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    A dielectric model at a frequency of 1.4GHz for frozen mineral soils in the temperature range −1 to −30°C / V. L. Mironov [и др.] // Progr. Electromag. Res. Symp. (PIERS) : Proceedings. - 2016. - P. 2518-2522, DOI 10.1109/PIERS.2016.7735031. - References: 5. - The study was supported by a grant from the Russian Foundation for Basic Research (project No. 16-05-00572)
   Перевод заглавия: Диэлектрическая модель на частоте 1,4 ГГц для мерзлых минеральных почв в температурном диапазоне от -1 до -30 °С
Аннотация: A single-frequency dielectric model at 1.4 GHz for frozen mineral soils was developed, with the temperature and clay content varying from -1 to -30°C and 9.1 to 41.3%, respectively. The model is based on dielectric measurements of three typical soils (sandy loam, silt loam, and silty clay) collected in the Yamal peninsular. The refractive mixing model was applied to fit the data aggregates consisting of measured complex refractive indexes (CRI) for the three soils as a function of soil moisture at a fixed temperature. As a result, there were derived the parameters of the refractive mixing dielectric model as a function of temperature and texture. These parameters involve the maximum allowed gravimetric fraction of bound water and the CRIs of soil solids, bound soil water, and free soil water components, the latter being represented by capillary ice. The error of the dielectric model was evaluated by correlating the predicted complex relative permittivity (CRP) values of the soil samples with the measured ones. The coefficient of determination, R2, and the root mean square error, RMSE, were estimated to be R2 = 0.994, RMSE = 0.22 and R2 = 0.988, RMSE = 0.07 for the real and imaginary parts of the CRP, respectively. These values are on the order of the dielectric measurement error itself. The proposed dielectric model can be applied in active and passive remote sensing techniques used in the Arctic areas, mainly for the SMOS, SMAP and Aquarius missions.

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Доп.точки доступа:
Mironov, V. L.; Миронов, Валерий Леонидович; Kosolapova, L. G.; Косолапова, Людмила Георгиевна; Lukin, Y. I.; Лукин, Юрий Иванович; Karavaysky, A. Yu.; Каравайский, Андрей Юрьевич; Molostov, I. P.; Молостов, Илья Петрович; Progress in Electromagnetics Research Symposium(37 ; 2016 ; Aug. ; 8-11 ; Shanghai, China)
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Application of Raman spectroscopy for identification of rinneite (K3NaFeCl6) in inclusions in minerals / S. Grishina, P. Kodera, S. Goryainov [et al.] // J. Raman Spectrosc. - 2020. - Vol. 51, Is. 12. - P. 2505-2516, DOI 10.1002/jrs.6005. - 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 . - ISSN 0377-0486. - ISSN 1097-4555

РУБ Spectroscopy
Рубрики:
SALT MELT
   IRON
   DEPOSIT
   FLUIDS
   TRANSFORMATIONS
   FERRIHYDRITE
Кл.слова (ненормированные):
daughter mineral -- Fe-oxyhydroxides -- fluid inclusion -- rinneite -- weathering
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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Держатели документа:
Russian Acad Sci, Sobolev Inst Geol & Mineral, Dept Mineral, Siberian Branch, Novosibirsk, Russia.
Comenius Univ, Dept Econ Geol, Fac Nat Sci, Bratislava, Slovakia.
Kirensky Inst Phys, Mol Spect Lab, Krasnoyarsk, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk, Russia.
Novosibirsk State Univ, Dept Geol, Novosibirsk, Russia.
Slovak Acad Sci, Inst Inorgan Chem, Bratislava, Slovakia.
Russian Acad Sci, Inst Geol Ore Deposits Petrog Mineral & Geochem, Moscow, Russia.

Доп.точки доступа:
Grishina, Svetlana; Kodera, Peter; Goryainov, Sergey; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Seryotkin, Yurii; Simko, Frantisek; Polozov, Alexander G.; 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]
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Conditions for diamond and graphite formation from iron carbide at the P-T parameters of lithospheric mantle / Y. V. Bataleva [et al.] // Russ. Geol. Geophys. - 2016. - Vol. 57, Is. 1 : Tectonics, geodynamics, and petrology of earth’s lithosphere and mantle (to the 80th birthday of Academician Nikolai Leontievich Dobretsov). - P. 176-189, DOI 10.1016/j.rgg.2016.01.012. - Cited References:55. - This work was supported by the Russian Science Foundation under Grant No. 14-27-00054. . - ISSN 1068-7971. - ISSN 1878-030X

