{"title":"Special Grain Boundaries in Multicomponent Crystals with a Cubic Structure","authors":"B. M. Darinskiy, A. S. Prizhimov, A. A. Surkova","doi":"10.1134/S1063774526601139","DOIUrl":"10.1134/S1063774526601139","url":null,"abstract":"<p>Special grain boundaries in centrosymmetric cubic crystals have been classified on the basis of the symmetrical properties of flat lattices, which are the crystallographic planes of the crystals. Possible types of flat cells of the crystal planes have been indicated based on the half-integer Wyckoff positions for the primitive cubic, fcc, and bcc lattices. The regularities of the variations in the atomic structure and elemental composition of grain boundaries under alternation of atomic planes in crystals with cells of complex elemental composition have been established .</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 3","pages":"360 - 365"},"PeriodicalIF":0.5,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. A. Shibkov, M. F. Gasanov, A. A. Denisov, A. E. Zolotov, S. S. Kochegarov
{"title":"Study of Stress Corrosion of Aluminum Alloy by Acoustic Emission Method","authors":"A. A. Shibkov, M. F. Gasanov, A. A. Denisov, A. E. Zolotov, S. S. Kochegarov","doi":"10.1134/S1063774526601231","DOIUrl":"10.1134/S1063774526601231","url":null,"abstract":"<p>Acoustic emission and high-speed video recording were used to study the kinetics of surface corrosion of a deformed aluminum-magnesium alloy in a hydrochloric acid solution. It was found that the dynamics of numerous hydrogen bubbles released during a chemical reaction was accompanied by the generation of an acoustic emission signal in the form of broadband transient noise. The evolution of the acoustic signal dispersion, which was found to correlate with the rate of the corrosion process, is a measure of this transient behavior. The mechanisms of acoustic emission and the issues of predicting the loss of mechanical stability and the initiation of the Portevin–Le Chatelier effect in an aluminum alloy deformed in a chemically aggressive environment are discussed.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 3","pages":"366 - 375"},"PeriodicalIF":0.5,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. F. Turaev, O. S. Kakhkhorov, M. Z. Sharipov, N. M. Nazarova, O. E. Abdurakhmonov, Z. Matkarimov, Sh. Abdurakhmonov, M. K. Kurbanov, D. S. Saidov, M. S. Paizullakhanov, S. Abduraimov, M. Pirimmatov, B. E. Egamberdiev, U. B. Sharopov
{"title":"Effect of Precursors on the Stoichiometry and Morphology of Cobalt Ferrites","authors":"A. F. Turaev, O. S. Kakhkhorov, M. Z. Sharipov, N. M. Nazarova, O. E. Abdurakhmonov, Z. Matkarimov, Sh. Abdurakhmonov, M. K. Kurbanov, D. S. Saidov, M. S. Paizullakhanov, S. Abduraimov, M. Pirimmatov, B. E. Egamberdiev, U. B. Sharopov","doi":"10.1134/S1063774525601637","DOIUrl":"10.1134/S1063774525601637","url":null,"abstract":"<p>The influence of precursors and the nominal CoO:Fe<sub>2</sub>O<sub>3</sub> ratio on the stoichiometry and morphology of cobalt ferrites was investigated. The alloys were produced by directed solar melting at the focus of the Big Solar Furnace followed by water quenching. The microstructure was studied using transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM), while the local composition was analyzed by energy-dispersive X-ray spectroscopy (EDS). It was shown that variation of the Co/Fe ratio determines the particle size, degree of agglomeration, and structural ordering. For compositions close to CoFe<sub>2</sub>O<sub>4</sub>, more homogeneous structures are formed with a higher degree of crystallinity. Control of the melting/quenching regime stabilizes the particle size distribution. The established “precursors–composition–morphology” relationships confirm the reproducibility of solar synthesis and enable targeted selection of the initial CoO and Fe<sub>2</sub>O<sub>3</sub> ratios and molar fractions to align the local stoichiometry with the desired nominal composition.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 2","pages":"331 - 338"},"PeriodicalIF":0.5,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148336775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. E. Rabadanova, S. Kh. Gadzhimagomedov, D. K. Palchaev, M. Kh. Rabadanov, A. A. Antsiferova, A. A. Bush, Zh. Kh. Murlieva, Sh. P. Faradzhev, R. M. Emirov, N. M.-R. Alikhanov
