Direct determination of local structure around Fe in anatase TiO2

2007 ◽  
Vol 396 (1-2) ◽  
pp. 177-180 ◽  
Author(s):  
Sanyuan Zhu ◽  
Tongfei Shi ◽  
Wenhan Liu ◽  
Shiqiang Wei ◽  
Yaning Xie ◽  
...  
Keyword(s):  
Local Structure ◽  
Direct Determination ◽  
Anatase Tio2

scholarly journals Revisit to diffraction anomalous fine structure

2014 ◽  
Vol 21 (6) ◽  
pp. 1247-1251 ◽  
Author(s):  
T. Kawaguchi ◽  
K. Fukuda ◽  
K. Tokuda ◽  
K. Shimada ◽  
T. Ichitsubo ◽  
...  
Keyword(s):  
Fine Structure ◽  
Local Structure ◽  
Spectroscopic Analysis ◽  
Direct Determination ◽  
Polycrystalline Sample ◽  
X Ray Diffraction ◽  
X Ray ◽  
Area Detector ◽  
State And Local

The diffraction anomalous fine structure (DAFS) method that is a spectroscopic analysis combined with resonant X-ray diffraction enables the determination of the valence state and local structure of a selected element at a specific crystalline site and/or phase. This method has been improved by using a polycrystalline sample, channel-cut monochromator optics with an undulator synchrotron radiation source, an area detector and direct determination of resonant terms with a logarithmic dispersion relation. This study makes the DAFS method more convenient and saves a large amount of measurement time in comparison with the conventional DAFS method with a single crystal. The improved DAFS method has been applied to some model samples, Ni foil and Fe3O4powder, to demonstrate the validity of the measurement and the analysis of the present DAFS method.

Direct Determination of the Local Structure in Molten Alumina by High Temperature X-Ray Diffraction

1995 ◽  
Vol 50 (8) ◽  
pp. 770-774 ◽  
Author(s):  
Y. Waseda ◽  
K. Sugiyama ◽  
J. M. Toguri
Keyword(s):  
High Temperature ◽  
Diffraction Study ◽  
Local Structure ◽  
Direct Determination ◽  
X Ray Diffraction ◽  
Interference Function ◽  
X Ray ◽  
Local Ordering

Abstract A high temperature X-ray diffraction study of molten alumina has been carried out at 2363 K (2090°C). The local ordering parameters in molten alumina were estimated by using the interference function refining technique. Octahedrally coordinated aluminum is suggested to remain in the melt as the fundamental local structure.

The Direct Determination of I131 in Heterogeneous Fecal Specimens

1961 ◽  
Vol 41 (4) ◽  
pp. 380-384 ◽  
Author(s):  
Arthur F. Dratz ◽  
James C. Coberly
Keyword(s):  
Direct Determination

DETERMINATION OF THE LOCAL STRUCTURE OF METALLIC GLASSES BY EXAFS

1982 ◽  
Vol 43 (C9) ◽  
pp. C9-43-C9-46 ◽  
Author(s):  
A. Sadoc ◽  
A. M. Flank ◽  
D. Raoux ◽  
P. Lagarde
Keyword(s):  
Metallic Glasses ◽  
Local Structure

A New Method for Direct Determination of the Recoilless Fraction with Application to Magnetic Nanoparticles

2002 ◽  
Vol 721 ◽  
Author(s):  
Monica Sorescu
Keyword(s):  
Room Temperature ◽  
Average Particle Size ◽  
Direct Determination ◽  
Average Particle ◽  
Lattice Method ◽  
Recoilless Fraction ◽  
Single Room ◽  
Magnetite Particles ◽  
Physical Mixtures

AbstractWe propose a two-lattice method for direct determination of the recoilless fraction using a single room-temperature transmission Mössbauer measurement. The method is first demonstrated for the case of iron and metallic glass two-foil system and is next generalized for the case of physical mixtures of two powders. We further apply this method to determine the recoilless fraction of hematite and magnetite particles. Finally, we provide direct measurement of the recoilless fraction in nanohematite and nanomagnetite with an average particle size of 19 nm.

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