O. V. Belousov, N. V. Belousova, R. V. Borisov, A. M. Zhizhaev
{"title":"Hydrothermal Synthesis and Structural Characteristics of Nickel−Platinum Bimetallic Powders","authors":"O. V. Belousov, N. V. Belousova, R. V. Borisov, A. M. Zhizhaev","doi":"10.1134/S0036023625600467","DOIUrl":"10.1134/S0036023625600467","url":null,"abstract":"<p>The co-reduction of platinum and nickel complex compounds with hydrazine hydrate in alkaline aqueous ammonia solutions was studied under hydrothermal autoclave conditions. It was established that quantitative precipitation of nickel and platinum occurred within 1 h at a temperature of 110°C. All phases formed upon the reduction had fcc lattices and ferromagnetic behavior. The formation of nickel−platinum substitutional solid solutions was proved by powder X-ray diffraction. The nickel to platinum molar ratio was varied from 16 : 1 to 0.5 : 1, and in all cases, two phases of the nickel−platinum substitutional solid solution were detected, namely, a phase of variable composition depending on the initial molar ratio of nickel and platinum with a lattice parameter of 3.622−3.772 Å, which corresponds to 25–62 at % platinum, and a platinum-enriched phase (90–95 at %) with almost invariable composition and a lattice parameter of 3.885–3.901 Å. For molar ratios from 16 : 1 to 1 : 1, in addition to two solid solution phases, a nickel metal phase with a crystal lattice parameter of 3.527 Å was clearly seen. When the initial ratio of nickel to platinum was 0.5 : 1, no nickel metal phase was found. Under hydrothermal conditions, nickel dissolved in 1 M hydrochloric acid, while solid solutions were chemically and structurally stable.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"70 4","pages":"489 - 496"},"PeriodicalIF":1.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. N. Smirnova, G. D. Nipan, G. E. Nikiforova, G. A. Buzanov, D. F. Kondakov, A. A. Arkhipenko
{"title":"Perovskite-Like Solid Solution in BaO–Sc2O3–CuO–MoO3 System","authors":"M. N. Smirnova, G. D. Nipan, G. E. Nikiforova, G. A. Buzanov, D. F. Kondakov, A. A. Arkhipenko","doi":"10.1134/S0036023624603775","DOIUrl":"10.1134/S0036023624603775","url":null,"abstract":"<p>In the quasi-quaternary system BaO–Sc<sub>2</sub>O<sub>3</sub>–CuO–MoO<sub>3</sub>, the possibility of obtaining phases with perovskite structure was investigated by varying the chemical composition, temperature, and annealing atmosphere. A perovskite-like solid solution Ba<sub>4</sub>Sc<sub>2</sub>CuMoO<sub>11</sub> with tetragonal structure was obtained by the gel combustion method followed by annealing in argon atmosphere at 900°C. Low-enthalpy solid-phase transformations of Ba<sub>4</sub>Sc<sub>2</sub>CuMoO<sub>11</sub> at 810–820 and 960–975°C were found by DTA-TG.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"70 4","pages":"582 - 585"},"PeriodicalIF":1.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. P. Zharkov, O. V. Filimonova, Yu. S. Petrova, A. V. Pestov, L. K. Neudachina
{"title":"Protolytic and Complexing Properties of N-(2-Hydroxyethyl)-Iminodipropionic Acid in Aqueous Solution","authors":"G. P. Zharkov, O. V. Filimonova, Yu. S. Petrova, A. V. Pestov, L. K. Neudachina","doi":"10.1134/S0036023625600492","DOIUrl":"10.1134/S0036023625600492","url":null,"abstract":"<p>Acid dissociation constants of functional groups in N-(2-hydroxyethyl)iminodipropionic acid have been determined by alkalimetric titration in aqueous solution with pH-potentiometric indication at <i>I</i> = 0.1 mol/L (KCl/KNO<sub>3</sub>) and <i>t</i> = 25 ± 1°C: p<i>K</i><sub>a0</sub> = 2.87 ± 0.02, p<i>K</i><sub><i>a</i>1</sub> = 4.00 ± 0.02, and p<i>K</i><sub><i>a</i>2</sub> = 9.25 ± 0.01. Complex formation of the compound with transition metal ions has been studied. It has been shown that the presence of 2-hydroxyetyl substituent in iminodipropionic acid leads to considerable decrease of stability of complexes with copper(II) and nickel(II), whereas the stability of coordination compounds with cobalt(II), zinc(II), and cadmium(II) slightly increases. Complexes with silver(I) cations exhibit relatively high stability. Assumptions on the structure of the studied complexes has been made on the basis of the data obtained.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"70 4","pages":"586 - 592"},"PeriodicalIF":1.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. V. Klimova, Z. A. Mikhaylovskaya, E. S. Buyanova, E. A. Pankrushina, S. A. Petrova
