Crystallography Reports最新文献_第8页

A Chemical Crystal-Forming System. Hierarchy of Limiting Principles of Thermodynamics 化学结晶形成系统。热力学极限原理的层次

IF 0.5 4区材料科学

Crystallography Reports Pub Date : 2025-12-26 DOI: 10.1134/S1063774524602673

V. I. Rakin

{"title":"A Chemical Crystal-Forming System. Hierarchy of Limiting Principles of Thermodynamics","authors":"V. I. Rakin","doi":"10.1134/S1063774524602673","DOIUrl":"10.1134/S1063774524602673","url":null,"abstract":"Crystal growth in a heterohomogeneous chemical system can be described phenomenologically on the basis of the limiting principle of nonequilibrium thermodynamics. However, the existence of two mutually exclusive principles—maximum (Ziegler’s principle) and minimum (Prigogine’s principle) of entropy production density—creates a problem in thermodynamic analysis of real crystallization processes. As a result of experiments, the crystallization conditions for four calcium phosphate phases—monetite, brushite, octacalcium phosphate, and hydroxyapatite—in a closed solution–gel chemical system have been established, and a mathematical model of formation of an amorphous phase of calcium phosphate, serving as a precursor for crystalline phases, has been proposed. Three stages of system development are observed. The thermodynamic systems whose development obeys the Ziegler’s and Prigogine’s principles, are implemented at three characteristic scale levels: for a diffusion column of full volume; for the edge section of the Lisegang strip or the surface of a growing crystal with a boundary zone having a thickness of no more than 0.5 mm; and for the contact region of metastable and stable structural varieties of phosphate crystals up to 10 µm thick. The development times of quasi-closed and open systems range from 1 h to several days.","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"70 7","pages":"1219 - 1232"},"PeriodicalIF":0.5,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145824367","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}

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Anomalously High Lateral Polarization in Spherulitic Thin Films of Lead Zirconate Titanate 锆钛酸铅球晶薄膜的异常高侧向极化

IF 0.5 4区材料科学

Crystallography Reports Pub Date : 2025-12-26 DOI: 10.1134/S1063774525600413

A. S. Elshin, E. D. Mishina, A. R. Valeeva, S. V. Senkevich, E. Yu. Kaptelov, M. V. Staritsyn, I. P. Pronin

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Influence of Substructural and Solid-Solution Strengthenings on the Formation of a Defect Structure in Cu–Al and Cu–Mn Alloys 亚结构和固溶强化对Cu-Al和Cu-Mn合金缺陷结构形成的影响

IF 0.5 4区材料科学

Crystallography Reports Pub Date : 2025-12-26 DOI: 10.1134/S1063774525600905

L. I. Trishkina, A. A. Klopotov, T. V. Cherkasova, A. I. Potekaev, V. I. Borodin

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Heavy Scintillators Based on Gadolinium-Containing Crystalline Fluorite Solid Solutions Activated by Ce3+ and Pr3+ Ions Ce3+和Pr3+离子活化含钆晶体萤石固溶体的重闪烁体

IF 0.5 4区材料科学

Crystallography Reports Pub Date : 2025-12-26 DOI: 10.1134/S106377452560139X

S. E. Sarkisov, V. A. Yusim, Yu. V. Pisarevsky, V. G. Golubev

{"title":"Heavy Scintillators Based on Gadolinium-Containing Crystalline Fluorite Solid Solutions Activated by Ce3+ and Pr3+ Ions","authors":"S. E. Sarkisov, V. A. Yusim, Yu. V. Pisarevsky, V. G. Golubev","doi":"10.1134/S106377452560139X","DOIUrl":"10.1134/S106377452560139X","url":null,"abstract":"In mixed crystals (solid solutions) with the fluorite structure ({text{C}}{{{text{a}}}_{{1-x}}}{text{G}}{{{text{d}}}_{x}}{{{text{F}}}_{{2 + x}}}), doped with Ce3+ and Pr3+ ions, efficient energy transfer from the matrix Gd3+ ions to the impurity rare-earth ions has been demonstrated. The process of energy transfer between Gd3+ ions and impurity ions was studied to assess the potential of the gadolinium-containing matrix as a sensitizer for Се3+ and Pr3+ ions in order to create γ-radiation scintillators. The obtained results showed that Gd3+ absorbs γ radiation and X-ray photons, increasing the emission of Се3+ and Pr3+ ions. X-ray luminescence studies with different contents (from 0.3 to 5.0 mol %) of the second matrix component GdF3 in the mixed crystal and a low concentration (0.3 mol %) of rare-earth impurity ions showed that the resonant cross-relaxation mechanism of donor–acceptor energy transfer turns into migration mechanism (through the gadolinium sublattice to the impurity ion) with an increase in the content of donor ions (Gd3+). The obtained amplitude spectra showed an increase in the light yield with increasing the Gd3+ content in the scintillator matrix.","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"70 7","pages":"1180 - 1188"},"PeriodicalIF":0.5,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145824347","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}