РУБ Geosciences, Multidisciplinary
Рубрики:
DEEP CARBON-CYCLE
   EARTHS MANTLE
   MINERAL INCLUSIONS
   HIGH-PRESSURE
   KOKCHETAV MASSI
   SUBDUCTION ZONES
   REDOX BUDGET
   FERRIC IRON
   MOSSBAUER
   METAL
Кл.слова (ненормированные):
iron carbide -- wusite -- graphite -- diamond -- oxides -- olivine -- subduction -- redox interaction -- lithospheric mantle -- high-pressure experiment
Аннотация: To estimate conditions for the stability of iron carbide under oxidation conditions and to assess the possibility of formation of elemental carbon by interaction between iron carbide and oxides, experimental modeling of redox interaction in the systems Fe3C-Fe2O3 and Fe3C-Fe2O3-MgO-SiO2 was carried out on a split-sphere high-pressure multianvil apparatus at 6.3 GPa and 900-1600 degrees C for 18-20 h. During carbide-oxide interaction in the system Fe3C-Fe2O3, graphite crystallizes in assemblage with Fe3+-containing wusite. Graphite forms from carbide carbon mainly by cohenite oxidation: Fe3C + 3Fe(2)O(3) -> 9FeO + C-0 and FeO + Fe3C -> (Fe2+, Fe3+)O + C-0. At above-solidus temperatures (>= 1400 degrees C), when metal-carbon melt is oxidized by wusite, graphite and diamond crystallize by the redox mechanism and form the Fe3+-containing wstite + graphite/diamond assemblage. Interaction in the system Fe3C-Fe2O3-MgO-SiO2 results in the formation of Fe3+-containing mannesiowusite-olivine-graphite assemblage. At >= 1500 degrees C, two melts with contrasting f(O2) values are generated: metal-carbon and silicate-oxide; their redox interaction leads to graphite crystallization and diamond growth. Under oxidation conditions, iron carbide is unstable in the presence of iron, silicon, and magnesium oxides, even at low temperatures. Iron carbide-oxide interaction at the mantle temperatures and pressures leads to the formation of elemental carbon; graphite is produced from carbide carbon mainly by redox reactions of cohenite (or metal-carbon melt) with Fe2O3 and FeO as well as by interaction between metal-carbon and silicate-oxide melts. The results obtained suggest that cohenite can be a potential source of carbon during graphite (diamond) formation in the lithospheric mantle and the interaction of iron carbide with iron, silicon, and magnesium oxides, during which carbon is extracted can be regarded as a process of the global carbon cycle. (C) 2016, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved.

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Публикация на русском языке Условия образования графита и алмаза из карбида железа при Р, Т-параметрах литосферной мантии [Текст] / Ю. В. Баталева [и др.] // Геол. и геофиз. - 2016. - Т. 57 № 1. - С. 225-240

Держатели документа:
Russian Acad Sci, Siberian Branch, VS Sobolev Inst Geol & Mineral, Pr Akad Koptyuga 3, Novosibirsk 630090, Russia.
Novosibirsk State Univ, Ul Pirogova 2, Novosibirsk 630090, Russia.
Russian Acad Sci, Siberian Branch, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Bataleva, Yu. V.; Palyanov, Yu. N.; Borzdov, Yu. M.; Bayukov, O. A.; Баюков, Олег Артемьевич; Sobolev, N. V.; Russian Science Foundation [14-27-00054]
}
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Fomin, S. V.
A dielectric model for frozen mineral soils at a frequency of 435 MHz / S. Fomin, K. Muzalevskiy // Remote Sens. Lett. - 2021. - Vol. 12, Is. 9. - P. 944-950, DOI 10.1080/2150704X.2021.1947537. - Cited References: 16. - This work was supported by the state assignment of the Ministry of Science and Higher Education of the Russian Federation [project No. 0287-2021-0034] . - ISSN 2150-704X
Кл.слова (ненормированные):
Mean square error -- Mixer circuits -- Permittivity -- Remote sensing -- Soil moisture -- Soil surveys -- Coefficient of determination -- Complex relative permittivity -- Dielectric measurements -- Practical engineering -- Retrieval algorithms -- Root mean square errors -- Spectroscopic models -- Volumetric soil moistures -- Frozen soils
Аннотация: A single frequency refractive mixing dielectric model at 435 MHz for frozen mineral soils is proposed. The model was created based on the laboratory dielectric measurements of three soil samples in the ranges of soil moisture from 0.01cm3 cm−3 to 0.42cm3 cm−3, temperature from– 30°C to– 1°C, clay content (by weight) from 9.1% to 41.3%. Coefficient of determination R2 and root mean square error (RMSE) predicted by the model and measured values for real () and imaginary () part of the complex relative permittivity (CRP) are = 0.988 (= 0.323) and = 0.987 (= 0.100). Compared to well-known spectroscopic models, this model is simpler in practical engineering use. The input parameters of the model are the volumetric soil moisture, temperature and the content of the clay fraction. The output parameters are the real and imaginary parts of the CRP. The created model may be used to develop new remote sensing retrieval algorithms of temperature, the content of unfrozen water and ice in the root zone of frozen soils for northern regions.ε 'ε ''R2ε 'RMSEε 'R2ε ''RMSEε ''

