Energy Dispersive Diffraction Research Articles

Investigation of the Structure and Distribution of Chemical Elements between the Phases of Hard Alloys of the Cr<sub>3</sub>C<sub>2</sub>-Ti System, Obtained at Various Modes of Explosive Compaction

The Article presents the findings of the studies of the microstructure, chemical and phase composition of the Cr3C2-Ti system alloys obtained by the explosion. Scanning electron microscopy, energy dispersive and x-ray diffraction analyses were used. The program Thermo-Calc software was used to calculate the equilibrium phases. The phase composition of the compact was shown to fully correspond to that of the initial powder mixture during explosive pressing in the modes of heating from 300 ̊С to 600 ̊С. When heated above 600 ̊С, the chemical interaction of the initial components begins with the formation of new boundary phases. Meanwhile, there is a change in the sample destruction nature and a significant increase in hardness, which points to the hard alloy consolidation. The increase in the powder mixture heating in shock waves to 1000 ̊С leads to intensive macrochemical interaction of the powder mixture components and to formation of an equilibrium phase composition. The established temperature limits determine the most appropriate parameters of shock-wave loading when producing hard alloys by explosive pressing.

Bismuth and oxygen valencies and superconducting state properties in Ba1-xKxBiO3 superconductor

Relationship between variation of Bi and O valence states in perovskite bismuthates Ba1-xKxBiO3 (BKBO), grown in modified synthesis conditions, and their superconducting state properties is presented. Chemical composition, crystal structure and phase purity of BKBO was determined via micro X-ray fluorescence (μXRF), energy-dispersive X-ray spectroscopy (EDS) and X-ray powder diffraction technique (XRD). X-ray photoemission spectroscopy (XPS) and SQUID magnetometry showed variations of electronic structure and superconducting state properties, i.e., lower and upper critical fields, and transition temperature for the samples synthesized at various conditions. We report that, multiple valencies of bismuth, observed already in BKBO systems and assigned to disproportionation of bismuth valence states, lead in fact to deterioration of superconducting state properties.

Electrohydromodulation for phosphate recovery from wastewater

The mining of phosphate rock to produce fertilizer, and subsequent disposal of the municipal wastewater containing a significant fraction of the phosphate applied agriculturally, has led to environmental impacts of phosphate mining as well as surface water eutrophication. However, recovery of phosphate (H2PO4-, HPO42-, PO43-) from wastewater, either chemically or biologically, has not been sufficiently economical at low phosphate concentrations in raw wastewater (~2.4 mg-P l−1) to motivate widespread adoption. In this work, we demonstrate phosphate recovery directly from raw and mineral-spiked septic tank effluent by electrochemical pH shifting, termed electrohydromodulation (EHM), without expensive chemical addition. EHM using a CMI-7000 multivalent cation exchange membrane (MCEM) at 5 V at 1.347 mA/cm2 resulted in the highest efficiency at lowest energy consumption. 94 and 95% phosphate were recovered from mineral-spiked septic tank effluent (simulating advanced oxidation-based direct potable reuse water), and raw septic tank effluent, at an energy demand of 1.046 kWh/m3 (3.960 kWh/1000 Gal) and 1.863 kWh/m3 (7.054 kWh/1000 Gal), respectively, low despite use of non-toxic, inexpensive graphite electrodes. Results from scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray powder diffraction (XRD) indicated that recovered precipitates consisted principally of amorphous calcium phosphate (ACP), with minor amounts of amorphous calcium carbonate (ACC), having an overall Ca:P ratio of 2. CO2 stripping at low pH prior to pH shifting was found to minimize competitive calcite precipitation to improve product purity. Electrodes used intermittently, with polarity reversal, over 1.5 years of experiments were intact from fouling.