引用次数: 0

Weak-Field Magnetization and Crystal Structure of Co–Ni–Fe Films Formed by Electrochemical Deposition from a Chloride Electrolyte 氯化物电解液电化学沉积Co-Ni-Fe薄膜的弱场磁化和晶体结构

IF 0.5 4区材料科学

Crystallography Reports Pub Date : 2025-12-26 DOI: 10.1134/S106377452560125X

R. D. Tikhonov, G. D. Demin, A. A. Cheremisinov, M. R. Tikhonov

引用次数: 0

On the Least Number of Chemical Bonds Connecting the Structural Units in a Single Lattice Complex 关于单晶格配合物中连接结构单元的最少化学键数

IF 0.5 4区材料科学

Crystallography Reports Pub Date : 2025-12-26 DOI: 10.1134/S1063774525600310

A. M. Banaru, K. G. Seravkin, A. A. Antonov, D. A. Banaru, S. M. Aksenov

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Structural Studies of the ATP-Binding Protein EttA from the Pathogenic Bacterium Staphylococcus aureus by Small-angle X-ray Scattering 病原菌金黄色葡萄球菌atp结合蛋白EttA的小角度x射线散射结构研究

IF 0.5 4区材料科学

Crystallography Reports Pub Date : 2025-12-26 DOI: 10.1134/S1063774525600632

A. E. Gimaletdinova, E. S. Kuchaev, V. E. Gonialin, P. V. Egorova, S. A. Ryabov, M. S. Glazyrin, N. A. Smolyanova, N. S. Garaeva, D. D. Kuklina, Yu. L. Ryzhykau, M. M. Yusupov, K. S. Usachev

{"title":"Structural Studies of the ATP-Binding Protein EttA from the Pathogenic Bacterium Staphylococcus aureus by Small-angle X-ray Scattering","authors":"A. E. Gimaletdinova, E. S. Kuchaev, V. E. Gonialin, P. V. Egorova, S. A. Ryabov, M. S. Glazyrin, N. A. Smolyanova, N. S. Garaeva, D. D. Kuklina, Yu. L. Ryzhykau, M. M. Yusupov, K. S. Usachev","doi":"10.1134/S1063774525600632","DOIUrl":"10.1134/S1063774525600632","url":null,"abstract":"ATPase EttA is the most common eubacterial protein of the ABC-F family, which facilitates the conformational transition of the ribosome from one state to another during elongation through a nucleotide-dependent interaction sensitive to the ATP/ADP ratio. Proteins of the ABC-F family confer resistance to antibiotics that bind in the peptidyltransferase center and the ribosomal tunnel; however, the details of the mechanism of action of this protein from Staphylococcus aureus are unclear. A comparison of the amino acid sequences of EttA proteins from S. aureus, Mycobacterium tuberculosis, and Escherichia coli indicates the presence of an additional 75 residues at the C-terminus of the protein, the function of which is unknown. The structure of the SaEttA protein was analyzed using small-angle X-ray scattering, which revealed a distinct domain arrangement and additional density at the C-terminus of the protein.","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"70 7","pages":"1137 - 1144"},"PeriodicalIF":0.5,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145824396","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}

引用次数: 0

Thermal Stability of Phases in TiO2/ZnO Composite Microparticles Obtained by Plasma Synthesis 等离子体合成TiO2/ZnO复合微粒中相的热稳定性

IF 0.5 4区材料科学

Crystallography Reports Pub Date : 2025-12-26 DOI: 10.1134/S1063774525601455

V. V. Krasnova, A. E. Muslimov, M. Kh. Gadzhiev, D. I. Yusupov, Y. V. Grigoriev, I. S. Volchkov, M. S. Abdulkerimov, F. F. Orudzhev, V. M. Kanevsky

