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1.
I. A. Kirilenko 《Russian Journal of Inorganic Chemistry》2008,53(8):1315-1319
On the basis of experimental data obtained in the study of glass-formation boundaries in the Al2(SO4)3-HIO3-H2O, Al(IO3)3-Al2(SO4)3-H2O, and Al(IO3)3-HIO3-H2O systems and using geometrical analysis, we predict the positions of glass-formation boundaries in the Al(IO3)3-Al2(SO4)3-HIO3-H2O four-component system along 60, 40, and 25 wt % H2O sections. 相似文献
2.
Glass formation in the systems Al2(SO4)3-MSO4-H2O (M = Cd2+, Zn2+, Mg2+) and Al2(SO4)3-Fe2(SO4)3-H2O
I. A. Kirilenko 《Russian Journal of Inorganic Chemistry》2012,57(10):1374-1378
The glass formation region boundaries were found in the systems Al2(SO4)3-MSO4-H2O, where M = Cd2+, Zn2+, and Mg2+, and Al2(SO4)3-Fe2(SO4)3-H2O. The causes of the differences in glass-forming ability between the studied systems were analyzed. The structures and properties of glassy Al2(SO4)3 · 11H2O and Fe2(SO4)3 · 11H2O were compared. 相似文献
3.
I. A. Kirilenko 《Russian Journal of Inorganic Chemistry》2006,51(4):533-536
Glass-formation boundaries in the Al(IO3)3-Al2(SO4)3-H2O system are determined. The IR spectra of glassy and crystalline Al(IO3)3 · 8H2O samples are measured. The structure and properties of glassy Al(IO3)3 · 10H2O are compared to those of glassy Al2(SO4)3 · 10H2O. 相似文献
4.
I. A. Kirilenko 《Russian Journal of Inorganic Chemistry》2010,55(4):602-606
Glass formation boundaries in the Al2(SO4)3-Al(NO3)3-H2O system were determined. IR spectra were studied. Schemes of structural rearrangements within the boundaries of a second
glass formation region in the Al(NO3)3-H2O binary subsystem are suggested. A structure is suggested for glassy Al(NO3)3H2O. 相似文献
5.
Phase diagrams of the systems K2SO4Sc2(SO4)3, Rb2SO 4Sc2(SO4)3 and Cs2SO4 Sc2(SO4)3 have been investigated by X-ray diffraction phase analysis and differential thermal analysis techniques. A salient feature of all the systems is the formation of M3Sc(SO4)3, which melt incongruently, and MSc(SO4)2, which on heating decompose in the solid state. 相似文献
6.
The FeCl2-Na2SO3-H2O system was studied along seven sections with the molar ratios Na2SO3: FeCl2 = 5: 1, 5: 2, 5: 3, 5: 4, 5: 5, 5: 10, and 5: 15, including six points on each section where pH ranges from 1.5 to 4.0 in
0.5 steps. Equal-undersedimentation lines for cations and anions were plotted. The iron(II) system forms sodium ferrisulfites
NaFe5O0.5(SO3)5 · 5H2O, NaHFe5(SO3)6 · 5H2O, Na2Fe5(SO3)6 · 4H2O, and NaHFe2(SO3)3; the iron(III) system forms Na2Fe6(SO3)7 · 10H2O. The regions where these compounds sediment were demarcated, and their characterizations were carried out. 相似文献
7.
8.
Rare-earth ammonium sulfate octahydrates of R2(SO4)3·(NH4)2SO4·8H2O (R=Pr, Nd, Sm, and Eu) were synthesized by a wet process, and the stable temperature region for the anhydrous R2(SO4)3·(NH4)2SO4 form was clarified by thermogravimetry/differential thermal analysis, infrared, Raman, and electrical conductivity measurements. Detailed characterization of these double salts demonstrated that the thermal stability of anhydrous R2(SO4)3·(NH4)2SO4 is different between the Pr, Nd salts and the Sm, Eu salts, and the thermal decomposition behavior of these salts was quite different from the previous reports. 相似文献
9.
The phase diagram of the system La2(SO4)3Ag2SO4 was studied by DTA, XRD, SEM, and optical methods. One double salt is formed at 67 mole% La2(SO4)3 and this melts incongruently at 876±6°C. A eutectic is formed at 8 mole% La2(SO4)3 and at a temperature of 618±3°C. Suppression of decomposition was effected by the sealed tube method, but some reference is made to experiments conducted with a flowing atmosphere of SO3, SO2 and O2. 相似文献
10.