Microstructural effects on central crack formation in hot cross-wedge-rolled high-strength steel parts

Central cracking in cross-wedge-rolled workpieces results in high wastage and economic loss. Recent cross-wedge rolling tests on two batches of steel showed that one batch formed central cracks, while the other was crack-free. The batches were both nominally of the same chemical composition and thermomechanical treatment history. In addition, both batches had passed all the standard quality assessments set for conventional forging processes. It was suspected that the different cracking behaviours were due to differences in microstructure between the two as-received steel billets, and the material in cross-wedge rolling (CWR) was more sensitive to the initial microstructure compared with other forging processes due to its specific loading condition including ostensibly compression and large plastic strain. Nevertheless, no previous study of this important problem could be identified. The aim of this study is, therefore, to identify the key microstructural features determining the central crack formation behaviour in CWR. The hot workability of the as-received billets was studied under uniaxial tensile conditions using a Gleeble 3800 test machine. Scanning electron microscope with energy-dispersive X-ray spectroscopy and electron backscatter diffraction was applied to characterise, quantitatively analyse, and compare the chemical composition, phase, grain, and inclusions in these two billets, both at room temperature and also at the CWR temperature (1080 °C). Non-metallic inclusions (oxides, sulphides, and silicates) in the billets were determined to be the main cause of the reported central cracking problem. The ductility of the steels at both room and elevated temperatures deteriorated markedly in the presence of the large volumes of inclusions. Grain boundary embrittlement occurred at the CWR temperature due to the aggregation of inclusions along the grain boundaries. It is suggested that a standard on specifying the inclusion quantity and size in CWR billets be established to produce crack-free products.

Single-Step Hydrometallurgical Method for the Platinum Group Metals Leaching from Commercial Spent Automotive Catalysts

Platinum group metals (PGMs) are considered critical raw materials, thus their recycling and re-use is of outmost importance. Among the PGMs, platinum (Pt), palladium (Pd) and rhodium (Rh) are the basic metals used in catalytic converters. Concerning the stringent EU standards for emission control imposed to car manufacturers (Euro 6d nowadays), the worldwide demand for PGMs is being increased. As for PGM recovery methods, research is focusing on greener, plain recovery techniques, which utilize milder reagents and offer energy efficiency. In this work, a state-of-the-art hydrometallurgical process is proposed resulting in recovery rates for Pt, Pd and Rh, namely 100%, 92% and around 60%, respectively. A batch of more than 20 commercial spent catalyst samples has been mechanically pre-processed (i.e. sorted, decanned, milled, grinded, homogenized and characterized), in order for a 20 kg sample of homogenized fine pent catalytic powder to be derived. The proposed hydrometallurgical method does not involve any kind of thermal pre-treatment or chemical reduction, thus energy consumption is minimized, while the use of chemicals has been restricted to simple and cheap inorganic solvents (namely HCl, NaCl and H2O2). The aforementioned recovery rates have been validated through X-ray fluorescence spectroscopy analysis (XRF). The equipment used has been successfully calibrated to measure low PGM concentrations (less than 50 ppm for each metal). The kinetics of the hydrometallurgical process have also been studied, in short intervals, and spent catalyst material has been characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy analysis (EDS) and X-ray powder diffraction (XRD).

Orientation-Dependent Deformation Behavior of 316L Steel Manufactured by Laser Metal Deposition and Casting under Local Scratch and Indentation Load.

This study analyzes the local deformation behavior of austenitic stainless steel 316L, manufactured conventionally by casting and additively by laser metal deposition (LMD). We produced directionally solidified 316L specimens with most grains showing (001) orientations parallel to the longitudinal specimen axis. We conducted nanoindentation and scratch experiments for local mechanical characterization and topography measurements (atomic force microscopy and confocal laser scanning microscopy) of indentation imprints and residual scratch grooves for the analysis of the deformation behavior and, in particular, of the pile-up behavior. The local mechanical properties and deformation behavior were correlated to the local microstructure investigated by scanning electron microscopy with energy dispersive X-ray spectroscopy and electron backscatter diffraction analysis. The results show that the local mechanical properties, deformation behavior, and scratch resistance strongly depend on the crystallographic orientation. Nearly (001)-oriented grains parallel to the surface show the lowest hardness, followed by an increasing hardness of nearly (101)- and (111)-oriented grains. Consequently, scratch depth is the greatest for nearly (001)-oriented grains followed by (101) and (111) orientations. This tendency is seen independently of the analyzed manufacturing route, namely Bridgman solidification and laser metal deposition. In general, the laser metal deposition process leads to a higher strength and hardness, which is mainly attributed to a higher dislocation density. Under the investigated loading conditions, the cellular segregation substructure is not found to significantly and directly change the local deformation behavior during indentation and scratch testing.

