Effect of polytypism on the long and short range crystal structure of InAs nanostructures: An EXAFS and Raman spectroscopy study

2017 ◽  
Vol 35 (4) ◽  
pp. 041803
Author(s):  
Suparna Pal ◽  
Parasmani Rajput ◽  
Shreyashkar Dev Singh ◽  
Vasant G. Sathe ◽  
Shambhu Nath Jha
Keyword(s):  
Crystal Structure ◽  
Raman Spectroscopy ◽  
Short Range ◽  
Spectroscopy Study

Raman Spectroscopy Study on Na2/3Mn1-xFexO2 Oxides

2010 ◽  
Vol 74 ◽  
pp. 60-65 ◽  
Author(s):  
Marushka Sendova-Vassileva ◽  
Radostina Stoyanova ◽  
Dany Carlier ◽  
Meglena Yoncheva ◽  
Ekaterina Zhecheva ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Raman Spectroscopy ◽  
Strong Dependence ◽  
Hexagonal Structure ◽  
Spectroscopy Study ◽  
Quenching Temperature ◽  
Space Group ◽  
History Of ◽  
Hexagonal Modification ◽  
Metal Layers

The structural properties of sodium manganates and iron substituted sodium manganates with compositions Na2/3Mn1-xFexO2 (x=0, 1/3 and 2/3) were studied by Raman spectroscopy. The Raman spectroscopy allows distinguishing between layered phases with orthorhombic (Cmcm space group) and hexagonal (P63/mmc space group) distortion. It has been found that the crystal structure and the composition of Na2/3MnO2 display a strong dependence on the history of the thermal treatment. The orthorhombic distorted modification is stabilized at high temperatures (1000 oC). At lower quenching temperature, there is a phase separation into an orthorhombic and a hexagonal modification, concomitant with an increase in the oxidation state of Mn. When Fe substitutes for Mn, the hexagonal modification is stabilized. In order to understand the origin of the Raman spectra of Na2/3Mn1-xFexO2, we have used Na2/3Co2/3Mn1/3O2 as a standard for hexagonal structure, where Co3+ and Mn4+ are statistically distributed in the transition metal layers.

Molecular structure of diethylaminoalane in the solid state: an X-ray powder diffraction, DFT calculation and Raman spectroscopy study

2016 ◽  
Vol 72 (2) ◽  
pp. 232-240 ◽  
Author(s):  
Thomas Bernert ◽  
Morten B. Ley ◽  
Javier Ruiz-Fuertes ◽  
Michael Fischer ◽  
Michael Felderhoff ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Raman Spectroscopy ◽  
Dft Calculations ◽  
Powder Diffraction ◽  
Dft Calculation ◽  
Membered Ring ◽  
Monoclinic Space Group ◽  
Spectroscopy Study ◽  
X Ray

The crystal structure of diethylaminoalane, [H2Al—N(C2H5)2]2, was determined by X-ray powder diffraction in conjunction with DFT calculations. Diethylaminoalane crystallizes in the monoclinic space groupP21/cwitha= 7.4020 (2),b= 12.9663 (3),c= 7.2878 (2) Å and β = 90.660 (2)° at 293 K. The crystal structure was confirmed by DFT calculations and Raman spectroscopy. The molecular structure of diethylaminoalane consists of dimers of [H2Al—N(CH2CH3)2] in which an Al2N2four-membered ring is formed by a center of inversion. Such an arrangement of the aminoalane moieties in the crystal structure is well known for this class of compound, as shown by the comparison with ethylmethylaminoalane and diisopropylaminoalane.

The Crystal Structure of Na6[(UO2)(SO4)4](H2O)4: X-Ray and Raman Spectroscopy Study

2015 ◽  
Vol 54 (1) ◽  
pp. 5-20 ◽  
Author(s):  
Jakub Plášil ◽  
Nicolas Meisser ◽  
Jiří Čejka
Keyword(s):  
Crystal Structure ◽  
Raman Spectroscopy ◽  
Spectroscopy Study ◽  
X Ray

scholarly journals Raman spectroscopy study of the behavior of the soft mode in a structural phase transition in the Pr3Sb5O12 crystal

2015 ◽  
Vol 57 (11) ◽  
pp. 2286-2289 ◽  
Author(s):  
A. S. Oreshonkov ◽  
A. K. Khodzhibaev ◽  
A. S. Krylov ◽  
M. F. Umarov ◽  
A. N. Vtyurin
Keyword(s):  
Phase Transition ◽  
Raman Spectroscopy ◽  
Structural Phase Transition ◽  
Soft Mode ◽  
Structural Phase ◽  
Spectroscopy Study

scholarly journals Impact of Magnesium on the Structure of Aluminoborosilicate Glasses: A Solid‐State NMR and Raman Spectroscopy Study

2021 ◽  
Author(s):  
Nicolas Bisbrouck ◽  
Marco Bertani ◽  
Frédéric Angeli ◽  
Thibault Charpentier ◽  
Dominique de Ligny ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Solid State ◽  
Solid State Nmr ◽  
Spectroscopy Study

Raman spectroscopy study of acetonitrile at low temperature

2021 ◽  
Vol 246 ◽  
pp. 119065
Author(s):  
Shuo Zhang ◽  
Hongsheng Jia ◽  
Mingxing Song ◽  
He Shen ◽  
Li Dongfei ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Low Temperature ◽  
Spectroscopy Study

Raman spectroscopy study of Ga-doped ZnO ceramics: An estimative of the structural disorder degree

2021 ◽  
Vol 606 ◽  
pp. 412726
Author(s):  
Gabriela Gomes Miranda ◽  
Raphael Lucas de Sousa e Silva ◽  
Hermínia Veridiana dos Santos Pessoni ◽  
A. Franco
Keyword(s):  
Raman Spectroscopy ◽  
Structural Disorder ◽  
Spectroscopy Study ◽  
Disorder Degree ◽  
Doped Zno ◽  
Zno Ceramics
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