Article
Chemistry, Inorganic & Nuclear
Philippe Lacorre, Antoine Pautonnier, Sandrine Coste, Maud Barre, Emilie Bechade, Emmanuelle Suard
Summary: This study investigated the structural features of both ordered and disordered forms of La2SiMoO8, revealing a tridimensional ordering in the ordered form and stacking faults between 2D ordered layers in the disordered form.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Kaupo Kukli, Lauri Aarik, Guillermo Vinuesa, Salvador Duenas, Helena Castan, Hector Garcia, Aarne Kasikov, Peeter Ritslaid, Helle-Mai Piirsoo, Jaan Aarik
Summary: Thin films of hafnium-praseodymium oxide grown by atomic layer deposition show different crystal structure and electrical properties compared to undoped HfO2 films. Pr-doped films exhibit higher relative permittivities and stable resistance state currents, with potential for reduced power consumption and promising application prospects.
Article
Crystallography
Ekaterina I. Orlova, Timofei A. Sorokin, Vladimir B. Kvartalov, Alexander M. Antipin, Nataliya E. Novikova, Elena P. Kharitonova, Nataliya I. Sorokina, Olga A. Alekseeva, Valentina I. Voronkova
Summary: Rare-earth fluorine-containing molybdates of the Ln(5)Mo(3)O(16+delta) family with the LiLa4Mo3O15F composition were synthesized for the first time as single crystals by the flux method. X-ray diffraction analysis revealed that fluorine atoms replace over-stoichiometric oxygen positions, leading to enhanced interstitial conductivity.
Article
Crystallography
Nataliya E. Novikova, Ekaterina I. Orlova, Alexander M. Antipin, Timofei A. Sorokin, Vladimir B. Kvartalov, Elena P. Kharitonova, Nataliya I. Sorokina, Olga A. Alekseeva, Valentina I. Voronkova
Summary: Rare-earth sodium- and fluorine-substituted molybdates were synthesized as single crystals for the first time. X-ray diffraction analysis revealed that the obtained crystals have the same structure as the undoped cubic compounds, and the partial substitution of fluorine atoms affects the transport characteristics of the compounds.
Article
Chemistry, Physical
Victoria G. Grossman, Maxim S. Molokeev, Bair G. Bazarov, Jibzema G. Bazarova
Summary: New triple molybdates M5CrHf(MoO4)6 (M = K, Tl) and TlCrHf0.5(MoO4)3 were discovered in the ternary molybdate systems M2MoO4-Cr2(MoO4)3-Hf(MoO4)2 (M = K, Tl) in the subsolidus region. The crystal structures were refined and their thermal stability and electrical conductivity were investigated, showing high values for the former and relatively low values for the latter.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Juchao Liu, Wanpeng Chen, Xuebin Hu, Hainan Wang, Yijie Zou, Qiang He, Jun Ma, Caihong Liu, Yao Chen, Xiaoliu Huangfu
Summary: The study found that different crystal structured MnO2 have varying adsorption and oxidation reactivity towards Tl(I), with α-MnO2 showing the strongest oxidation ability and β-MnO2 hardly oxidizing Tl(I). Additionally, the sorption of Tl(I) affected the crystallinity of MnO2.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Victoria G. Grossman, Maxim S. Molokeev, Jibzema G. Bazarova, Bair G. Bazarov
Summary: A series of novel potassium-thallium silicotungstate oxides were successfully synthesized by solid state reaction, showing a continuous solid solution series with increasing unit-cell parameters linearly with composition due to thallium substitution for potassium. The highest total conductivity was found for Tl5Mg0.5Hf1.5(MoO4)(6) at 831K, exceeding the parent potassium magnesium hafnium molybdate.
