scholarly journals Pressure induced phase transformation of Ba8Ga16Ge30 clathrate studied by x-ray diffraction and Raman spectroscopy

2010 ◽  
Vol 107 (1) ◽  
pp. 013517 ◽  
Author(s):  
Tetsuji Kume ◽  
Satoshi Ohno ◽  
Shigeo Sasaki ◽  
Hiroyasu Shimizu ◽  
Yasuo Ohishi ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Phase Transformation ◽  
X Ray Diffraction ◽  
X Ray

Study of Phase Transformation in BaTe2O6 by in Situ High-Pressure X-ray Diffraction, Raman Spectroscopy, and First-Principles Calculations

2015 ◽  
Vol 55 (1) ◽  
pp. 227-238 ◽  
Author(s):  
K. K. Mishra ◽  
S. Nagabhusan Achary ◽  
Sharat Chandra ◽  
T. R. Ravindran ◽  
K. K. Pandey ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
High Pressure ◽  
Phase Transformation ◽  
First Principles ◽  
First Principles Calculations ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Thermal Annealing and Phase Transformation of Serpentine-Like Garnierite

Minerals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 188
Author(s):  
Arun Kumar ◽  
Michele Cassetta ◽  
Marco Giarola ◽  
Marco Zanatta ◽  
Monique Le Guen ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Raman Spectroscopy ◽  
Phase Transformation ◽  
Differential Thermal Analysis ◽  
Thermal Treatment ◽  
Room Temperature ◽  
X Ray Diffraction ◽  
Thermally Induced ◽  
X Ray ◽  
Micro Raman Spectroscopy

This study is focused on the vibrational and microstructural aspects of the thermally induced transformation of serpentine-like garnierite into quartz, forsterite, and enstatite occurring at about 620 °C. Powder specimens of garnierite were annealed in static air between room temperature and 1000 °C. The kinetic of the transformation was investigated by means of thermogravimetric and differential thermal analysis, and the final product was extensively characterized via micro-Raman spectroscopy and X-ray diffraction. Our study shows that serpentine-like garnierite consists of a mixture of different mineral species. Furthermore, these garnierites and their composition can provide details based on the mineralogy and the crystalline phases resulting from the thermal treatment.

Structural characterization of TiO2 ultrafine particles

1999 ◽  
Vol 14 (2) ◽  
pp. 442-446 ◽  
Author(s):  
Yingchun Zhu ◽  
Tiao Liu ◽  
Chuanxian Ding
Keyword(s):  
Crystal Structure ◽  
Raman Spectroscopy ◽  
Phase Transformation ◽  
Fourier Transform ◽  
Raman Spectra ◽  
Ultrafine Particles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Factors Influencing

Four samples of TiO2 ultrafine particles (UFP) were obtained through different processes. The structure of TiO2 ultrafine particles and the factors influencing the structure were investigated with Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, and x-ray diffraction (XRD). Both Raman spectra and x-ray diffractograms show the similar regularity of the phase transformation among the four samples. The observed bimodal lineshape-structure in the Raman spectra is attributed to the intragrain and grain-boundary components of TiO2 UFP. The crystal structure of TiO2 UFP is found to be distorted by the surface structure such as OH and OCH2CH3 groups coordinated on the surface of TiO2 UFP.

ChemInform Abstract: Study of Phase Transformation in BaTe2O6by in situ High-Pressure X-Ray Diffraction, Raman Spectroscopy, and First-Principles Calculations.

ChemInform ◽  
2016 ◽  
Vol 47 (13) ◽  
pp. no-no
Author(s):  
K. K. Mishra ◽  
S. Nagabhusan Achary ◽  
Sharat Chandra ◽  
T. R. Ravindran ◽  
K. K. Pandey ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
High Pressure ◽  
Phase Transformation ◽  
First Principles ◽  
First Principles Calculations ◽  
X Ray Diffraction ◽  
X Ray

Pressure-induced phase transformation of CsPbI3 by X-ray diffraction and Raman spectroscopy

2017 ◽  
Vol 91 (1) ◽  
pp. 38-47 ◽  
Author(s):  
Guan Yuan ◽  
Shan Qin ◽  
Xiang Wu ◽  
Hongrui Ding ◽  
Anhuai Lu
Keyword(s):  
Raman Spectroscopy ◽  
Phase Transformation ◽  
X Ray Diffraction ◽  
X Ray

Raman spectroscopy and X-ray diffraction study of the phase transformation of ZrO2–Al2O3 and CeO2–Al2O3 nanocomposites

2011 ◽  
Vol 166 (1) ◽  
pp. 10-17 ◽  
Author(s):  
Sara Boullosa-Eiras ◽  
Estelle Vanhaecke ◽  
Tiejun Zhao ◽  
De Chen ◽  
Anders Holmen
Keyword(s):  
Raman Spectroscopy ◽  
Phase Transformation ◽  
Diffraction Study ◽  
X Ray Diffraction ◽  
X Ray
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