33 Result(s)

Article

Comparative Study of Siderites of Hydrothermal, Sedimentary, and Bacterial Origin by Physical Methods

The physicochemical properties of siderites (FeCO₃) of different origin have attracted attention due to challenges in the diagnostics with the aim of evaluating the involvement of bacteria in the formation of iro...

N. I. Chistyakova, A. V. Antonova, V. S. Rusakov, D. Kubaniova… in Crystallography Reports (2023)

Article

Mössbauer and Magnetic Study of Lanthanum Manganite La_1 – xCa_xMn_0.98Fe_0.02O_3 + δ (x = 0.05, 0.10, 0.20): Nonstoichiometric and Stoichiometric Composition

Mössbauer and magnetic study of calcium-doped lanthanum manganites La_1 – xCa_xMn_0.98Fe_0.02O_3 + δ (x = 0.05, 0.10, 0.20) of nonstoichiometric (LCM–NS) and stoichiometric (LCM–S) compositions have been carried out i...

V. D. Sedykh, I. Yu. Medvetskaya, D. I. Pchelina… in Crystallography Reports (2020)

Article

Mössbauer and Magnetic Studies of Doped Lanthanum Manganite La_1 – xCa_xMn_0.98Fe_0.02O₃ (x = 0.05, 0.10, 0.20): II. Stoichiometric Composition and Phase Segregation

Phase segregation in calcium-doped lanthanum manganite of stoichiometric composition La_1 – xCa_xMn_0.98Fe_0.02O₃ (x = 0.05, 0.10, 0.20) is studied in a wide temperature range by Mössbauer spectroscopy, X-ray diffrac...

D. I. Pchelina, I. Yu. Medvetskaya… in Journal of Surface Investigation: X-ray, S… (2019)

Article

Mössbauer and Magnetic Studies of Doped Lanthanum Manganite La_{1 – x}Ca_xMn_0.98Fe_0.02O_{3 + δ} (x = 0.05, 0.10, 0.20): I. Nonstoichiometric Composition

Mössbauer and magnetic studies of Ca-doped lanthanum manganites La_1 – xCa_xMn_0.98Fe_0.02O_3 + δ (x = 0.05, 0.10, 0.20) of a nonstoichiometric composition are performed. An increase in the Ca concentration and a decr...

D. I. Pchelina, I. Yu. Medvetskaya… in Journal of Surface Investigation: X-ray, S… (2018)

Article

Magnetic State of Quasiordered Fe–Al Alloys Doped with Ga and B: Magnetic Phase Separation and Spin Order

Results of structural, magnetic, and Mössbauer studies of quasi ordered alloys Fe₆₅Al_{35 − x}M _x (M _x = Ga, B; x = 0, 5 at %) are presented. The...

E. V. Voronina, A. G. Ivanova, A. K. Arzhnikov… in Physics of the Solid State (2018)

Article

Mössbauer study of iron minerals transformations by Fuchsiella ferrireducens

Biogenic transformations of iron-containing minerals synthesized ferrihydrite, magnetite and hydrothermal siderite by anaerobic alkaliphilic bacterium Fuchsiella ferrireducens (strain Z-7101^T) were studied by ⁵⁷F...

M. A. Gracheva, N. I. Chistyakova, A. V. Antonova, V. S. Rusakov… in Hyperfine Interactions (2017)

Article

Mössbauer study of the reduction of synthesized ferrihydrite by the alkaliphilic iron-reducing bacterium Fuchsiella ferrireducens

Samples of biogenic iron minerals obtained during the growth of the anaerobic alkaliphilic ironreducing bacterium Fuchsiella ferrireducens (strain Ζ-7101^Т) in the presence of synthesized ferrihydrite used as elec...

N. I. Chistyakova, A. V. Antonova… in Bulletin of the Russian Academy of Science… (2017)

Article

Donnayite-(Y) from the Albyn gold deposit, Russian Far East

S. V. Sokolov, N. I. Chistyakova, N. I. Orlova in Geochemistry International (2014)

Article

Mössbauer and magnetic studies of nanocomposites containing iron oxides and humic acids

Nanocomposites containing iron oxides and humic acids were studied by Mössbauer and magnetic measurements. The concentrations of humic acids as the precursor in nanocomposites were varied. Mössbauer investigat...

N. I. Chistyakova, A. A. Shapkin, T. V. Gubaidulina… in Hyperfine Interactions (2014)

Article

Mössbauer study of bacterial iron-reduction processes in natural glauconite and biotite

Interaction between a bacterial monoculture of alkaliphylic G. ferrihydriticus along with binary cultures of G. ferrihydriticus and cellulolytic C. alkalicellulosi and natural biotite and glauconite under alkalip...