{"title":"Restoring the Orthorhombic Structure and Improving the Superconducting Properties of Textured YBCO Superconductors after 25 Years of Storage","authors":"A. E. Rabadanova, S. Kh. Gadzhimagomedov, D. K. Palchaev, M. Kh. Rabadanov, A. A. Antsiferova, A. A. Bush, Zh. Kh. Murlieva, Sh. P. Faradzhev, R. M. Emirov, N. M.-R. Alikhanov","doi":"10.1134/S1063774526600080","DOIUrl":"10.1134/S1063774526600080","url":null,"abstract":"<p>The effect of thermal exposure of textured YBCO ceramics on its structure and properties after long-term (25 years) storage at room temperature has been studied. Effective restoration of the orthorhombic structure and improvement of the superconducting properties of YBCO ceramics via its saturation with O<sub>2</sub> at 500°C for 10 h using powders of the same composition with an optimum oxygen content have been demonstrated. The 00<i>l</i>-type reflections 001, 002, 003, 004, 005, 006, 007, 008, and 009 revealed by X-ray diffraction analysis are indicative of a high degree of texturing of the ceramics. Oxygen saturation of the ceramic samples leads to a change in the conductivity type from semiconductor to metallic. It has been established that, with an increase in the degree of oxygen saturation, the intensity of the O(4) mode at 500 cm<sup>–1</sup> and the mode at 340 cm<sup>–1</sup> corresponding to vibrations of O(2)/O(3) atoms in the CuO<sub>2</sub> planes significantly increase.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 2","pages":"298 - 305"},"PeriodicalIF":0.5,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148336853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Z. Xing, Y. Yang, F. Li, H. Chen, R. Wang, D. Yang, M. H. Han, J. Li, O. P. Taran
{"title":"Preparation of Corn Stalk Charcoal Composite Film and Study on Its NH3 Adsorption Performance","authors":"Z. Xing, Y. Yang, F. Li, H. Chen, R. Wang, D. Yang, M. H. Han, J. Li, O. P. Taran","doi":"10.1134/S106377452660002X","DOIUrl":"10.1134/S106377452660002X","url":null,"abstract":"<p>This study utilized corn stover as the biomass feedstock to produce stover charcoal (CC) through modification with oxalic acid. The charcoal was then composited with polyvinylidene fluoride (PVDF) using a coating-crosslinking method, resulting in CC/PVDF composite membranes. By optimizing key parameters including crosslinking agent concentration, crosslinking time, and charcoal loading, a composite membrane with outstanding ammonia adsorption performance was obtained. The membrane’s morphology, chemical composition, and mechanical properties were characterized by scanning electron microscopy, infrared spectroscopy, and a universal testing machine. The results indicate that the optimal ammonia adsorption capacity of 40.4 mg/cm<sup>2</sup> was achieved under the following conditions: a binder ratio of 1 : 2, a crosslinking agent concentration of 3%, and a crosslinking time of 90 min. After regeneration with ethanol, the membrane retained 69.3% of its initial ammonia adsorption capacity. Furthermore, compared to the original stover charcoal, the composite membrane surface incorporated additional oxygen-containing functional groups (e.g., carboxyl and hydroxyl groups), which contributed to its enhanced ammonia adsorption and removal.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 2","pages":"237 - 246"},"PeriodicalIF":0.5,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148336772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ionic Conductivity of CeF3 Crystals Produced by Gradient Melt Freezing under Temperature Exposure in Vacuum","authors":"N. I. Sorokin, D. N. Karimov","doi":"10.1134/S1063774526601152","DOIUrl":"10.1134/S1063774526601152","url":null,"abstract":"<p>Applying the technique of gradient melt freezing in a fluorinating atmosphere, large single-phase blocks of cerium fluoride crystals with a characteristic brown color, associated with quenching of point defects, were fabricated, and the influence of the formed color centers on the optical transmission and ionic conductivity of CeF<sub>3</sub> during thermal heating in a vacuum was studied. The material under study crystallizes in the sp. gr. <span>(Pbar {3}c1)</span> and is characterized by additional optical absorption in the wavelength range of 350−650 nm, caused by the formation of color centers. Annealing of CeF<sub>3</sub> at temperatures up to 827 K leads to thermal destruction of defect centers and release of fluorine vacancies, which causes an increase in the ionic conductivity of the crystals by ∼2 times as compared to the initial level, reaching a value of σ<sub>dc</sub> = 3.5 × 10<sup>−4</sup> S/cm (500 K), while maintaining the ion-transfer activation enthalpy Δ<i>H</i><sub>a</sub> = 0.37 eV. The obtained results can be used to develop modes of post-growth thermal annealing of Се<sup>3+</sup>-based crystalline materials.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 2","pages":"256 - 262"},"PeriodicalIF":0.5,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148336773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. F. Turaev, O. S. Kakhkhorov, M. Z. Sharipov, N. M. Nazarova, O. E. Abdurakhmonov, M. K. Kurbanov, D. S. Saidov, A. S. Komolov, I. A. Pronin, B. E. Egamberdiyev, U. B. Sharopov
