scholarly journals A Raman spectroscopic study of the natural carbonophosphates Na<sub>3</sub><i>M</i>CO<sub>3</sub>PO<sub>4</sub> (<i>M</i> is Mn, Fe, and Mg)

2021 ◽  
Vol 33 (3) ◽  
pp. 283-297
Author(s):  
Evgeniy Nikolaevich Kozlov ◽  
Ekaterina Nikolaevna Fomina ◽  
Vladimir Nikolaevich Bocharov ◽  
Mikhail Yurievich Sidorov ◽  
Natalia Sergeevna Vlasenko ◽  
...  
Keyword(s):  
Spectroscopic Study ◽  
General Formula ◽  
Raman Spectra ◽  
Crystallographic Orientation ◽  
Energy Dispersive ◽  
X Ray ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Vibrational Bands

Abstract. Raman spectra of three natural carbonophosphates (sidorenkite, bonshtedtite, and bradleyite) with the general formula Na3MCO3PO4 (M is Mn, Fe, and Mg) were studied and compared. These spectra showed from 21 to 24 vibrational bands, of which the two most intense (964±5 and 1074±3 cm−1) correspond to the υ1(P–O) and υ1(C–O) modes. These two bands split into doublet peaks due to the occurrence of isomorphic impurities. It was found that the crystallographic orientation of the sample influences the intensity of most bands. Most bands assigned to the same vibrations showed a regular shift (the smallest in sidorenkite spectra, an intermediate in bonshtedtite, and the largest in bradleyite). We propose an algorithm that allows for diagnostics of carbonophosphates in inclusions by their Raman spectra, providing a reliable result even in the absence of energy-dispersive X-ray spectroscopy (EDX) data.

scholarly journals Hydrogen Bonds: Raman Spectroscopic Study

2021 ◽  
Vol 22 (10) ◽  
pp. 5380
Author(s):  
Boris A. Kolesov
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Spectroscopic Study ◽  
Raman Spectra ◽  
Temperature Region ◽  
Vibrational Frequency ◽  
Chemical Compounds ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Proton Dynamics

The work outlines general ideas on how the frequency and the intensity of proton vibrations of X–H×××Y hydrogen bonding are formed as the bond evolves from weak to maximally strong bonding. For this purpose, the Raman spectra of different chemical compounds with moderate, strong, and extremely strong hydrogen bonds were obtained in the temperature region of 5 K–300 K. The dependence of the proton vibrational frequency is schematically presented as a function of the rigidity of O-H×××O bonding. The problems of proton dynamics on tautomeric O–H···O bonds are considered. A brief description of the N–H···O and C–H···Y hydrogen bonds is given.

Infrared and Raman Spectroscopic Study of Isocytosine

1974 ◽  
Vol 29 (7-8) ◽  
pp. 343-350 ◽  
Author(s):  
Jean-Maurice Delabar
Keyword(s):  
Infrared Spectroscopy ◽  
Spectroscopic Study ◽  
Raman Spectra ◽  
Lattice Vibration ◽  
Vibration Frequencies ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Frequency Group

Abstract Isocytosine and isocytosine-d3 crystals have been investigated at 300 K, 90 K, and 10 K by infrared spectroscopy; the Raman spectra of crystals and solutions in H2O , D2O have also been studied. Using these data and the frequency group approximation we propose assignments of the fundamental molecular frequencies. Eleven lattice vibration frequencies have been observed in absorption and nine in diffusion.

RAMAN SPECTROSCOPIC STUDY OF THE DIFFERENT CRYSTALLOGRAPHIC FACES OF YBa2Cu3O6+δ SINGLE CRYSTALS IN THE TETRAGONAL AND ORTHORHOMBIC PHASES

1991 ◽  
Vol 05 (19) ◽  
pp. 1275-1279
Author(s):  
S. M. RAO ◽  
B. H. LOO ◽  
R. E. BREWSTER ◽  
J. M. CHANG
Keyword(s):  
Spectroscopic Study ◽  
Single Crystals ◽  
Raman Spectra ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Two Phases

Raman spectra recorded on different crystallographic faces of the YBa 2 Cu 3 O 6+δ crystals in both the tetragonal and orthorhombic phases are presented which show that the spectra differ for the (001) face in the two phases.

In situ structural changes of amorphous diopside (CaMgSi2O6) up to 20 GPa: A Raman and O K-edge X-ray Raman spectroscopic study

2016 ◽  
Vol 178 ◽  
pp. 41-61 ◽  
Author(s):  
Benjamin J.A. Moulton ◽  
Grant S. Henderson ◽  
Hiroshi Fukui ◽  
Nozomu Hiraoka ◽  
Dominique de Ligny ◽  
...  
Keyword(s):  
Spectroscopic Study ◽  
Structural Changes ◽  
X Ray ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study

ChemInform Abstract: X-Ray Diffraction and Raman Spectroscopic Study on the Short-Range Structure of Molten CeCl3

ChemInform ◽  
2010 ◽  
Vol 24 (23) ◽  
pp. no-no
Author(s):  
J. MOCHINAGA ◽  
M. IKEDA ◽  
K. IGARASHI ◽  
K. FUKUSHIMA ◽  
Y. IWADATE
Keyword(s):  
Spectroscopic Study ◽  
Short Range ◽  
X Ray Diffraction ◽  
X Ray ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Short Range Structure

scholarly journals A Raman spectroscopic study of uranyl minerals from Cornwall, UK

RSC Advances ◽  
2014 ◽  
Vol 4 (103) ◽  
pp. 59137-59149 ◽  
Author(s):  
R. J. P. Driscoll ◽  
D. Wolverson ◽  
J. M. Mitchels ◽  
J. M. Skelton ◽  
S. C. Parker ◽  
...  
Keyword(s):  
Spectroscopic Study ◽  
Raman Spectra ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study

Raman spectra have been collected using three excitation wavelengths for thirteen uranyl mineral samples, including novác̆ekite, and analysed.

X-ray diffraction and Raman spectroscopic study of nanocrystalline CuO under pressures

2002 ◽  
Vol 121 (5) ◽  
pp. 275-279 ◽  
Author(s):  
Zhongwu Wang ◽  
V Pischedda ◽  
S.K Saxena ◽  
Peter Lazor
Keyword(s):  
Spectroscopic Study ◽  
X Ray Diffraction ◽  
X Ray ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study

X-ray diffraction and Raman spectroscopic study on the short-range structure of molten CeCl3

1993 ◽  
Vol 193 (1-2) ◽  
pp. 36-37 ◽  
Author(s):  
J. Mochinaga ◽  
M. Ikeda ◽  
K. Igarashi ◽  
K. Fukushima ◽  
Y. Iwadate
Keyword(s):  
Spectroscopic Study ◽  
Short Range ◽  
X Ray Diffraction ◽  
X Ray ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Short Range Structure
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