A5084285355- High-pressure geophysics and materials
- Geological and Geochemical Analysis
- Crystal Structures and Properties
- Solid-state spectroscopy and crystallography
- Glass properties and applications
- Clay minerals and soil interactions
- Inorganic Fluorides and Related Compounds
- Diamond and Carbon-based Materials Research
- Crystallography and molecular interactions
- Hydrocarbon exploration and reservoir analysis
- X-ray Diffraction in Crystallography
- Methane Hydrates and Related Phenomena
- Mineralogy and Gemology Studies
- Zeolite Catalysis and Synthesis
- Chemical Thermodynamics and Molecular Structure
- Geochemistry and Geologic Mapping
- Crystallization and Solubility Studies
- graph theory and CDMA systems
- Advanced Battery Materials and Technologies
- Perovskite Materials and Applications
- Nuclear materials and radiation effects
- Organic and Molecular Conductors Research
- Nonlinear Optical Materials Research
- Geotechnical and Geomechanical Engineering
- Carbon Nanotubes in Composites
V.S. Sobolev Institute of Geology and Mineralogy
2016-2025
Siberian Branch of the Russian Academy of Sciences
1999-2025
Western University
2003-2023
Hebei Normal University
2023
V. N. Karazin Kharkiv National University
2022-2023
Chelyabinsk State University
2006-2021
Russian Academy of Sciences
2002-2014
Institute of Mineralogy
1999-2012
Novosibirsk State University
2003-2012
University of Saskatchewan
2011
Mineral inclusions in diamonds provide an important source of information about the composition continental lithosphere at depths exceeding 120-150 km, i.e., within diamond stability field. Fossilized high pressures coesite from a Venezuela have been identified and measured by using laser Raman synchrotron x-ray microanalytical techniques. Micro-Raman measurements on intact inclusion remnant vibrational band shifts give confining pressure 3.62 (+/-0.18) GPa. Synchrotron single-crystal...
Abstract The series of phase transitions on increasing pressure and reverse decompression was followed in crystals monoclinic orthorhombic polymorphs L ‐cysteine by using Raman spectroscopy, with the samples placed a diamond anvil cell together to ensure identical pressures two samples. effects hydrostatic are shown be radically different. Depending starting polymorph, different phases formed under compression/decompression conditions. effect polymorph studied for first time. Phase (at ∼2.9...
Micro‐Raman spectroscopy and X‐ray diffraction method (XRD) were used to characterize impact carbonaceous rocks excavated from the Popigai crater (Siberia). The deconvolution of first‐order Raman spectra containing different amounts carbon phases (diamond, lonsdaleite graphite) allowed identification spectrum. most intensive band at 1292–1303 cm −1 was ascribed A 1g vibration mode lonsdaleite, whereas less intense 1219–1244 attributed, in agreement with previously reported ab initio...
Experimental investigation of the phase diagram system carbon dioxide−water at pressures up to 2.7 GPa has been carried out in order explain earlier controversial results on decomposition curves hydrates formed this system. According X-ray diffraction data, solid and/or liquid phases water and CO2 coexist room temperature within pressure range from 0.8 2.6 GPa; no clathrate are observed. The neutron experiments involving samples with different CO2/H2O molar ratios, data show that hydrate...
When crystals of four polymorphs – a stable α-form and three metastable ones (β-, γ-, δ-forms) are simultaneously present in pressure cell, immersed 1 : pentane–isopentane mixture, the least β-form recrystallises exclusively into γ-form (if no δ-form seed is present) or concomitantly γ- δ-forms present). However, never to α-form, even if latter also as potential seed.
Abstract The occurrence of buetschliite, K 2 Ca(CO 3 ) , as inclusions in mantle minerals, is considered one the keys to understanding phase relationships dense carbonates and outlines potential role potassium Earth's deep carbon cycle. Within this scope, high‐pressure behavior synthetic buetschliite characterized by situ Raman spectroscopy up 19 GPa 300°C. Up 6 GPa, compression regular, then splitting some lattice internal modes defines transition a low‐symmetry phase, analogy that observed...
