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1.
S. V. Kurbatova E. E. Finkelshtein E. A. Kolosova A. V. Kartashev S. N. Yashkin 《Journal of Structural Chemistry》2004,45(1):144-150
The potential of the structural analogy method in the topological studies of adamantane derivatives and analogs is demonstrated. The topological and structural characteristics of these compounds are calculated. Chromatographic retention indices were determined experimentally. Correlations between the topological indices and the physicochemical and chromatographic characteristics are investigated. 相似文献
2.
V. Kim A. G. Shostenko V. E. Myshkin N. I. Kartashev 《Reaction Kinetics and Catalysis Letters》1979,11(3):241-245
The kinetics of CCl3 radical addition to 1-hexene in CCl3Br and CCl4 media has been studied. The rate constant of CCl3 addition to the double bond is shown to be independent of the solvent. The ratios between the rate constants of transfer and allyl chain termination for the alkyl and polychloroalkyl radicals have been estimated by competition methods. Activation parameters for the calculated rate constants are given.
CCl3- 1- CCCl3Br CCl4. , . . .相似文献
3.
Sofronova S. N. Eremin E. V. Molokeev M. S. Mikhashenok N. V. Kartashev A. V. 《Physics of the Solid State》2021,63(4):654-659
Physics of the Solid State - The Pb3Mn7O15 crystals doped with titanium ions have been synthesized. The study of the structural properties has shown that titanium ions occupy positions in the... 相似文献
4.
G.?M.?Abramova G.?A.?Petrakovski? M.?Boem A.?M.?Vorotynov A.?V.?Kartashev D.?A.?Velikanov V.?V.?Sokolov A.?Yu.?Pichugin 《Physics of the Solid State》2009,51(2):319-321
Fe0.27Mn0.73S single crystals were studied. A magnetic transition is detected near 197 K, which is accompanied by anomalies of the thermal,
electrical, and resonant properties. 相似文献
5.
L. V. Udod G. A. Petrakovskiĭ A. M. Vorotynov O. A. Bayukov D. A. Velikanov A. V. Kartashev A. F. Bovina Yu. G. Shvedenkov M. Baran R. Szymczak 《Physics of the Solid State》2007,49(3):500-504
This paper reports on the first study of the temperature and field dependences of the magnetization, heat capacity, and electrical properties of synthesized polycrystalline samples of aerugite Co10Ge3O16, as well as on x-ray diffraction analysis of this compound. It is shown that the cobalt ions in this compound occupy three nonequivalent positions. The results of the experimental and theoretical studies suggest that aerugite is a ferrimagnet with two uncompensated magnetic moments of the cobalt atom per formula unit. 相似文献
6.
G. M. Abramova G. A. Petrakovskii A. V. Kartashev N. V. Volkov D. A. Velikanov V. V. Sokolov A. Yu. Pichugin 《Physics of the Solid State》2011,53(1):76-79
This paper reports on the results of investigations of the thermal properties and thermal conductivity of single crystals of homogeneous solid solutions Fe x Mn1 ? x S with a cubic NaCl structure, which have been prepared by the cation substitution for divalent manganese ions in manganese monosulfide. It has been revealed that the heat capacity and thermal conductivity exhibit anomalies in the range of the magnetic transition. The cation substitution is accompanied by an increase in the phase transition temperature. 相似文献
7.
V. S. Bondarev A. V. Kartashev M. V. Gorev I. N. Flerov E. I. Pogorel’tsev M. S. Molokeev S. I. Raevskaya D. V. Suzdalev I. P. Raevskii 《Physics of the Solid State》2013,55(4):821-828
The temperature dependences of the heat capacity C p (T) and thermal expansion coefficient α(T) of NaNbO3 ceramic samples have been investigated in the temperature range from 2 to 800 K. In addition to the anomalies associated with the known phase transitions at temperatures T 6 ≈ 265 K, T 5 ≈ 638 K, T 4 ≈ 760 K, and T 3 ≈ 793 K, anomalies in the behavior of C p (T) and α(T) have been observed near T 5″ ≈ 500 K and T 5′ ≈ 600 K. It has been found that all the observed structural transformations, according to the values of the entropy change, are not related to the ordering of structural elements. It has been shown that, with an increase in the temperature, the unit cell volume during the phase transitions near 265, 515, 604, and 638 K decreases. The specific features of the transition to the phase R3c have been examined. Two possible scenarios of the sequence of phase transformations in the temperature range between T 5 and T 6 have been analyzed. 相似文献
8.
G. A. Petrakovskii T. V. Drokina D. A. Velikanov O. A. Bayukov M. S. Molokeev A. V. Kartashev A. L. Shadrina A. A. Mitsuk 《Physics of the Solid State》2012,54(9):1813-1816
The X-ray diffraction, M?ssbauer, calorimetric, and magnetic characteristics of zirconolite GdFeTi2O7 have been measured to determine the ground magnetic state. A kink dependent on the magnetic prehistory of the sample has been revealed in the temperature dependence of the magnetic moment at T = 3 K. M?ssbauer spectroscopy has confirmed the nonequivalence of the iron ion positions in GdFeTi2O7. The experimental data obtained allow the conclusion on the formation of a spin glass state with the freezing temperature T f = 3 K in the GdFeTi2O7 compound. 相似文献
9.
The formation and transformations of blue silver (
max 700 nm) during -irradiation of a weakly alkaline (pH 9) aqueous solution containing AgClO4, polyacrylic acid (PAA), and isopropanol were studied. We believe that blue silver is a linear silver cluster stabilized on a polymeric molecule. During radiation-chemical reduction the cluster is transformed into new clusters (
max = 365 and 460 nm). When all of the Ag+ ions present in the solution have been reduced, clusters coalesce and a new phase,i.e., colloidal silver particles, forms. The mechanism of the radiation-chemical transformations is discussed.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 35–37, January, 1995. 相似文献
10.