Results 11 to 20 of about 75,990 (168)
Application of laser Raman spectroscopic parameters of coal maceral analysis with different maturity
Shiyou shiyan dizhi, 2022 Laser Raman spectroscopy has shown a good application prospect for maceral analysis. Raman spectroscopic analysis of different macerals (e.g., vitrinite, semifusinite and macrinite) in coal samples with different maturity (%Ro=0.49%-1.88%) was carried ...
Zhiwei GAO +6 more
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Raman Spectrum of Graphene and Graphene Layers [PDF]
Physical Review Letters, 2006 Graphene is the two-dimensional building block for carbon allotropes of every other dimensionality. We show that its electronic structure is captured in its Raman spectrum that clearly evolves with the number of layers. The D peak second order changes in shape, width, and position for an increasing number of layers, reflecting the change in the ...
Ferrari A. C. +10 more
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East European Journal of Physics, 2023 Silicon doped with gadolinium and silver impurities were studied using a Renishaw InVia Raman spectrometer. Registration and identification of both crystalline and amorphous phase components in the samples was carried out.
Sharifa B. Utamuradova +3 more
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GAJARDOITE-(NH4), (NH4)As3+ 4O6Cl2[(Ca0.5□0.5)(H2O)5], A NEW MINERAL FROM THE KHOVU-AKSY DEPOSIT, EASTERN SIBERIA, RUSSIA [PDF]
МинералогияThe new mineral gajardoite-(NH4), ideally (NH4)As3+4O6Cl2[(Ca0.5□0.5)(H2O)5], is found at the Khovu-Aksy Ni-Co deposit, Republic of Tyva, Russia. Gajardoite-(NH4) occurs as tiny lamellar coarsely hexagonal or irregular curved and divergent crystals up to
A.V. Kasatkin +5 more
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Raman Spectrum of Diamond [PDF]
Nature, 1930 In the course of an examination of the infra-red and ultra-violet regions of the spectrum of a large number of diamonds, we have come across one which, unlike the others, is transparent both at about 8μ, and also in the ultra-violet so far out as λ2300.
R. ROBERTSON, J. J. Fox
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Medžiagotyra, 2023 Cement-based cementitious materials present an alkaline environment and mainly exist in the form of Ca(OH)2. Phosphogypsum, as a retarder of cementitious materials, is often added to cement instead of gypsum, and the fluorine by-product of phosphogypsum ...
Jianhui FAN, Xuebing WANG, Shengbo GUO
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The Raman Spectrum of Deuterium [PDF]
The Journal of Chemical Physics, 1935 A number of observers have studied the emission spectra of mixtures of hydrogen and deuterium. The Fulcher bands of HD and D2 have been photographed [1]. In the extreme untrlaviolet Jeppesen [2], and Beutler and Mie [3], have obtained emission spectra from hydrogen-deuterium mixtures and have ascribed several bands to HD.
Anderson, Thomas F., Yost, Don M.
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Journal of Applied Science and Engineering, 2022 The research on the microcrystal structure of coal mine gas (CMG) hydrate is especially significant for the technology of gas hydrate separation. Raman spectroscopy is an effective method for on-line analysis of gas hydrate microstructure.
Baoyong Zhang +4 more
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On the Raman spectrum of argon dimersa)
The Journal of Chemical Physics, 1979 The pressure broadening of the rotational Raman transitions of argon dimers is calculated, using the semiclassical method. Simple models to compute the line broadening of noble gas dimers are put forward. The predictions of these simple models are compared with the results of the full semiclassical calculation.
Frenkel, D., McTague, J.P.
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Influence of Raman Spectroscopy Test Conditions on the Results of Carbon Chemical Structure of Chars
Energies, 2022 To address the problem of variability in in situ Raman spectroscopy for determining the chemical structure of chars, the rationality of Raman’s original peak spectrum fitting method, the influence of objective lens magnification, particle size, and ...
Jiangyong He +6 more
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