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Держатели документа:
Laboratory of Radiophysics of the Earth Remote Sensing, Kirensky Institute of Physics Federal Research Center KSC Siberian Branch Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Muzalevskiy, K. V.; Музалевский, Константин Викторович; Фомин, Сергей Викторович
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    Fomin, S. V.
    Dielectric Model for Thawed Mineral Soils at a Frequency of 435 MHz / S. V. Fomin, K. V. Muzalevskiy // IEEE Geosci. Remote Sens. Lett. - 2021. - Vol. 18, Is. 2. - P. 222-225, DOI 10.1109/LGRS.2020.2972559. - Cited References: 20. - This work was supported by the Program of SB RAS, project №0356-2019-0004 . - ISSN 1545-598X. - ISSN 1558-0571
   Перевод заглавия: Диэлектрическая модель талых минеральных почв на частоте 435 МГц
Кл.слова (ненормированные):
thawed mineral soil -- dielectric model -- P-band
Аннотация: A single-frequency dielectric model at 435 MHz for mineral soils is proposed. The dielectric model was created on the basis of the laboratory dielectric measurements of three soil samples with clay content in the range of 9.1%-41.3%. The input parameters of the dielectric model are volumetric soil moisture and clay content. The output parameter of the dielectric model is complex permittivity (CP). The model prediction errors are comparable with the errors of instrumental measurements of the CP for refractive index and normalized attenuation 0.1-0.3 and 0.06-0.12, respectively, in terms of root-mean-square error (RMSE). The comparative analysis of dielectric predictions in the case of the developed model proved to obtain a better accuracy than the existing dielectric models. The created model may be recommended for practical use in the algorithms of soil-moisture retrieval in the P-band.

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Держатели документа:
Kirensky Institute of Physics, 660036 Krasnoyarsk, Russia

Доп.точки доступа:
Muzalevskiy, K. V.; Музалевский, Константин Викторович; Фомин, Сергей Викторович
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    Frequency-, temperature-, and texture-dependent dielectric model for frozen and thawed arctic mineral soi / V. L. Mironov [et al.] // Progr. Electromag. Res. Symp. (PIERS) : Proceedings. - 2017. - P. 2546-2553DOI 10.1109/PIERS.2017.8262181. - Cited References: 15. - Present research was supported in the frame of project No. 16-45-242162 in the corporative program of the Russian foundation for basic research and Krasnoyarsk region government foundation for science and technology. It was also supported by the RAS Presidium Program “Arctika”, 2015– 2017 and program II.12.1. of the SB RAS basic researches.
   Перевод заглавия: Частотно-, температурно-, и минералогически-зависимая диэлектрическая модель мерзлых и влажных арктических минеральных почв
Аннотация: A simple single-frequency dielectric model for the set of frequencies which are 0.45, 1.26, 1.4, 1.6, 5.4, 6.9, 9.6, and 10.7 GHz for frozen mineral soils is developed. The model is based on the dielectric measurements of three typical soils (sandy loam, silt loam, and silty clay) at the temperature range from -1°C to -30°C. The measured data as a function of moisture were fitted with the refractive mixing dielectric model. The model parameters are maximum bound water fraction, and refractive indexes of soil solid, unfrozen bound water, and wet ice. In the result of fitting measured data, the model parameters were determined as a functions of soil type (clay content), and soil temperature. The error of the predicted values of the complex relative permittivity (CRP) of frozen soils relative to the measured ones was evaluated through determination coefficients, and root mean square error (RMSE). The values of RMSE are on the order of the dielectric measurement error itself. The proposed dielectric model can be applied in active and passive remote sensing techniques used in the cold regions.

