), the same intermediate solid solution with chalcopyrite and bornite (zone Ib), and again with bornite, chalcocite, and idaite (zone II). We plotted the distribution curves of Fe, Cu, and S along the ingot, calculated the distribution coefficients of the components during directional crystallization, and clearly showed that, from the initial stoichiometric composition CuFeS2, the intermediate solid solution enriched in Fe and depleted in S is crystallized. Based on the data of directional crystallization and thermal analysis, a cross section was constructed in the intermediate solid solution-sulfide melt region of the Cu-Fe-S system. With solubility in the solid Cu-Fe sulfides lying below detection limit of scanning electron microscopy/energy-dispersive X-ray spectrometry (SEM/EDS), noble elements occurred as individual phases of a size more often <10 µm. They were identified as Ag, RuS2, PdS, Au* (an Au based alloy), (Rh, Ir, Ru)3S8, (Rh, Ir)3S8, Rh3S8, and (Cu, Fe)~2(Pt, Rh)1S~5 phases by electron microprobe. Based on ab initio calculations of crystal structure, electronic band structure, and lattice dynamics of idealized laurite RuS2 phase and the idealized Ir3S8, Rh3S8, and Ru3S8 phases, the interpretation of Raman spectrum of the cation-mixed (Ru, Rh, Ir)S2 sulfide was presented for the first time.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stolyar S. V., Chekanova L. A., Cheremiskina E. V., Yaroslavtsev R. N., Taran O. P., Borovkova V. S., Malyar Y. N., Neznakhin D. S., Komogortsev S. V.
Заглавие : Synthesis of transition metal coatings using arabinogalactan
Место публикации : Bull. Russ. Acad. Sci. Phys. - 2022. - Vol. 86, Is. 5. - P.597-600. - ISSN 10628738 (ISSN), DOI 10.3103/S1062873822050264
Примечания : Cited References: 19. - The study was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory, and the Krasnoyarsk Regional Science Foundation (project no. 20-43-240003)
Аннотация: Carbon-containing transition metal (Fe, Co, Ni) coatings are synthesized via chemical deposition with arabinogalactan. The crystal structure and chemical composition of the coatings are determined. Data from magnetometry and X-ray diffraction show that carbon is not included in the crystal lattice of a metal. Instead, it exists in the form of graphite inclusions. Degradation of arabinogalactan in an alkaline medium on the surface of a galvanic pair is investigated.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Grishina, Svetlana, Goryainov, Sergey, Oreshonkov A. S., Karmanov, Nikolay
Заглавие : Micro-Raman study of cesanite (Ca2Na3(OH)(SO4)3) in chloride segregations from Udachnaya-East kimberlites
Коллективы : International GeoRaman Conference
Место публикации : J. Raman Spectrosc. - 2022. - Vol. 53, Is. 3: Special Issue: GEORAMAN 2020. - P.497-507. - ISSN 0377-0486, DOI 10.1002/jrs.6168. - ISSN 1097-4555(eISSN)
Примечания : Cited References: 33
Предметные рубрики: CARBONATE
IDENTIFICATION
INSIGHTS
APATITE
Аннотация: Cesanite (Ca2Na3(OH)(SO4)3), a rare mineral, has been found in a few places restricted to a geothermal field and caves. We report the new occurrence of cesanite in quite different geological site—within sulfate-rich melt inclusions in chloride segregations from kimberlites of Udachnaya-East pipe (Siberia). Two halite generations: сesanite free and сesanite-bearing, were distinguished in concentrically zonal segregations according to the results of the mineral and sulfate melt inclusion study by micro-Raman spectroscopy and SEM-EDS. We have applied the Raman spectroscopy and first principles calculations to understand structural and vibrational properties of cesanite daughter mineral in polyphase sulfate inclusions. Polarized spectra provided additional information on the overlapped components of the spectral profile. The Raman spectra of cesanite in the range of OH stretching vibrations are reported for the first time. The study aims to clarify the source of the NaSCl-enrichment in the Udachnaya-East pipe, which is highly discussed.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bataleva Yu. V., Palyanov Y .N., Sokol A. G., Borzdov Y. M., Bayukov O. A.