SOLID STATE SCIENCES
(2022)
Article
Chemistry, Inorganic & Nuclear
Victoria G. Grossman, Maxim S. Molokeev, Jibzema G. Bazarova, Bair G. Bazarov, Nikolay Sorokin
Summary: Thallium scandium hafnium molybdate and thallium scandium zirconium molybdate crystallize in trigonal symmetry with the space group R (3) over barc. The crystal structures were obtained by Rietveld method, and the ionic conductivities were measured at different temperatures. The results showed that the molybdates have different ionic conductivities at 773K, with activation energies of 0.8 eV and 0.3 eV respectively.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Bole Chen, Gennady L. Gutsev, Dengfeng Li, Kewei Ding
Summary: This study investigates boron clusters of the PrBn series in both neutral and anionic states using CALYPSO structure predictions and DFT calculations. The results show that the medium-size Pr-doped boron clusters have a half-sandwich geometrical topology, contrary to TM-doped boron clusters. The stability of PrBn clusters is attributed to the interactions between Pr 5d and B 2p orbitals. Furthermore, a tubular-shaped PrB30 cluster is proposed as a promising building block for boron-based nanotubes.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Evgeniya S. Zolotova, Sergey F. Solodovnikov, Zoya A. Solodovnikova, Vasiliy N. Yudin, Nikolai F. Uvarov, Aleksandr S. Sukhikh
Summary: This study examines the composition, thermal stability, crystal structure, and flux crystallization features of double molybdates of alkali metals with zirconium or hafnium. The results indicate that alkaline polymolybdates are optimal fluxes for crystallization of the double molybdates, and suggest that the ionic conductivity of these polymolybdates is due to the transfer of oxide ions. Additionally, measurements of electrical conductivity show that the highest values are achieved for Cs2Mo2O7, with a sigma value of 1.2.10(-4) S/cm at 460 degrees C.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Wyllamanney da S. Pereira, Julio C. Sczancoski, Elson Longo
Summary: The effects of temperature and reaction time on the structural, morphological, and optical properties of BaMoO4 and BaWO4 were investigated. Morphological changes were found to manipulate photoluminescence emissions from blue to red, specifically in BaWO4. The proposed method has the potential to grow hierarchical structures of tungstates/molybdates with improved optical properties.
Article
Chemistry, Inorganic & Nuclear
V Sydorchuk, S. Khalameida, N. Shcherban, V Hreb, V Mykhaylyk, Y. Zhydachevskyy, L. Vasylechko
Summary: Mixed orthovanadates Bi1-xPrxVO4 were synthesized and studied for their photocatalytic activity in safranin T degradation in aqueous solutions under visible irradiation. The materials with 4% praseodymium and monoclinic structure exhibit the highest activity due to the inhibitory effect on charge carrier recombination at the interfacial heterojunction.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Kesar Tandekar, Neeraj Kumar Mishra, Sabbani Supriya
Summary: This passage describes the remarkable reversible solid state photochromic behavior of Keplerate compound 1 when wetted with N,N-dimethylformamide (DMF) and irradiated with sunlight, resulting in a color change from yellow to dark green. It also highlights that the photochromic phenomenon can only be activated in the presence of the DMF solvent.
DALTON TRANSACTIONS
(2021)
Article
Materials Science, Multidisciplinary
Kirill Subbotin, Anatolii Titov, Denis Lis, Yulia Zimina, Yana Didenko, Ghassen Zin Elabedine, Kirill Eremeev, Rosa Maria Sole, Magdalena Aguilo, Pavel Volkov, Pavel Popov, Elena Chernova, Francesc Diaz, Patrice Camy, Pavel Loiko, Xavier Mateos
Summary: Thulium-doped magnesium molybdate single-crystal (Tm3+:MgMoO4) with a Tm3+ doping level of 0.1 at.% was grown using the Czochralski method. The crystal belongs to the monoclinic class and has a thermal expansion tensor and thermal conductivity of 2.64 Wm- 1K-1. The optical spectroscopy of Tm3+ ions reveals broad emission bands and a long excited-state lifetime, making Tm:MgMoO4 a promising material for tunable and mode-locked lasers, pending the solution to the technological challenge of fabricating crystals with higher Tm3+ concentrations.
Article
Biochemistry & Molecular Biology
Krzysztof Lyczko, Monika Lyczko, Marzena Banasiewicz, Karolina Wegrzynska, Anna Ziolko, Anna Baraniak, Jan Cz. Dobrowolski
Summary: The characteristics and antimicrobial activity of a series of thallium(I) compounds were investigated, and it was found that only bismuth(III) complexes showed significant antimicrobial activity.