{"title":"Structure and Properties of Cation-Deficient Bismuth- and Vanadium-Containing CaMoO4-Base Solid Solutions","authors":"A. V. Klimova, Z. A. Mikhaylovskaya, E. S. Buyanova, E. A. Pankrushina, S. A. Petrova","doi":"10.1134/S0036023625600480","DOIUrl":"10.1134/S0036023625600480","url":null,"abstract":"<p>The paper is concerned with the synthesis, determination of structural features, electrical conductivity, and pigment characteristics of cation-deficient scheelite-type Ca<sub>1 − 1.5<i>x – y</i></sub>Bi<sub><i>x + y</i></sub>Φ<sub>0.5<i>x</i></sub>Mo<sub>1</sub> <sub><i>– y</i></sub>V<sub><i>y</i></sub>O<sub>4</sub> (where Φ stands for a vacancy) solid solutions. The prepared complex oxides were studied by X-ray powder diffraction and Raman spectroscopy. The concentration ranges of existence were determined for phases with differently ordered arrangement of elements in the calcium sublattice. The total electrical conductivity of the compounds was studied by impedance spectroscopy in the temperature range 400–650°C. Electrical conductivity versus inverse temperature Arrhenius plots were constructed and analyzed. The color coordinates of the solid solutions were calculated from diffuse light scattering data of powders.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"70 4","pages":"505 - 514"},"PeriodicalIF":1.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. A. Fisenko, I. A. Solomatov, N. P. Simonenko, Ph. Yu. Gorobtsov, T. L. Simonenko, E. P. Simonenko
{"title":"Synthesis of Nano-Sized SnO2 by Direct Chemical Precipitation Using Tin(II) Chloride","authors":"N. A. Fisenko, I. A. Solomatov, N. P. Simonenko, Ph. Yu. Gorobtsov, T. L. Simonenko, E. P. Simonenko","doi":"10.1134/S0036023625600522","DOIUrl":"10.1134/S0036023625600522","url":null,"abstract":"<p>The process of synthesizing nano-sized SnO<sub>2</sub> by direct chemical precipitation using tin(II) chloride and hydrogen peroxide was investigated. The thermal behavior of the obtained powders was studied using simultaneous thermal analysis (TGA/DSC). The impact of H<sub>2</sub>O<sub>2</sub> concentration in the reaction system on the set of functional groups in the materials was demonstrated using IR spectroscopy, while X-ray powder diffraction analysis was utilized to examine the crystalline structure of the powders, including the thermal transformation of tin(II) oxyhydroxide. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed to show the effect of the reaction system composition on the size of primary particles and the agglomerates formed. In particular, it was established that with an increase of H<sub>2</sub>O<sub>2</sub> concentration, both the size of the primary particles and the agglomerates decrease. The roughness of the films formed from the obtained nanopowders was studied using atomic force microscopy (AFM). Kelvin probe force microscopy (KPFM) was used to construct surface potential distribution maps for the obtained materials and to evaluate the electron work function from their surface.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"70 4","pages":"497 - 504"},"PeriodicalIF":1.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. B. Shishmakov, Yu. V. Mikushina, O. V. Koryakova
{"title":"Synthesis of TiO2 Nanopowders by Thermal Decomposition of a Titanium Peroxo Complex in the Presence of an NaCl Template","authors":"A. B. Shishmakov, Yu. V. Mikushina, O. V. Koryakova","doi":"10.1134/S0036023625600455","DOIUrl":"10.1134/S0036023625600455","url":null,"abstract":"<p>Disperse titanium dioxide was prepared by the thermal decomposition (700°C) of a titanium peroxo complex in the presence of a sodium chloride template at various precursor/template ratios. Comparative analysis was carried out against titanium dioxide prepared in the absence of templates. The prepared titanium dioxide was represented by two crystalline phases: anatase and rutile. The synthesis of nanosized TiO<sub>2</sub> in the presence of sodium chloride yielded an aggregate of spherical TiO<sub>2</sub> grains with an average diameter of 19 nm. The major crystalline phase was anatase (>90%). The increasing NaCl content in the initial mixture brought about an increase in the proportion of the <15 nm grain fraction, an increase in the proportion of the anatase phase, and an increase in the specific surface area <i>S</i><sub>sp</sub>.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"70 4","pages":"616 - 623"},"PeriodicalIF":1.