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Доп.точки доступа:
Mironov, V. L.; Миронов, Валерий Леонидович; Molostov, I. P.; Lukin, Y. I.; Лукин, Юрий Иванович; Karavaysky, A. Yu.; Каравайский, Андрей Юрьевич; Fomin, S. V.; Фомин, Сергей Викторович; Progress in Electromagnetics Research Symposium(38 ; 2017 ; May, 22 - 25 ; St Petersburg, Russia)
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Golovnev, N. N.
Structure of two new compounds of fluoroquinolone antibiotics with mineral acids / N. N. Golovnev, A. D. Vasil’ev // Russ. J. Inorg. Chem. - 2016. - Vol. 61, Is. 11. - P. 1419-1422, DOI 10.1134/S0036023616110073. - Cited References: 19 . - ISSN 0036-0236
Кл.слова (ненормированные):
Single crystals -- X ray diffraction -- Crystallographic data -- Fluoroquinolone antibiotics -- Intra- and intermolecular hydrogen bonds -- Levofloxacin -- Mineral acid -- Pi interactions -- Space Groups -- Sparfloxacin -- Hydrogen bonds
Аннотация: New compounds of sparfloxacin (C19H22F2N4O3, SfH) and levofloxacin (C18H20FN3O4, LevoH) with mineral acids, namely, sparfloxacinium bromide (SfH · HBr, I) and levofloxacindium diperchlorate (LevoH · 2HClO4, II), have been synthesized and characterized by X-ray diffraction. Crystallographic data are a = 7.7151(7) Å, , b = 26.109(3) Å,с = 10.008(1) Å, β = 103.556(1)°, V = 1959.7(3) Å3, space group P21/n, Z = 4 for I and a = 9.727(6) Å, b = 20.440(12) Å, с = 12.286(7) Å, β = 104.327(8)°, V = 2367(2)Å3, space group P21, Z = 4 for II. The structures of these compounds are stabilized by intra- and intermolecular hydrogen bonds and π–π interaction between SfH2 + or LevoH3 2+ ions. © 2016, Pleiades Publishing, Ltd.

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Публикация на русском языке Головнев, Николай Николаевич. Структура двух новых соединений фторхинолоновых антибиотиков с минеральными кислотами [Текст] / Н. Н. Головнев, А. Д. Васильев // Журн. неорг. химии : Наука, 2016. - Т. 61 № 11. - С. 1472-1475

Держатели документа:
Siberian Federal University, Svobodnyi pr. 79, Krasnoyarsk, Russian Federation
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50/38, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Головнев, Николай Николаевич
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Identification of anhydrous CaCl2 and KCaCl3 in natural inclusions by Raman spectroscopy / S. Grishina [et al.] // Chem. Geol. - 2018. - Vol. 493. - P. 532-543, DOI 10.1016/j.chemgeo.2018.07.017. - Cited References: 52. - The manuscript was greatly benefited from revisions of Dr. Matthew Steele-MacInnis and anonymous Reviewer. The authors are grateful to Dr. Sharigin V. for providing the sample and photograph of the chloride segregation from Udachnaya-East pipe, Dr. Mazurov M.P. for providing apatite and forsterite samples and Dr. Polozov A. for drawing the map. The computations were performed using facilities of the Computational Centre of the Research Park of St. Petersburg State University. This work is financially supported by the Russian Foundation for Basic Research (grants 15-05-09345 , 18-05-00682 ) and VEGA grant 1/0560/15. . - ISSN 0009-2541
Кл.слова (ненормированные):
Polymorphs CaCl2 -- Raman spectra -- Magma-salt interaction -- Chlorocalcite -- Daughter mineral -- Ab initio calculations
Аннотация: Anhydrous chlorides - CaCl2, and KCaCl3 (chlorocalcite) were identified as mineral inclusions in halite from the Siberian Large Igneous Province at the contact of magmatic intrusions and evaporates. Chlorocalcite was also found as daughter mineral in polyphase hypersaline inclusions. While Raman spectra of KCaCl3 (chlorocalcite) in natural inclusions are similar to spectra of synthetic analogue, the Raman spectra of natural CaCl2 do not correspond to the published Raman spectra of synthetic CaCl2. Simulations of Raman spectra using ab initio density-functional theory (DFT) allowed us to calculate the spectra of individual polymorphs of CaCl2 and to discriminate anhydrous CaCl2 phases in natural inclusions and synthetic CaCl2. In the spectrum of the Pbcn polymorph of CaCl2 twelve different peaks could be identified at 74, 95, 99, 107, 124, 158, 164, 179, 212, 236, 244, 256 cm−1 in contrast to five peaks in the spectrum of the Pnnm polymorph of CaCl2 at 115, 157, 160, 211 and 252 cm−1. Naturally occurring CaCl2 in inclusions in halite consist of Pbcn polymorph only, which probably results from a mechanical stress on cooling from magmatic to ambient temperatures. However, the Raman spectra of the synthetic CaCl2 corresponds to the Pnnm phase with small contributions of the Pbcn phase. Raman spectra of synthetic KCaCl3 with main peaks at 58, 67, 90, 97, 133, 139, 147, 193 cm−1 agrees well with the spectra of chlorocalcite in the natural inclusions. Positions of each atom in the KCaCl3 structure were refined using the density-functional theory. There are no imaginary phonon modes for the optimized structure, indicating that the structure of KCaCl3 is stable. Calculated Raman spectrum is in a good agreement with the Raman spectrum of synthetic and natural KCaCl3 samples.