ABSTRACT Micro‐Raman spectroscopy was employed to analyze apatite‐containing samples from the Tomtor complex of ultrabasic rocks and carbonatites, located in sharply continental region Yakutia, Russia. Raman spectra excited at a wavelength 532 nm revealed characteristic vibrational bands apatite, as well attributed carotenoid‐type cyanobacteria. Additionally, an artifact, exhibited resulting laser‐induced photoluminescence trivalent rare earth elements (REEs). Preresonance recorded least two...
Abstract Flamite (Ca,Na,K) 2 (Si,P)O 4 ( P 6 3 ; a = 43.3726(18), c 6.8270(4) Å; V 11122.2(9) Å ), natural analogue of the P,Na,K-doped high-temperature α-Ca SiO modification, is new mineral from Ca- and Al-rich paralava, an ultrahigh-temperature combustion metamorphic melt rock. The type locality situated in southern Hatrurim Basin, Negev Desert, Israel. occurs as regular lamellar intergrowths with partially hydrated larnite, together rock-forming gehlenite, rankinite Ti-rich andradite,...
Minerals of the Zn-Cd-S-Se system that formed by moderately reduced ~800–850 °C combustion metamorphic (CM) alteration marly sediments were found in marbles from central Jordan. Their precursor contain Se- and Ni-enriched authigenic pyrite ZnS modifications with high Cd enrichment (up to ~10 wt%) elevated concentrations Cu, Sb, Ag, Mo, Pb. The are composed calcite, carbonate-fluorapatite, spurrite, brownmillerite characterized P, Zn, Cd, U, Se, Ni, V, Mo contents. Main accessories either...
The structural behavior of thomsonite compressed in aqueous medium up to 3 GPa was studied by means situ synchrotron powder diffraction with a diamond anvil cell. In the range between 0.0001 and 2 GPa, compressibility is markedly lower than that reported previously, where non-penetrating (with only 6% H2O) used. This indicates pressure-induced hydration (PIH), which results transition an over-hydrated phase observed at GPa. structure contains one additional, half-occupied H2O position,...
Layer silicates F‐ and OH‐apophyllites, KCa 4 Si 8 O 20 (F, OH)·8H 2 O, have been investigated by Raman spectroscopy at hydrostatic nonhydrostatic pressures up to ~8 GPa in diamond anvil cells using a : 1 methanol–ethanol mix as pressure‐transmitting medium. Our experiments show that compression, apophyllites retain their crystalline states (i.e. no amorphization) 5 GPa. The wavenumbers of most bands exhibit linear dependences on pressure, except for few ones, e.g. 162 3565 cm –1 OH‐form...
Lime-monteponite solid solutions [(Ca,Cd)O ss] with 58.5–73.3 wt% CdO were discovered as an accessory phase in medium-temperature combustion metamorphic (CM) spurrite-fluorellestadite/ fluorapatite marbles from central Jordan. The type locality is situated the northern part of Siwaqa complex (Tulul Al Hammam area), largest area "Mottled Zone" Formation Dead Sea region. derived bitumen-rich calcareous marine sediments Muwaqqar Chalk Marl Formation, which have high Cd, Zn, U, and Ni...
Raman spectra were acquired from the synthetic cubic K 6 Fe 25 S 26 Cl phase (55.3 wt% Fe) and ten natural djerfisherites (Fe,Cu,Ni) with various contents of (from 15.5 to 22.6 atoms per formula unit (apfu)) Ni + Cu Co 1.4 9.0 apfu). The samples came rocks Udachnaya, Obnazhennaya Vtorogodnitsa kimberlite pipes high‐grade contact marbles near Kochumdek River (Siberian craton, Russia). Diagnostic features both djerfisherite can be summarized as follows: presence two strong bands at 264–273...