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Features of Changes in Composition and Structures of Rare-Earth Halide Complexes with Acethylurea","authors":"P. V. Akulinin, E. V. Savinkina, M. S. Grigoriev","doi":"10.1134/S0036023625600571","DOIUrl":"10.1134/S0036023625600571","url":null,"abstract":"<p>Structures of rare-earth halide complexes with acetylurea (AcUr), [Sm(AcUr)<sub>2</sub>(H<sub>2</sub>O)<sub>5</sub>]Cl<sub>3</sub>, [Eu(AcUr)<sub>2</sub>(H<sub>2</sub>O)<sub>5</sub>]Br<sub>3</sub>·H<sub>2</sub>O, [Ln(AcUr)<sub>2</sub>(H<sub>2</sub>O)<sub>4</sub>]Br<sub>3</sub>·H<sub>2</sub>O (Ln = Tm, Yb), and [Lu(AcUr)(H<sub>2</sub>O)<sub>6</sub>]Br<sub>3</sub> were determined. Analysis of compositions and structures of these compounds along with the earlier reported analogs allowed us to consider the features of their changes depending on the atomic number of the element. The size of the central atom was found to be the decisive factor.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"70 4","pages":"521 - 529"},"PeriodicalIF":1.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. G. Gagarin, A. V. Guskov, V. N. Guskov, K. S. Gavrichev
{"title":"Synthesis, High-Temperature Heat Capacity, and Thermal Conductivity of Multi-Component Rare-Earth Zirconates","authors":"P. G. Gagarin, A. V. Guskov, V. N. Guskov, K. S. Gavrichev","doi":"10.1134/S0036023624603878","DOIUrl":"10.1134/S0036023624603878","url":null,"abstract":"<p>Multicomponent single-phase rare earth zirconates LaGdZr<sub>2</sub>O<sub>7</sub>, (LaSmGd)<sub>2/3</sub>Zr<sub>2</sub>O<sub>7</sub>, (LaSmGdY)<sub>1/2</sub>Zr<sub>2</sub>O<sub>7</sub>, (LaNdSmGdY)<sub>2/5</sub>Zr<sub>2</sub>O<sub>7</sub> of the pyrochlore structure were synthesized. The isobaric heat capacity at 300–1800 K and thermal diffusivity were measured. The thermal conductivity of non-porous samples in the range of 300–1300 K was calculated.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"70 4","pages":"559 - 566"},"PeriodicalIF":1.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. G. Cherkasov, Y. S. Klimova, V. V. Danilina, K. K. Ilin, K. E. Zubarev
{"title":"Polythermal Study of the Phase Equilibria, Solubility, and Critical Phenomena in the Cesium Nitrate–Water–Polyethylene Glycol-1500 Ternary System","authors":"D. G. Cherkasov, Y. S. Klimova, V. V. Danilina, K. K. Ilin, K. E. Zubarev","doi":"10.1134/S0036023625600510","DOIUrl":"10.1134/S0036023625600510","url":null,"abstract":"<p>The phase equilibria and solubility in component mixtures were studied by the visual polythermal method in ten sections of the composition triangle in the temperature range of 10–110°C for the cesium nitrate–water–polyethylene glycol 1500 ternary system. Using the method of the volume ratio of liquid phases, the temperature of formation of the critical node of the monotectic state (78.8°C) and the temperature dependence of the compositions of solutions corresponding to the critical solubility points of the phase separation region were determined. The isothermal phase diagrams for this ternary system were constructed at 10.0, 25.0, 40.0, 50.0, 78.8, 90.0, and 100.0°C, and the solubility of the components was determined. It was found that in the range of 10.0–40.0°C, a triangle for the eutonic state exists in the isothermal diagrams. Above the phase separation onset temperature (78.8°C), a monotectic triangle with adjacent saturated solution and phase separation fields is present in the isotherms. The partition coefficients of polyethylene glycol 1500 between the equilibrium liquid phases of the monotectic state were calculated in the range of 78.8–100.0°C. It was shown that cesium nitrate is effective as a salting-out agent for polyethylene glycol 1500 at temperatures above 90.0°C. At all temperatures of the indicated range, polyethylene glycol 1500 considerably decreases the solubility of cesium nitrate in water.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"70 4","pages":"573 - 581"},"PeriodicalIF":1.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Thermodynamic Modeling of Phase-Formation Conditions in the Si–O–C–H–He and Si–O–C–H–N–He Systems","authors":"V. A. Shestakov, M. L. Kosinova","doi":"10.1134/S003602362560039X","DOIUrl":"10.1134/S003602362560039X","url":null,"abstract":"<p>Thermodynamic modeling of film synthesis from the vapor phase in the Si–O–C–H–He and Si–O–C–H–N–He systems involving the decomposition of hexamethyldisiloxane (HMDSO) was performed. The calculation of chemical equilibria used in the modeling involved the minimization of the Gibbs energy of the system, implemented using the electronic materials database (EMDB). It was shown that various phase complexes containing silicon oxide, silicon carbide, and silicon nitride can be produced by CVD processes of these systems. The results of the thermodynamic modeling can be useful for developing methods for the synthesis of film coatings based on these phase complexes.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"70 4","pages":"567 - 572"},"PeriodicalIF":1.5,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}