Dhanpat Rai Yuanxian Xia Linfeng Rao Nancy J. Hess Andrew R. Felmy Dean A. Moore David E. McCready 《Journal of solution chemistry》2005,34(4):469-498
The objectives of this study were to address uncertainties in the solubility product of (UO2)3(PO4)2⋅4H2O(c) and in the phosphate complexes of U(VI), and more importantly to develop needed thermodynamic data for the Pu(VI)-phosphate system in order to ascertain the extent to which U(VI) and Pu(VI) behave in an analogous fashion. Thus studies were conducted on (UO2)3(PO4)2⋅4H2O(c) and (PuO2)3(PO4)2⋅4H2O(am) solubilities for long-equilibration periods (up to 870 days) in a wide range of pH values (2.5 to 10.5) at fixed phosphate concentrations of 0.001 and 0.01 M, and in a range of phosphate concentrations (0.0001–1.0 M) at fixed pH values of about 3.5. A combination of techniques (XRD, DTA/TG, XAS, and thermodynamic analyses) was used to characterize the reaction products. The U(VI)-phosphate data for the most part agree closely with thermodynamic data presented in Guillaumont et al.,(1) although we cannot verify the existence of several U(VI) hydrolyses and phosphate species and we find the reported value for formation constant of UO2PO−4 is in error by more than two orders of magnitude. A comprehensive thermodynamic model for (PuO2)3(PO4)2⋅4H2O(am) solubility in the H+-Na+-OH−-Cl−-H2PO−4-HPO2−4-PO3−4-H2O system, previously unavailable, is presented and the data shows that the U(VI)-phosphate system is an excellent analog for the Pu(VI)-phosphate system. 相似文献
11.
Jie ZhangDarryl D DesMarteau Sharique ZuberiJing-Ji Ma Lixin XueSamuel M Gillette Hanne BlauRolf Gerhardt 《Journal of fluorine chemistry》2002,116(1):45-48
Synthesis of difunctional N,N′-difluoro perfluoroalkylsulfonamides, CF3SO2NFSO2(CF2)nSO2NFSO2CF3, where n=4, 6 is reported. A related compound with an oxygen linkage CF3SO2NFSO2(CF2)2O(CF2)2SO2NFSO2CF3 has also been prepared. These reagents showed good activity for electrophilic fluorination. 相似文献
12.
EPR studies of Gd3+ doped in single crystals of Nd2(SO4)3·(NH4)2SO4·8H2O (hereafter referred to as NASO) at room (RT) and liquid nitrogen (LNT) temperatures exhibit that (1) the metal aquo complex has a tetragonal symmetry with abnormally low magnitudes of crystalline field parameters at RT and (2) NASO undergoes a possible phase transition between RT and LNT. 相似文献
13.
Karolina Kazmierczak 《Journal of solid state chemistry》2011,184(5):1221-1226
The lanthanide sulphate octahydrates Ln2(SO4)3·8H2O (Ln=Ho, Tm) and the respective tetrahydrate Pr2(SO4)3·4H2O were obtained by evaporation of aqueous reaction mixtures of trivalent rare earth oxides and sulphuric acid at 300 K. Ln2(SO4)3·8H2O (Ln=Ho, Tm) crystallise in space group C2/c (Z=4, aHo=13.4421(4) Å, bHo=6.6745(2) Å, cHo=18.1642(5) Å, βHo=102.006(1) Å3 and aTm=13.4118(14) Å, bTm=6.6402(6) Å, cTm=18.1040(16) Å, βTm=101.980(8) Å3), Pr2(SO4)3·4H2O adopts space group P21/n (a=13.051(3) Å, b=7.2047(14) Å, c=13.316(3) Å, β=92.55(3) Å3). The vibrational and optical spectra of Ho2(SO4)3·8H2O and Pr2(SO4)3·4H2O are also reported. 相似文献
14.