Article
Chemistry, Physical
Victoria G. Grossman, Maxim S. Molokeev, Bair G. Bazarov, Jibzema G. Bazarova
Summary: New triple molybdates M5CrHf(MoO4)6 (M = K, Tl) and TlCrHf0.5(MoO4)3 were discovered in the ternary molybdate systems M2MoO4-Cr2(MoO4)3-Hf(MoO4)2 (M = K, Tl) in the subsolidus region. The crystal structures were refined and their thermal stability and electrical conductivity were investigated, showing high values for the former and relatively low values for the latter.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Sesegma G. Dorzhieva, Jibzema G. Bazarova, Bair G. Bazarov
Summary: The formation of Rb5Ag1/3Zr5/3(MoO4)(6) compound and its unit cell parameters and phase transition were established. The temperature and frequency dependences of dielectric parameters for Rb5M1/3Zr5/3(MoO4)(6) ceramics were measured, showing anomalies in conductivity at high temperatures.
JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION
(2021)
Article
Chemistry, Inorganic & Nuclear
A. K. Subanakov, E. V. Kovtunets, B. G. Bazarov, A. M. Pugachev, D. O. Sofich, J. G. Bazarova
Summary: In this study, the double borate Rb3Tm2B3O9 was successfully synthesized by solid-state reaction, and its crystal structure and thermal behavior were extensively investigated. The compound exhibited a large band gap energy and a lower nonlinear optical response compared to KDP, with the presence of BO3 groups confirmed through IR analysis.
SOLID STATE SCIENCES
(2021)
Article
Chemistry, Physical
Tatiana Vereshchagina, Ekaterina Kutikhina, Leonid Solovyov, Sergei Vereshchagin, Elena Mazurova, Alexander Anshits
Summary: The paper focuses on synthesizing Sr2+-bearing aluminosilicate/silicate phases as analogs of a mineral-like Sr-90 waste form using hollow glass-crystalline aluminosilicate microspheres from coal fly ash, in order to efficiently stabilize/solidify radioactive components of wastewater.
Article
Chemistry, Multidisciplinary
Natalia N. Anshits, Elena Fomenko, Alexander G. Anshits
Summary: The composition-structure relationship of blocklike ferrospheres isolated from fly ash produced during the combustion of different types of coal was systematically studied. It was found that monoblock globules consist of large sintered crystallites of Mg, Mn ferrospinel, formed from excluded siderite particles containing isomorphic impurities of magnesium and manganese carbonates. SEM analysis showed that as the FeO concentration in individual globules decreases, the crystallite size of ferrospinel decreases, while the content of the glass phase increases.
Article
Chemistry, Multidisciplinary
Jibzema G. Bazarova, Alexandra Logvinova, Bair G. Bazarov
Summary: A fundamental issue in materials science is establishing the relationship between the chemical composition, structure, and properties of materials, which can be addressed through the study of complex oxide compounds and directed synthesis of promising compounds. This study investigated the ternary salt system Rb2MoO4-Bi-2(MoO4)(3)-Zr(MoO4)(2) for the first time, forming novel ternary molybdates through ceramic technology.
IZVESTIYA VUZOV-PRIKLADNAYA KHIMIYA I BIOTEKHNOLOGIYA
(2021)
Article
Chemistry, Inorganic & Nuclear
Victoria G. Grossman, Maxim S. Molokeev, Jibzema G. Bazarova, Bair G. Bazarov, Nikolay Sorokin
Summary: Thallium scandium hafnium molybdate and thallium scandium zirconium molybdate crystallize in trigonal symmetry with the space group R (3) over barc. The crystal structures were obtained by Rietveld method, and the ionic conductivities were measured at different temperatures. The results showed that the molybdates have different ionic conductivities at 773K, with activation energies of 0.8 eV and 0.3 eV respectively.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Bair G. Bazarov, Ekaterina Kaneva, Alexandra Logvinova, Evgeniy Kovtunets, Jibzema G. Bazarova
Summary: A new ternary molybdate Rb5FeZr(MoO4)(6) with a specific crystal structure was synthesized and found to exhibit increased conductivity with temperature, reaching a value of sigma = 0.5.10(-2) S/cm at 873 K. Additionally, a first-order phase transition was observed at 751 K.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Energy & Fuels
Elena Fomenko, Natalia Anshits, Galina Akimochkina, Leonid Solovyov, Sergey Kukhteskiy, Alexander Anshits
Summary: This article presents a systematic study on the composition and origin of PM1-2 microspheres in high-calcium fly ash. The compositions of the microspheres were analyzed and categorized into different groups based on their major components. The study also provides insights into the formation pathways of PM1-2 microspheres.