Development of reproducible thiourea sensor with binary SnO2/V2O5 nanomaterials by electrochemical method

In this methodology, the thiourea (TU)sensor was made-up by means of glassy carbon electrode (GCE) layered by the wet-chemically prepared binary SnO2/V2O5 nanomaterials (NMs). The existence of SnO2 and V2O5 in prepared spherical NPs were categorized by X-ray photoelectron spectroscopy (XPS), Field Emission Scanning Electron Microscopy (FESEM), Energy-dispersive X-ray spectroscopy and X-ray Powder Diffraction (XRD). The TU sensor was displayed the linear responses in concentration range (LDR) of 0.1 nM ~ 0.01 mM. The calibration curve of TU sensor was made by plotting current verses concentration of TU, which was measured by electrochemical technique. The sensitivity and lower limit of detection (DL) for TU sensor were calculated from calibration curve, which are found as 17.0918 µAµM-1cm−2 and 95.40 ± 4.77 pM respectively. The analytical parameters of TU sensor such as reproducibility, response time and stability were measured and found efficient results. It also was validated in the detection of TU in presence of real bio-samples. Thus, this unique and prospective method is introduced to develop the selective biosensor by electrochemical approach, which might be a pioneer sensor probe for its simple and reliable approach for the safety of healthcare and biomedical fields in a large scales.

Microstructural characteristics and properties of CoCrFeNiNbx high-entropy alloy coatings on pure titanium substrate by pulsed laser cladding

CoCrFeNiNbx (x = 0 or 1 at.%) high-entropy alloy (HEA) coatings with good metallurgical bonding were successfully prepared on surfaces of pure titanium sheets by pulsed laser cladding. Phase constitutions and microstructural characteristics of the HEA coatings were characterized and analyzed by combined use of X-ray diffraction, electron channeling contrast imaging, energy dispersive spectroscopy and electron backscatter diffraction techniques. Results show that the HEA coating without Nb is consisted of BCC solid-solution phase with equiaxed bulk grain morphology and Cr2Ti Laves phase (C14-type hexagonal structure) with fine interdendritic lamellar morphology. After adding 1 at.% Nb, in addition to the BCC solid-solution phase and the Cr2Ti Laves phase, Cr2Nb Laves phase with C15-type cubic structure also appears in the interdendritic region in the HEA coating. Hardness tests reveal that the CoCrFeNiNbx HEA coatings are significantly harder than the pure titanium substrate (~122 HV). The hardness value of the HEA coating with 1 at.% Nb reaches 1008 HV, which is ~ 8.3 times that of the substrate and considerably higher than that of bulk HEAs with similar compositions. Such high hardness can be attributed to the combined contribution from solid-solution hardening, and hardening from grain refinement and Laves phases with fine lamellar morphologies.

Development of Transition-Edge Sensor X-ray Microcalorimeter Linear Array for Compton Scattering and Energy Dispersive Diffraction Imaging

We present a strip transition-edge sensor microcalorimeter linear array detector developed for energy dispersive X-ray diffraction imaging and Compton scattering applications. The prototype detector is an array of 20 transition-edge-sensors with absorbers in strip geometry arranged in a linear array. We discuss the fabrication steps needed to develop this array including Mo/Cu bilayer, Au electroplating, and proof-of-principle fabrication of long strips of SiNx membranes. We demonstrate minimal unwanted effect of strip geometry on X-ray pulse response, and show linear relationship of 1/pulse height and pulse decay times with absorber length. For the absorber lengths studied, preliminary measurements show energy resolutions of 40 eV to 180 eV near 17 keV. Furthermore, we show that the heat flow to the cold bath is nearly independent of the absorber area and depends on the SiNx membrane geometry.

Mineralogical and mechanical analysis of cement-stabilised sands

Wet deep-soil mixing methods are well-established procedures involving the mixing of a self-hardening slurry with in situ soil in order to improve its original hydraulic and mechanical properties. This paper presents the results of a comprehensive experimental investigation conducted on cement-stabilised sandy soil samples collected from six panels produced by the cutter soil mixing method. The wet-grab material used in the tests was taken at a depth of 2·0 m below ground level and cured in a controlled laboratory environment. A comparison of the outcomes obtained from qualitative and semi-quantitative mineralogical analyses (scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS) and X-ray powder diffraction) along with the interpretation of mechanical tests performed on the wet-grab samples provided a better understanding of the reaction mechanisms that occurred on site during hydration of the binder. Qualitative mineralogical analyses supported by an innovative semi-quantitative approach based on SEM–EDS investigations confirmed the presence and the influence of specific binder components (e.g. slag) involved in the hydration process.