{"title":"Electronic and Crystal Structure of Cobalt Ferrite Alloys Synthesized by Concentrated Solar Heating","authors":"A. F. Turaev, O. S. Kakhkhorov, M. Z. Sharipov, N. M. Nazarova, O. E. Abdurakhmonov, M. K. Kurbanov, D. S. Saidov, A. S. Komolov, I. A. Pronin, B. E. Egamberdiyev, U. B. Sharopov","doi":"10.1134/S1063774525601467","DOIUrl":"10.1134/S1063774525601467","url":null,"abstract":"<p>The results of a comprehensive study of the electronic and crystal structure of cobalt ferrite alloys (CoFe<sub>2</sub>O<sub>4</sub>) synthesized by solar melting are presented. Using X-ray phase analysis and the Rietveld refinement method, the crystal lattice parameters were determined and secondary phases of CoO and Fe<sub>2</sub>O<sub>3</sub> were identified. Electron density mapping was performed, which allowed us to establish the nature of the Co–O and Fe–O bonds, as well as to identify the covalent component in the crystal lattice. The data obtained indicate the influence of CoFe<sub>2</sub>O<sub>4</sub> composition on the symmetry, phase purity, and electron density distribution.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 2","pages":"324 - 330"},"PeriodicalIF":0.5,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148336774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. A. Komornikov, N. E. Novikova, A. V. Gudymenko, I. S. Timakov, I. A. Verin, A. E. Voloshin
{"title":"A Family of Crystals of Ethylenediamine Complexes of Copper(II) Chloride","authors":"V. A. Komornikov, N. E. Novikova, A. V. Gudymenko, I. S. Timakov, I. A. Verin, A. E. Voloshin","doi":"10.1134/S1063774526600158","DOIUrl":"10.1134/S1063774526600158","url":null,"abstract":"<p>In the CuCl<sub>2</sub>–NH<sub>2</sub>(CH<sub>2</sub>)<sub>2</sub>NH<sub>2</sub>–H<sub>2</sub>O system, a family of crystals Cu(NH<sub>2</sub>(CH<sub>2</sub>)NH<sub>2</sub>)Cl<sub>2</sub>, Cu(NH<sub>2</sub>(CH<sub>2</sub>)<sub>2</sub>NH<sub>2</sub>)<sub>2</sub>Cl<sub>2</sub>⋅H<sub>2</sub>O, and Cu(NH<sub>2</sub>(CH<sub>2</sub>)<sub>2</sub>NH<sub>2</sub>)<sub>3</sub>Cl<sub>2</sub>⋅2H<sub>2</sub>O was obtained. X-ray diffraction analysis of all three compounds was carried out. It has been established that, depending on the ratio of copper chloride and ethylenediamine in the solution during synthesis, different coordination environments of copper are formed: square-planar and octahedral, in which different ligands are involved. The optical transmission spectra and thermal properties of the grown crystals were studied.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 2","pages":"188 - 198"},"PeriodicalIF":0.5,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148336776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. K. Rastsvetaeva, V. M. Gridchina, N. V. Chukanov, S. M. Aksenov
{"title":"Dissymmetrization in Labuntsovite-Group Minerals. I: Features of Cation Ordering over Sites of the Crystal Structure of Tsepinite-K within the Pm Model","authors":"R. K. Rastsvetaeva, V. M. Gridchina, N. V. Chukanov, S. M. Aksenov","doi":"10.1134/S1063774525601881","DOIUrl":"10.1134/S1063774525601881","url":null,"abstract":"<p>An X-ray structural analysis of tsepinite-K from the pegmatite no. 62, Karnasurt Mountain, Lovozero alkaline massif (Kola Peninsula), was performed. The mineral belongs to the labuntsovite group and differs from other its representatives in a “combined” structural type (partial occupancy of the key <i>D</i> position). Its structure was previously studied within the space group <i>Cm</i>. A repeated study of the structural features of tsepinite-K was carried out with the transition to space group <i>Pm</i>. The unit-cell parameters are <i>a</i> = 14.3265(3) Å, <i>b</i> = 13.802(2) Å, <i>c</i> = 7.783(1) Å, β = 116.949(3)°, <i>V</i> = 1371.8 Å<sup>3</sup>; <i>R</i> = 0.042 for 1677 reflections with <i>F</i> > 2σ(<i>F</i>). A more detailed ordering of cations over structure positions was established.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 2","pages":"221 - 226"},"PeriodicalIF":0.5,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148336777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Elastic Waves at the Twist Boundaries in Orthorhombic, Tetragonal, Hexagonal, and Cubic Crystals","authors":"A. N. Darinskii","doi":"10.1134/S1063774526600092","DOIUrl":"10.1134/S1063774526600092","url":null,"abstract":"<p>Criteria are established for the existence of an acoustic (Stoneley) wave in an <i>mmm</i>-symmetry medium at the twist boundary coinciding with the plane of symmetry. The results obtained are applicable to media of other symmetries in which the tensor of elastic moduli has the same structure as in the <i>mmm</i> symmetry class.</p>","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"71 2","pages":"263 - 271"},"PeriodicalIF":0.5,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148336771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}