用XRD,Raman光谱和DSC研究了Al2(MoO4)3,Cr2(MoO4)3和Fe2(MoO4)3的结构与相变.Al2(MoO4)3,Cr2(MoO4)3和Fe2(MoO4)3在室温下为单斜相, 分别在483 K,673 K和783 K附近转变为正交相.发现MO4四面体的对称和反对称伸缩振动模的频率和相对强度明显受到A3+离子的影响.这些模的软化程度受A3+离子的影响依次...
The Raman and infrared spectra of Na2MoO4, K2MoS4, and Cs2MoS4 with 92Mo and 100Mo have been measured. The exact force field has been determined from these... A Müller,N Weinstock,N Mohan,... - 《Applied Spectroscopy》 被引量: 33发表: 1973年 Adsorption/Desorption Kinetics of MoO2-...
The ν 1 vibrational Raman modes of the anions SO , WO and MoO have been studied in aqueous solution with great precision, and the effect of different alkali metal cations (Li + , Na + , K + , Rb + and Cs + ) carefully recorded as a function of concentration. The results show ...
采用红外(ir)、拉曼(raman)、x-射线衍射(xrd)、程序升温还原(tpr)等方法考察了经硫酸根改性后的金红石(sr)与锐钛矿(sa)的混合比例变化时的负载型催化剂,moo3/tio2(sr+sa),的一些物理化学性质(如活性组分moo3的分散行为、表面酸碱性、氧化还原性)的变化规律。结果表明:对于moo3/tio2(sr+sa)样品,低含量moo...
The resonance Raman spectrum of aqueous chromate ion was measured with the 514.5 and 363.8 nm argon laser lines by Kiefer and Bernstein [32]. The Cr-O stretching bands at 848 (ν1-A1), 887 (ν3-T2), 350 (ν2-E), and 369 cm−1 (ν4-T2) were observed with the 514.5 nm line...
The peculiarities in the Li2MoO4 case are interpreted in terms of the Auger resonant Raman scattering of the incident photons and band-like structures of the unoccupied molecular orbitals in the insulating solid. 展开 关键词: structures peculiarities Auger synchrotron Auger lines ...
Raman ... K Terashima,T Uchino,T Hashimoto,... - 《Journal of the Ceramic Society of Japan》 被引量: 68发表: 1997年 Synthesis, optical, structural, and radiation transmission properties of PbO/ Bi_2O_3/B_2O_3/Fe_2O_3 glasses: An experimental and in silico study In this paper, ...
The samples were characterized by elemental analyses, powder X-ray diffraction (XRD), Fourier transform infrared (FT鈥揑R), Raman spectra, photoluminescence spectroscopy. The results indicated that Eu3+ ions were likely incorporated into the hydrotalcite lattice and MoO42 anions were successfully ...
to structural characteristics of the material (X-ray diffraction (XRD), scanning electron microscopy (SEM), IR spectroscopy, N2 adsorption, thermogravimetry) and to molybdate speciation as revealed by in-situ studies in the presence of peroxide (FT Raman, diffuse reflectance UV/visible s...
using perturbation theory, the complete set of force constants has been calculated for the free anions WO,2– and MoO4 2– and for systems MEO4 2–(M = Na2 +, Li2 +, Pb2+,Sr2+, Ca2+; E = W, Mo) on the basis of known frequencies of IR and Raman spectra of the corresponding...