Regenerative engineered vascularized bone mediated by calcium peroxide.

One of the main challenges hindering the clinical translation of bone tissue engineering scaffolds is the lack of establishment of functional vasculature. Insufficient vascularization and poor oxygen supply limit cell survival within the constructs resulting in poor osseointegration with the host tissue and eventually leading to inadequate bone regeneration. Inspired by cues from developmental biology, we regenerative engineered a composite matrix by incorporating calcium peroxide (CaO2 ) into poly(lactide-co-glycolide) (PLGA) microsphere-based matrices and sought to assess whether the delivery of the byproducts of CaO2 decomposition, namely O2 , Ca2+ , and H2 O2 could enhance the regeneration of vascularized bone tissue. The composite microspheres were successfully fabricated via the oil-in-water emulsion method. The presence and encapsulation of CaO2 was confirmed using scanning electron microscopy, energy dispersive x-ray spectroscopy, thermogravimetric analysis, and X-ray powder diffraction. The microspheres were further heat sintered into three-dimensional porous scaffolds and characterized for their degradation and release of byproducts. The in vitro cytocompatibility of the matrices and their ability to support osteogenic differentiation was confirmed using human adipose-derived stem cells. Lastly, an in vivo study was performed in a mouse critical-sized calvarial defect model to evaluate the capacity of these matrices in supporting vascularized bone regeneration. Results demonstrated that the presence of CaO2 increased cellularization and biological activity throughout the matrices. There was greater migration of host cells to the interior of the matrices and greater survival and persistence of donor cells after 8 weeks, which in synergy with the composite matrices led to enhanced vascularized bone regeneration.

The charge transport mechanism of a photodiode made of silver sulfide quantum dots decorated graphene for selective detection of blue light

A novel photodiode made of silver sulfide quantum dots decorated graphene was developed for the first time for the selective detection of blue light. The process of the decoration of graphene surface with silver sulfide quantum dots was performed through the synthesis of Ag2S QDs in the presence of graphene solution via polyol technique. The X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy and energy dispersive electron diffraction spectroscopy confirmed the successful decoration of graphene surface with Ag2S QDs. The high-resolution transmission electron microscopy revealed that the Ag2S QDs were distributed uniformly on the graphene surface and the average diameter of these QDs was around 8 ± 2 nm. The optical absorption measurements comprises that the decoration of graphene with Ag2S QDs leads to a red shift of the spectrum and an increase of the optical absorption by two times. The luminescence measurements revealed that the decoration of graphene with Ag2S QDs led to a decrease of the luminescence intensity, implying the efficient separations of electrons and holes. The photo-electrical properties indicated that the Ag2S QDs decorated graphene exhibited photodiode like behavior with high response to blue light. The luminescence intensity exhibited a linear regression against the photocurrent up to 5 lx. Therefore, the developed photodiode showed a promising potential to be employed as efficient selective photodiode for blue light.

Advancing characterisation with statistics from correlative electron diffraction and X-ray spectroscopy, in the scanning electron microscope

The routine and unique determination of minor phases in microstructures is critical to materials science. In metallurgy alone, applications include alloy and process development and the understanding of degradation in service. We develop a correlative method, exploring superalloy microstructures, which are examined in the scanning electron microscope (SEM) using simultaneous energy dispersive X-ray spectroscopy (EDS) and electron backscatter diffraction (EBSD). This is performed at an appropriate length scale for characterisation of carbide phases’ shape, size, location, and distribution. EDS and EBSD data are generated using two different physical processes, but each provide a signature of the material interacting with the incoming electron beam. Recent advances in post-processing, driven by ‘big data’ approaches, include use of principal component analysis (PCA). Components are subsequently characterised to assign labels to a mapped region. To provide physically meaningful signals, the principal components may be rotated to control the distribution of variance. In this work, we develop this method further through a weighted PCA approach. We use the EDS and EBSD signals concurrently, thereby labelling each region using both EDS (chemistry) and EBSD (crystal structure) information. This provides a new method of amplifying signal-to-noise for very small phases in mapped regions, especially where the EDS or EBSD signal is not unique enough alone for classification.