{"title":"Thermal Stability of Phases in TiO2/ZnO Composite Microparticles Obtained by Plasma Synthesis","authors":"V. V. Krasnova, A. E. Muslimov, M. Kh. Gadzhiev, D. I. Yusupov, Y. V. Grigoriev, I. S. Volchkov, M. S. Abdulkerimov, F. F. Orudzhev, V. M. Kanevsky","doi":"10.1134/S1063774525601455","DOIUrl":"10.1134/S1063774525601455","url":null,"abstract":"The thermal stability of the phase composition of TiO2/ZnO composite particles during the post-growth heat treatment has been investigated. TiO2/ZnO composite particles were synthesized by processing a metallic mixture of titanium and zinc microparticles in a low-temperature arc discharge plasma in argon under ambient conditions. The obtained materials were characterized using electron microscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. It was found that the synthesized structures contain up to 40% of titanium dioxide polymorphs—anatase and brookite. During heat treatment at 300°C in air, zinc atoms are displaced from the TiO2 lattice, accompanied by structural rearrangement of the oxide matrix. Annealing at temperatures of 500–700°C leads to coarsening of most of anatase crystallites and partial recrystallization of the rest into the rutile phase. Annealing at 900°C promotes the formation of zinc titanates (Zn2TiO4 and Zn2Ti3O8), which act as catalysts for the anatase-to-rutile phase transition. Upon annealing at 950°C, the rutile monophase is stabilized in the synthesized samples. A simple and environmentally friendly method is thus proposed for the large-scale synthesis of TiO2/ZnO composite particles containing a high fraction (up to 40%) of anatase and brookite, which remain stable up to 700°C and can be effectively applied in photostimulated degradation processes of organic pollutants.","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"70 7","pages":"1170 - 1179"},"PeriodicalIF":0.5,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145824374","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}

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Effect of the SiC Film Thickness on the Morphology of Swift Heavy Ion Tracks SiC薄膜厚度对快速重离子轨道形貌的影响

IF 0.5 4区材料科学

Crystallography Reports Pub Date : 2025-12-26 DOI: 10.1134/S1063774525601133

D. I. Zainutdinov, A. E. Volkov

引用次数: 0

Investigation of the Contribution of Allotropic Modifications of Carbon to the Morphology and the Optical and Photocatalytic Properties of Nanostructured Zinc Oxide Films 碳的同素异形体修饰对纳米氧化锌膜形貌和光催化性能贡献的研究

IF 0.5 4区材料科学

Crystallography Reports Pub Date : 2025-12-26 DOI: 10.1134/S1063774525601030

I. A. Filippov, A. A. Karmanov, N. D. Yakushova, I. A. Gubich, A. S. Kitaev, I. A. Pronin

{"title":"Investigation of the Contribution of Allotropic Modifications of Carbon to the Morphology and the Optical and Photocatalytic Properties of Nanostructured Zinc Oxide Films","authors":"I. A. Filippov, A. A. Karmanov, N. D. Yakushova, I. A. Gubich, A. S. Kitaev, I. A. Pronin","doi":"10.1134/S1063774525601030","DOIUrl":"10.1134/S1063774525601030","url":null,"abstract":"Zinc oxide films doped with different allotropic modifications of carbon, such as carbon nanospheres, graphite, graphene oxide, and multilayer carbon nanotubes, were synthesized using the sol-gel technology. The scanning electron microscopy analysis of the surface morphology of the samples showed that in one of the allotropic modifications, carbon particles act as growth sites for zinc oxide branches, resulting in the hierarchically organized surface of the samples. Optical spectrophotometric measurements showed that in all cases there was a decrease in the band gap of the samples compared to undoped zinc oxide, as well as an increase in the energy of the Urbach tail, indicating an increase in the degree of energy disorder at the band edges. The observed complex non-monotonic dependence of the changes in the optical absorption of aqueous Nile blue A solutions during photocatalytic degradation may indicate the formation of stable intermediates, as confirmed by IR spectroscopy.","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"70 7","pages":"1208 - 1218"},"PeriodicalIF":0.5,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145824366","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}

引用次数: 0