A. A. Shapkin, N. I. Chistyakova… in Bulletin of the Russian Academy of Science… (2013)

Article

Reduction of synthetic ferrihydrite by a binary anaerobic culture of Anaerobacillus alkalilacustris and Geoalkalibacter ferrihydriticus grown on mannitol at pH 9.5

In the course of an investigation of alkaliphilic iron reduction, metabiotic interactions in a binary culture reducing synthetic ferrihydrite (SF) have been studied. The binary culture contained two anaerobic ...

D. G. Zavarzina, V. V. Kevbrin, T. N. Zhilina, N. I. Chistyakova… in Microbiology (2011)

Article

Reduction of amorphous Fe(III)-hydroxide by binary microbial culture, a Mössbauer study

Mössbauer investigations between 4.5 and 300 K of iron minerals formed during the growth of the binary culture containing two anaerobic alkaliphilic bacteria-dissimilatory iron-reducing Geoalkalibacter ferrihy...

N. I. Chistyakova, V. S. Rusakov, A. A. Shapkin, T. N. Zhilina… in Hyperfine Interactions (2010)

Article

Peculiarities of accessory zircon from the carter seamount tuffs (Sierra Leone Rise in the East Atlantic)

In volcanic tuffs, dredged during Cruise 23 of the R/V Akademik Nikolaj Strakhov, accessory zircon was found; except for the mineral-forming components, there were ∼2% of ThO₂ and 0.75% of Ce₂O₃ in zircon. During...

V. V. Petrova, S. G. Skolotnev, N. I. Chistyakova in Doklady Earth Sciences (2010)

Article

Investigation of iron mineral formation by dissimilatory alcalophilic bacterium Geoalkalibacter ferrihydriticus using Mössbauer spectroscopy

Formation of iron-bearing minerals by the dissimilatory alcalophilic bacterium Geoalkalibacter ferrihydriticus (strain Z-0531) under controlled laboratory conditions was studied using Mössbauer spectroscopy. Stra...

N. I. Chistyakova, V. S. Rusakov… in Bulletin of the Russian Academy of Science… (2010)

Article

Mössbauer study of compounds of Cu_{3 − x} Fe _x SnS₄ and Cu₂Fe_{1 −x} Zn _x SnS₄ systems

A Mössbauer study of the structural and charge states of ⁵⁷Fe and ¹¹⁹Sn atoms in the compounds of Cu_{3 −x} Fe _x SnS₄ and Cu₂Fe_{1 − x}

V. S. Rusakov, N. I. Chistyakova… in Bulletin of the Russian Academy of Science… (2010)

Chapter and Conference Paper

Iron minerals formed by dissimilatory iron-and sulfur reducing bacteria studied by Mössbauer spectrometry

Zero-field and in-field Mössbauer investigations and electron paramagnetic resonance (EPR) measurements to follow the kinetics of the iron mineral formation by thermophilic dissimilatory anaerobic Fe(III)-redu...

N. I. Chistyakova, V. S. Rusakov, K. A. Nazarova, Yu. A. Koksharov… in ICAME 2007 (2009)

Chapter and Conference Paper

Mössbauer study of tektites

Room temperature ⁵⁷Fe Mössbauer spectroscopy has been used to investigate the structural and oxidation state of Fe in tektites from different strewn fields. Spectra have been analyzed in terms of two quadrupole s...

M. V. Volovetsky, V. S. Rusakov, N. I. Chistyakova, O. A. Lukanin in ICAME 2007 (2009)

Article

Mössbauer study of tektites

Room temperature ⁵⁷Fe Mössbauer spectroscopy has been used to investigate the structural and oxidation state of Fe in tektites from different strewn fields. Spectra have been analyzed in terms of two quadrupole s...

M. V. Volovetsky, V. S. Rusakov, N. I. Chistyakova, O. A. Lukanin in Hyperfine Interactions (2008)

Article

Iron minerals formed by dissimilatory iron-and sulfur reducing bacteria studied by Mössbauer spectrometry

Zero-field and in-field Mössbauer investigations and electron paramagnetic resonance (EPR) measurements to follow the kinetics of the iron mineral formation by thermophilic dissimilatory anaerobic Fe(III)-redu...

N. I. Chistyakova, V. S. Rusakov, K. A. Nazarova… in Hyperfine Interactions (2008)

Article

Study of the kinetics of bacterial synthesis of iron minerals by Mössbauer spectroscopy

The kinetics of formation of iron-containing minerals by thermophilic dissimilatory iron-reducing bacteria (strain Z-0001) under controlled laboratory conditions has been investigated by Mössbauer spectroscopy...

N. I. Chistyakova, V. S. Rusakov… in Bulletin of the Russian Academy of Science… (2007)