Observations on Debris Composition and Size Distribution in WEDM

The study of the actual conditions in the discharge gap is a matter of large interest in area of WEDM. It is known that gap width and the presence of electrically conductive debris particles are the dominant factors affecting dielectric breakdown strength. Whereas, little information of that in WEDM is available, probably because of the difficult access to inter-electrode gap, wire vibration, etc. In this work the results of experimental observations of debris composition, morphology and size distribution of particles in WEDM are presented. A device designed to collect water from the working region and a set of WEDM experiments have been proposed. Techniques such as Energy Dispersive X-Ray Fluorescence Spectroscopy, laser diffraction, SEM and TEM have been used to characterize WEDM debris. Results show that debris in the gap is dominated by the presence of Cu-Zn from the wire. The presence of spherical particles in the range 1-20 μm has been confirmed. Histograms of particle volume and amount have been obtained, revealing the presence of massive amount of sub-micron and nanometric particles, most of them oxides of metals coming from the electrodes. The conclusions will be useful for future simulation work about particle movement and electrical fields in the working gap in WEDM.

Oxide dispersion strengthened 304 L stainless steel produced by ink jetting and laser powder bed fusion

This paper discusses the fundamentals of a novel hybrid method to synthesize oxide dispersion strengthened (ODS) 304 L stainless steel (SS) alloy using a modified laser powder bed fusion (LPBF) machine. Previously, ODS metal matrix composites have been produced by LPBF via ball-milling, which is expensive to scale. Here, we selectively dope yttria nanoparticles into a SS matrix by jetting a precursor chemistry onto the SS substrate prior to laser conversion and consolidation. The new alloy shows good room temperature mechanical properties. Microstructures are studied using electron microscopy, energy dispersive spectroscopy and electron backscatter diffraction.

In situ observations of single grain behavior during plastic deformation in polycrystalline Ni using energy dispersive Laue diffraction

Energy dispersive X-ray Laue diffraction is applied to investigate the deformation behavior of individual grains in a polycrystalline nickel wire under tensile loading. 38 Laue spots are identified in the Laue pattern which originate from 9 separate grains. The simultaneous measurements of the Laue spot's position and energy obtained by using a 2D energy dispersive detector, allows to track the evolution of the 9 grains through multiple stages of deformation. Angular and spectral elongation (streaking) of the Laue spots increases as tensile loading is increased and is attributed to macroscopic texture changed and strain due to defect accumulation. On the single grain level, a correlation between crystallographic orientation and strain is investigated. Moreover, spatially resolved anisotropic deformation within a single grain is measured to increase at the grain boundaries. Comparison of the grain specific responses allow for development of a deformation scenario for the whole specimen. The presented experiment demonstrates an alternative protocol for the investigation of deformation mechanisms in polycrystalline materials.

Effect of current pulsing on super 304HCu weld joints

Purpose Super 304HCu super austenitic stainless steel tubes containing 2.3 to 3 (Wt.%) of copper (Cu) is used in superheaters and reheater tubings of nuclear power plants. In general, austenitic stainless steels welded by conventional constant current gas tungsten arc welding (CC-GTAW) produce coarse columnar grains, alloy segregation and may result in inferior mechanical properties. Pulsed current gas tungsten arc welding (PC-GTAW) can control the solidification structure by altering the prevailing thermal gradients in the weld pool. Design/methodology/approach Super 304HCu tubes of Ø 57.1 mm and the wall thickness of 3.5 mm were autogenously welded using CC and PC-GTAW processes. Joints are characterized using optical microscopy, electron microscopy, energy dispersive spectroscopy and electron backscatter diffraction (EBSD) techniques. Hot tensile properties of the weld joints were evaluated and correlated with their microstructural features. Findings Current pulsing in GTAW has resulted in minimal eutectic film segregation, lower volume % of delta ferrite and appreciable improvement in tensile properties than CC-GTAW joints. Originality/value The EBSD boundary map and inverse pole orientation map of Super 304HCu weld joints evidence the grain refinement and much frequent high angle grain boundaries achieved using weld current pulsing.