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Держатели документа:
Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, Koptuyg Avenue 3, Novosibirsk, Russian Federation
Department of Economic Geology, Comenius University, Faculty of Natural Sciences, Ilkovicova 6, Bratislava, Slovakia
Universite de Lille, CNRS, UMR 8516, LASIR, Laboratoire de Spectrochimie Infrarouge et Raman, Lille, France
Universite de Lorraine, CNRS, CREGU, GeoRessources laboratory (UMR 7359), Vandoeuvre-les-Nancy, BP-70239, France
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50/38, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodniy 79, Krasnoyarsk, Russian Federation
Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dubravska cesta 9, Bratislava, Slovakia
Ioffe Institute, St. Petersburg, Russian Federation

Доп.точки доступа:
Grishina, S.; Kodera, P.; Uriarte, L. M.; Dubessy, J.; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Goryainov, S.; Simko, F.; Yakovlev, I.; Roginskii, E. M.
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Interaction of iron carbide and sulfur under P–T conditions of the lithospheric mantle / Y. V. Bataleva [et al.] // Dokl. Earth Sci. - 2015. - Vol. 463, Is. 1. - P. 707-711, DOI 10.1134/S1028334X15070077. - 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). . - ISSN 1028-334X

РУБ Geosciences, Multidisciplinary
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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Публикация на русском языке Взаимодействие карбида железа и серы при P–T-параметрах литосферной мантии [Текст] / Ю. В. Баталева [и др.] // Докл. акад. наук : Наука, 2015. - Т. 463 № 2. - С. 192–196

Держатели документа:
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
Novosibirsk State University, Novosibirsk, Russian Federation
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Bataleva, Yu. V.; Palyanov, Yu. N.; Borzdov, Yu. M.; Bayukov, O. A.; Баюков, Олег Артемьевич; Sobolev, N. V.; 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]
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10.

Karavayskiy, A. Yu.
Influence of dielectric relaxations of soil water on the temperature dependence of soil permittivity / A. Yu. Karavayskiy, Yu. I. Lukin // Opt. Spectrosc. - 2023. - Vol. 131, Is. 12. - P. 1190-1199, DOI 10.1134/S0030400X24700206. - Cited References: 23. - This work was supported by the Russian Science Foundation and the Krasnoyarsk Regional Fund of Science and Technology Support within the framework of scientific project no. 22-27-20112 . - ISSN 0030-400X. - ISSN 1562-6911
Кл.слова (ненормированные):
permittivity -- mineral soil -- soil moisture -- bound water -- Maxwell–Wagner effect
Аннотация: Using a generalized refractive mixture dielectric model, the influence of the relative permittivity spectra of bound and unbound water in mineral soil on the nature of the temperature dependence of the relative permittivity of natural mineral soil, with a clay fraction content of 41.3%, was studied in the electromagnetic field frequency range from 50 MHz to 15 GHz. The causes of the emergence of intersections in the relative permittivity spectra of mineral soil, obtained at different temperatures but for a sample of the same moisture content, have been studied. It has been proved that the emergence of such an intersection point in the frequency range up to 1.5 GHz is due to the Maxwell–Wagner effect in bound water. The dependences of the frequency of the intersection point of the relative permittivity spectra of mineral soil on the temperature and volumetric content of bound and unbound water have been studied.

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Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russia

Доп.точки доступа:
Lukin, Y. I.; Лукин, Юрий Иванович; Каравайский, Андрей Юрьевич
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