The thermal decomposition of tribochemically activated Al2(SO4)3·xH2O was studied by TG, DTA and EMF methods. For some of the intermediate solids, X-ray diffraction and IR-spectroscopy were applied to learn more about the reaction mechanism. Thermal and EMF studies confirmed that, even after mechanical activation of Al2(SO4)3·xH2O, Al2O(SO4)2 is formed as an intermediate. Isothermal kinetic experiments demonstrated that the thermochemical sulphurization of inactivated Al2(SO4)3·xH2O has an activation energy of 102.2 kJ·mol?1 in the temperature range 850–890 K. The activation energy for activated Al2(SO4)3·xH2O in the range 850–890 K is 55.0 kJ·mol?1. The time of thermal decomposition is almost halved when Al2(SO4)3·xH2O is activated mechanically. The results permit conclusions concerning the efficiency of the tribochemical activation of Al2(SO4)3·xH2O and the chemical and kinetic mechanisms of the desulphurization process. 相似文献
15.
Annamma John Daizy Philip Keith R. Morgan S. Devanarayanan 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2000,56(14):386
The FT IR and FT Raman spectra of Co(en)3Al3P4O16 · 3H2O (compound I) and [NH4]3[Co(NH3)6]3[Al2(PO4)4]2 · 2H2O (compound II) are recorded and analysed based on the vibrations of Co(en)33+, Co(NH3)63+, NH4+, Al---O---P, PO3, PO2 and H2O. The observed splitting of bands indicate that the site symmetry and correlation field effects are appreciable in both the compounds. In compound I, the overtone of CH2 deformation Fermi resonates with its symmetric stretching vibration. The NH4 ion in compound II is not free to rotate in the crystalline lattice. Hydrogen bonding of different groups is also discussed. 相似文献
16.
V. V. Gurzhiy P. A. Mikhailenko S. V. Krivovichev I. G. Tananaev B. F. Myasoedov 《Russian Journal of General Chemistry》2012,82(1):23-26
Crystals of a new uranyl selenate complex [CH3(CH2)3NH3](H5O2)[(UO2)2(SeO4)3(H2O)] were obtained by isothermal evaporation at room temperature of its aqueous solution. The crystal structure was determined
by the X-ray diffraction analysis. The observed character of the arrangement of organic molecules in the interlayer space
confirms the concept of hydrophilic and hydrophobic zones. 相似文献
17.
18.
分别以LiMn_2O_4,NaTi_2(PO_4)_3为正负极,1 mol·L~(-1) Li_2SO_4和0.5 mol·L~(-1) Na_2SO_4的混合水溶液为电解液组装成一种水系混合离子全电池。分别将正负极材料在3种不同水相电解液(1 mol·L~(-1) Li_2SO_4、0.5 mol·L~(-1)Na_2SO_4以及1 mol·L~(-1) Li_2SO_4+0.5 mol·L~(-1)Na_2SO_4混合电解液)中进行循环伏安和恒流充放电测试,结果发现,LiMn_2O_4在上述电解液中仅有Li~+的脱出/嵌入而Na~+由于半径较大而不参与该过程,NaTi_2(PO_4)_3在3种电解液中Li+、Na+均参与嵌入/脱嵌过程,且Li~+和Na~+的嵌入/脱出峰电位相差不大,分别为-0.82和-0.64 V,-0.95和-0.75 V;全电池在265 mA·g~(-1)电流密度下平均放电电压为1.55 V,充放电比容量分别为100.1和74.9 m Ah·g~(-1)。 相似文献
19.
We have found for the first time a ferroelastic transition in many molybdates and tungstates with the Sc2(MoO4)3-type structure. Below the transition these phases are monoclinic (), and above the transition they are orthorhombic (Pnca). Observed transition temperatures are: Al2(MoO4)3, 200°C; Al2(WO4)3, ?6°C; Cr2(MoO4)3, 385°C; Fe2(MoO4)3, 499°C; In2(MoO4)3, 335°C; In2(WO4)3, 252°C; and Sc2(MoO4)3, 9°C. 相似文献
20.
The synthesis of the title compounds by a variety of routes is described. These routes involve the oxidation of antimony(III)fluoride by bis(fluorosulfuryl)peroxide and the use of non-statistical ligand redistribution reactions. Complex formation with ClO2SO3F leads to ClO2[SbFn(SO3F)6-n], with n=3 or 4. Polarized Raman data and low temperature infrared data are reported. All antimony(V)fluoride-fluorosulfates are found to have fluorosulfate bridges with SbF3(SO3F)2 and SbF4(SO3F) being polymers. Ionic formulations for the ClO+2 complexes are again based on vibrational spectra. 相似文献