An experimental study of sepiolite dissolution rates and mechanisms at 25 °C

The steady-state dissolution rates of sepiolite were measured as a function of pH from mixed-flow reactor experiments at 25 °C in both citrate bearing and citrate-free aqueous solutions. Dissolution at pH ≤ 5.5 and pH ≥ 9.18 was found to be non-stoichiometric, with relatively more Mg being released at low pH, while Si was preferentially released at high pH. The steady-state dissolution rate of sepiolite at 25 °C, based on Si release rates at far from equilibrium conditions, r+ in mol/cm2/s at pH ≥ 4.44 can be described by.r+=10-15.291aH+2/aMg2+1/8,where ai refers to the activity of the subscripted aqueous species. This rate equation is based on a dissolution mechanism by which interstitial Mg is exchanged for 2H+, followed by the rate limiting release of partially detached Si-tetrahedra. At pH ≤ 4.44 and in citrate-free aqueous solutions, sepiolite dissolution rates based on Si release are similar to those measured for amorphous SiO2 despite the fact that the bulk fluid phase was undersaturated with respect to this solid. In contrast, in citrate bearing aqueous solutions, the Si release rate increases with decreasing pH following a trend consistent with the corresponding higher pH values. This difference is attributed to the increase of amorphous SiO2 dissolution rates in citrate bearing aqueous fluids, preventing the formation of substantial SiO2-rich surface layers. To further examine the extent of non-stoichiometric dissolution and its implications on solid phase transformations, batch experiments were performed in citrate bearing aqueous solutions at pH 2.57, 3.40 and 4.31. During these longer term experiments the fluid phase attained saturation with respect to amorphous SiO2. From mass balance calculations, Energy-Dispersive X-ray spectroscopy (EDS) and X-Ray powder Diffraction (XRD), it can be inferred that after 688 hours, 98% of the Mg was removed from the solid structure during pH 2.57 batch experiments, while SiO2 was retained in an amorphous solid phase, demonstrating the independence of the Mg compared to Si release to the aqueous solution.

Design and development of nanoceramic filter as point of use water filter

World Health Organisation (WHO) reports that one sixth of the world’s population does not have the access to safe water. The recent advancement of science paves many routes to provide secured water, in which nanotechnology plays a very vital role by providing many low cost ways of purification and disinfection of drinking water. The aim of the present work is to design silver embedded nanoceramic porous water purifier using clay, rice husk, and silver nitrate at a low cost measure. The synthesised nanoparticles in the present experiment was characterised and confirmed by UV-Visible spectrometry, Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and x-ray powder diffraction (XRD). From the analysis it was found that the leaching of silver from the ceramic porous disc was below the values of WHO standards. The antimicrobial activity of the disc was assessed against E. coli and found to be very effective.

Phase Composition and Microstructure of UHPHT Vein Glass from Giant Diamondiferous Kara Impact Crater by Raman Mapping

2D and 3D Raman mapping allows to observe “in situ” distribution of phases and relationship of minerals in rock samples, different mineral aggregates, mineral inclusions within crystals and other quantitative spectroscopic studies of mineral substances and materials. The method is realized in accumulating and processing of big data array of Raman spectra (RS) from selected areas of a studied sample with subsequent visualization in XY plane at 2D mapping or in the form of 3D experimental models with XYZ coordinates in a case of 3D Raman mapping. During the mapping different analytical data can be visualized as maps such as spatial distribution of mineral phases, degrees of their crystallinity, orientation of crystallites and their size, residual tension in minerals and inclusions and many other parameters. As 3D Raman mapping demands higher requirements to quality of samples, takes significantly long time expenditure and big data for processing, 2D Raman mapping looks to be the most effective for different mineralogical applications. In this work we demonstrate advantages of 2D Raman mapping on the example of studying of the impact ultrahigh-pressure high-temperature (UHPHT) vein glasses with melt-crystallized ultrahigh-pressure silica phase – coesite, for the first time found within diamondiferous impactites of the giant Kara meteorite crater. The mapping was produced with processing of typical spectra ranges of recognized mineral phases met in analyzed areas. As a result of the conducted studies it has been established what according to spectroscopic data coesite hangs to central parts of UHPHT silica glass located in general matrix of aluminosilicate glass. The sites of silicate glass are characterized by fully amorphous state that is obviously shown in its typical ranges. The areas with a high luminescence correspond to inclusions of smectite micro-drops in UHPHT silica glass isolations that has been confirmed with the accompanying study with use of electron probe microanalysis (EPMA), energy dispersive spectroscopy (EDS) and electron diffraction (ED). The used 2D Raman mapping to the impact vein glasses of the Kara meteorite crater allowed to reveal distribution of mineral phases in UHPHT glass, showing distribution of amorphous and crystalline phases that is undoubted advantage of the Raman spectroscopy. In full text of the paper technical features of Raman 2D mapping are shown that can be useful for similar mineral objects and materials with complex phase structure and different degree of ordering.