Заглавие : Wüstite stability in the presence of a CO2-fluid and a carbonate-silicate melt: Implications for the graphite/diamond formation and generation of Fe-rich mantle metasomatic agents
Место публикации : Lithos: Elsevier, 2016. - Vol. 244. - P.20-29. - ISSN 00244937 (ISSN), DOI 10.1016/j.lithos.2015.12.001
Примечания : Cited References: 68. - This work was supported by the Russian Science Foundation under grant no. 14-27-00054. The authors thank A. Moskalev for his assistance in the work preparation, A. Khokhryakov for useful suggestions throughout the study, and S. Ovchinnikov for his assistance in implementation of Mössbauer spectroscopy measurements. The authors thank editor M. Scambelluri, and two anonymous reviewers for their useful comments, which helped to profoundly improve the manuscript.
Предметные рубрики: EARTHS LOWER MANTLE
FERRIC IRON CONTENT
DIAMOND FORMATION
MINERAL INCLUSIONS
NATURAL DIAMOND
OXIDATION-STATE
DEEP MANTLECRUST
LITHOSPHERIC MANTLE
OXYGEN FUGACITY
OCEANIC-CRUST
Ключевые слова (''Своб.индексиров.''): wustite--co2-fluid--carbonate-silicate melt--decarbonation--graphite formation--hpht experiment
Аннотация: Experimental simulation of the interaction of wüstite with a CO2-rich fluid and a carbonate-silicate melt was performed using a multianvil high-pressure split-sphere apparatus in the FeO-MgO-CaO-SiO2-Al2O3-CO2 system at a pressure of 6.3GPa and temperatures in the range of 1150°C-1650°C and with run time of 20h. At relatively low temperatures, decarbonation reactions occur in the system to form iron-rich garnet (Alm75Prp17Grs8), magnesiowüstite (Mg#≤0.13), and CO2-rich fluid. Under these conditions, magnesiowüstite was found to be capable of partial reducing CO2 to C0 that leads to the formation of Fe3+-bearing magnesiowüstite, crystallization of magnetite and metastable graphite, and initial growth of diamond seeds. At T≥1450°C, an iron-rich carbonate-silicate melt (FeO~56wt.%, SiO2~12wt.%) forms in the system. Interaction between (Fe,Mg)O, SiO2, fluid and melt leads to oxidation of magnesiowüstite and crystallization of fayalite-magnetite spinel solid solution (1450°C) as well as to complete dissolution of magnesiowüstite in the carbonate-silicate melt (1550°C-1650°C). In the presence of both carbonate-silicate melt and CO2-rich fluid, dissolution (oxidation) of diamond and metastable graphite was found to occur. The study results demonstrate that under pressures of the lithospheric mantle in the presence of a CO2-rich fluid, wüstite/magnesiowüstite is stable only at relatively low temperatures when it is in the absolute excess relative to CO2-rich fluid. In this case, the redox reactions, which produce metastable graphite and diamond with concomitant partial oxidation of wüstite to magnetite, occur. Wüstite is unstable under high concentrations of a CO2-rich fluid as well as in the presence of a carbonate-silicate melt: it is either completely oxidized or dissolves in the melt or fluid phase, leading to the formation of Fe2+- and Fe3+-enriched carbonate-silicate melts, which are potential metasomatic agents in the lithospheric mantle. © 2015 Elsevier B.V.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bataleva, Yu. V., Palyanov, Yu. N., Borzdov, Yu. M., Bayukov O. A., Sobolev N. V.
Заглавие : Interaction of iron carbide and sulfur under P–T conditions of the lithospheric mantle
Коллективы : Russian Foundation for Basic Research [14-05-31061], Council for Grants and Support of the Leading Scientific Schools of the President of the Russian Federation [NSh 2024.2014.5]
Место публикации : Dokl. Earth Sci.: MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 463, Is. 1. - P.707-711. - ISSN 1028-334X, DOI 10.1134/S1028334X15070077
Примечания : This study was supported by the Russian Foundation for Basic Research (project no. 14-05-31061) and by the Council for Grants and Support of the Leading Scientific Schools of the President of the Russian Federation (NSh 2024.2014.5).