Article
Chemistry, Physical
Tatiana Vereshchagina, Ekaterina Kutikhina, Sergei Vereshchagin, Olga Buyko, Alexander Anshits
Summary: In this study, coal fly ash hollow aluminosilicate microspheres were used to fabricate lutetium-176 encapsulated aluminosilicate microspheres for selective irradiation of tumors. Lu3+ ions were successfully incorporated into the microspheres through chemical modification and thermal treatment, and the zeolitized products showed different sorption abilities for Lu3+.
Article
Chemistry, Multidisciplinary
B. Purevsuren, A. Ankhtuya, J. G. Bazarova, B. G. Bazarov, S. Zherebtsov, K. S. Votolin
Summary: The study found that coals from Shivee-Ovoo and Ulaan-Ovoo deposits are suitable raw materials for obtaining humic acids. Humic acids extracted from Shivee-Ovoo coal have much higher yield and water solubility compared to those from Ulaan-Ovoo coal, attributed to the former's highly oxidized nature. Additionally, the organic compounds in humic acids from both coals consist mainly of aliphatic and aromatic compounds, with carboxylic (-COOH), carbonyl (>CO), hydroxyl (-OH) and etheric (-O-) groups, characteristic of highly oxidized organic matter.
CHEMISTRY FOR SUSTAINABLE DEVELOPMENT
(2021)
Article
Chemistry, Multidisciplinary
O. D. Chimitova, B. G. Bazarov, J. G. Bazarova, V. V. Atuchin, R. Azmi, A. E. Sarapulova, D. Mikhailova, G. Balachandran, A. Fiedler, U. Geckle, Yu. Prots, A. C. Komarek, T. A. Gavrilova, I. P. Prosvirin, Yi Yang, Zheshuai Lin, M. Knapp, H. Ehrenberg
Summary: Single crystals of the new compound RbFe5(MoO4)(7) were grown successfully by the flux method, and their crystal structure was determined using X-ray single-crystal diffraction technique. The compound crystallizes in a monoclinic space group, showing thermal stability and thermal decomposition behavior. Furthermore, characterization techniques like Raman spectroscopy, magnetic measurements, and electronic structure evaluation using XPS and DFT calculations were employed to study the compound.
Article
Materials Science, Multidisciplinary
S. G. Dorzhieva, D. O. Sofich, B. G. Bazarov, R. Yu Shendrik, J. G. Bazarova
Summary: New molybdates Cs(2)LnZrTi(MoO4) 6.5 with pairs of rare-earth elements have been synthesized, showing varying luminescence properties and emission wavelengths. Different rare-earth element pairs exhibit differences in luminescence intensity and spectral regions, with energy transfer observed in some cases.
INORGANIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
T. A. Vereshchagina, E. A. Kutikhina, E. Fomenko, A. G. Anshits
Summary: The study prepared microsphere composites by coating synthesized crystalline zirconium molybdate and pre-synthesized microporous sodium zirconium silicates on microsphere glass-crystalline supports for Cs+ and Sr2+ removal from wastewater. The composites demonstrated high sorption efficiency for Cs+ and Sr2+, making them effective for decontamination purposes.
CHEMISTRY FOR SUSTAINABLE DEVELOPMENT
(2021)
Article
Chemistry, Multidisciplinary
T. A. Vereshchagina, E. A. Kutikhina, E. Mazurova, E. Fomenko, A. G. Anshits
Summary: Hydrothermal synthesis using coal fly ash cenospheres was studied as a low-temperature method to incorporate water-soluble forms of Cs-137 and Sr-90 in mineral-like aluminosilicates. The Cs-bearing analcime-pollucite solid solutions were crystallized at 120-150 degrees C with 98% Cs+ removal efficiency, while Sr-bearing tobermorite and plagioclase phases were formed in the Sr-containing system with extraction efficiency of Sr2+ not less than 99.99%.
CHEMISTRY FOR SUSTAINABLE DEVELOPMENT
(2021)
