A5079416031- Diamond and Carbon-based Materials Research
- High-pressure geophysics and materials
- Geological and Geochemical Analysis
- Mineralogy and Gemology Studies
- Advanced materials and composites
- Metal and Thin Film Mechanics
- Tunneling and Rock Mechanics
- Laser Material Processing Techniques
- Crystal Structures and Properties
- Geological Studies and Exploration
- earthquake and tectonic studies
- Carbon Nanotubes in Composites
- Advanced Fiber Laser Technologies
- Geotechnical and Geomechanical Engineering
- Pleistocene-Era Hominins and Archaeology
- Extraction and Separation Processes
- Nuclear materials and radiation effects
- Geochemistry and Geologic Mapping
- Nonlinear Optical Materials Studies
- Electronic and Structural Properties of Oxides
- Metal Extraction and Bioleaching
- Facial Trauma and Fracture Management
- Luminescence Properties of Advanced Materials
- Isotope Analysis in Ecology
- Magnesium Oxide Properties and Applications
Saint Petersburg Mining University
2017-2025
Institute of Geology, Komi Science Centre
2023
Ural Federal University
2015
Mineral Resources
2014
Institute of Engineering Physics
2010
Ural Mining and Metallurgical Company (Russia)
2010
Mining Institute
2007
Yakut Scientific Research Institute of Agriculture
2004
Abstract Spongy clinopyroxene is common in most mantle-derived xenoliths and megacrysts of eclogitic peridotitic parageneses. Its formation commonly attributed to the partial melting a primary response various factors, including changes pressure temperature or infiltration external melts fluids. In order study mechanism spongy detail, we selected six inclusions diamonds with varying amounts (from ~10% 100%). We employed computer tomography, electron microprobe analyses Raman spectroscopy...
Tightly focused 515-nm, 0.3-ps laser pulses modify in a filamentation regime the crystalline structure of an Ib-type high-pressure, high-temperature (HPHT) synthesized diamond thin-plate form. The modified microregions (micromarks) yellow and colorless crystal zones, possessing different concentrations elementary substitutional nitrogen (N) impurity atoms (C-centers), exhibit their strongly diminished local IR absorption (upon correction to thickness scaling factor). Simultaneously,...
Analysis of internal structure in large IIb-type high pressure-high temperature (HPHT) synthetic single-crystal diamond are presented. The concentration boron impurity different growth sectors varies from 0.02 to 10.3 ppm. It is shown that the manufacturing plates, inhomogeneities should be taken into account; plates with characteristics can cut one diamond, each which used for its own purpose.
Abstract We have investigated a diamond crystal that consists of several misorientated subgrains. The main feature the is dark areas in cathodoluminescent core has ‘estuary-like’ boundaries extending along subgrain interfaces. >3100 ppm nitrogen, and share B form >95%; absorbance centre N 3 V H at 3107 cm –1 reaches 75 . N3 absorbance, as well luminescence, absent core. In outer part crystal, bright blue luminescence apparent, 5.3 These observations could be explained by conversion...
This work studies and compares the main morphological, structural, mineralogical features of 350 diamond crystals from Karpinsky-I 300 Arkhangelskaya kimberlite pipes. The share octahedral habit together with individual transitional forms sheaf-like splintery striation is higher in pipe makes 15 %. cuboids tetrahexahedroids stands at 14 dodecahedroids pipes are 60 % 50 %, respectively. indicator role nitrogen-vacancy N3 center active absorption luminescence shown. Crystals system have...
Ballas diamond is a rare form of the polycrystalline radial aggregate diamonds with diverse internal structures. The morphological features ballas have experienced repeated revision. need that this paper presents for development crystal-genetic classification was determined by rich variety combined and transitional forms ballas-like diamonds, which include aggregates, crystals, intergrowths. new combines already-known types as well discovered in placers Yakutia, Urals, Brazil....
In the present work, diamonds with yellow cores and a slightly colored or colorless rims have been studied.Three groups of crystals that differ in spectroscopic features identified.In first group, heterogeneity color is due to variation nitrogen concentration, which as simplest low-temperature С center.Absorption spectra group display peaks at wavenumbers 1344 1332 cm -1 С+ centers, respectively.The second also exhibits higher concentrations form C centers zone.However, concentration high...
Zonal and sectorial heterogeneities in natural diamonds provide information on the growth conditions post-growth changes. Cathodoluminescence (CL) microscopy revealed these a very detailed manner with high spatial resolution. In this study, factors affecting CL images of two were analyzed results cathodoluminescence studies steady-state (SS-CL) scanning modes compared. SS-CL was observed using an optical microscope, mode evaluated via SEM (SEM-CL). It demonstrated that relative brightness...