Предметные рубрики: MINERAL INCLUSIONS
DIAMOND
CARBON
EVOLUTION
CORES
Аннотация: Experimental studies were performed in the Fe3C–S system at P = 6.3 GPa, T = 900–1600°C, and t = 18–20 h. The study aimed to characterize the conditions of iron carbide stability in a reduced lithospheric mantle and to reveal the possibility of the formation of elemental carbon by the interaction of iron carbide and sulfur. It was found that the reaction at T 1200°C proceeds with the formation of a pyrrhotite–graphite assemblage by the following scheme: 2Fe3C + 3S2 → 6FeS + 2C0. The crystallization of graphite at T 1200°C is accompanied by the generation of sulfide and metal–sulfide melts and via 2Fe3C + 3S2 → 6[Fe–S(melt) + Fe–S–C(melt)] + 2C(graphite)0 reaction. Resulting from the carbon-generating reactions, not only graphite crystallized in sulfide or metal–sulfide melts, but the growth of diamond also takes place. The obtained data allow one to consider cohenite as a potential source of carbon in the processes of diamond and graphite crystallization under the conditions of a reduced lithospheric mantle. The interaction of iron carbide and sulfur under which carbon extraction proceeds may be one of possible processes of the global carbon cycle. © 2015, Pleiades Publishing, Ltd
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Altin S., Gokhfeld D. M.
Заглавие : Transformation of hysteresis loops of a superconductor with magnetic inclusions
Коллективы : Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism
Место публикации : V Euro-Asian simposium "Trend in MAGnetism": Nanomagnetism: abstracts. - Vladivostok: FEFU, 2013. - P.258. - ISBN 978-5-7444-3124-2
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bataleva, Yu. V., Palyanov, Yu. N., Borzdov, Yu. M., Novoselov I. D., Bayukov O. A., Sobolev N. V.
Заглавие : Conditions of formation of iron-carbon melt inclusions in garnet and orthopyroxene under P-T conditions of lithospheric mantle
Коллективы : Russian Foundation for Basic Research [16-35-60024]; [0330-2016-0007]
Место публикации : Petrology. - 2018. - Vol. 26, Is. 6. - P.565-574. - ISSN 0869-5911, DOI 10.1134/S0869591118060024. - ISSN 1556-2085(eISSN)
Примечания : Cited References: 45. - This work was supported by the Russian Foundation for Basic Research (project no. 16-35-60024) and a State Assignment (project no. 0330-2016-0007).
Предметные рубрики: EARTHS LOWER MANTLE
DIAMOND FORMATION
DEEP MANTLE
PHYSICOCHEMICAL PARAMETERS
Ключевые слова (''Своб.индексиров.''): high-pressure experiment--metal-carbon melt--graphite--diamond--co2-fluid--mantle silicates--mantle metasomatism
Аннотация: Of great importance in the problem of redox evolution of mantle rocks is the reconstruction of scenarios of alteration of Fe0- or Fe3C-bearing rocks by oxidizing mantle metasomatic agents and the evaluation of stability of these phases under the influence of fluids and melts of different compositions. Original results of high-temperature high-pressure experiments (P = 6.3 GPa, T = 1300–1500°С) in the carbide–oxide–carbonate systems (Fe3C–SiO2–(Mg,Ca)CO3 and Fe3C–SiO2–Al2O3–(Mg,Ca)CO3) are reported. Conditions of formation of mantle silicates with metallic or metal–carbon melt inclusions are determined and their stability in the presence of CO2-fluid representing the potential mantle oxidizing metasomatic agent are estimated. It is established that garnet or orthopyroxene and CO2-fluid are formed in the carbide–oxide–carbonate system through decarbonation, with subsequent redox interaction between CO2 and iron carbide. This results in the formation of assemblage of Fe-rich silicates and graphite. Garnet and orthopyroxene contain inclusions of a Fe–C melt, as well as graphite, fayalite, and ferrosilite. It is experimentally demonstrated that the presence of CO2-fluid in interstices does not affect on the preservation of metallic inclusions, as well as graphite inclusions in silicates. Selective capture of Fe–C melt inclusions by mantle silicates is one of the potential scenarios for the conservation of metallic iron in mantle domains altered by mantle oxidizing metasomatic agents.
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