High resolution x‐ray diffraction analysis of annealed low‐temperature gallium arsenide

1992 ◽  
Vol 60 (21) ◽  
pp. 2642-2644 ◽  
Author(s):  
R. J. Matyi ◽  
M. R. Melloch ◽  
J. M. Woodall
Keyword(s):  
Gallium Arsenide ◽  
High Resolution ◽  
Low Temperature ◽  
Diffraction Analysis ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals X-ray diffraction analysis of kaolin M1 and M2 via the Williamson–Hall and Warren–Averbach methods

2021 ◽  
pp. 174751982098472
Author(s):  
Lalmi Khier ◽  
Lakel Abdelghani ◽  
Belahssen Okba ◽  
Djamel Maouche ◽  
Lakel Said
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Low Temperature ◽  
Diffraction Analysis ◽  
Mechanical Resistance ◽  
X Ray Diffraction ◽  
Integral Breadth ◽  
X Ray ◽  
Mullite Phase

Kaolin M1 and M2 studied by X-ray diffraction focus on the mullite phase, which is the main phase present in both products. The Williamson–Hall and Warren–Averbach methods for determining the crystallite size and microstrains of integral breadth β are calculated by the FullProf program. The integral breadth ( β) is a mixture resulting from the microstrains and size effect, so this should be taken into account during the calculation. The Williamson–Hall chart determines whether the sample is affected by grain size or microstrain. It appears very clearly that the principal phase of the various sintered kaolins, mullite, is free from internal microstrains. It is the case of the mixtures fritted at low temperature (1200 °C) during 1 h and also the case of the mixtures of the type chamotte cooks with 1350 °C during very long times (several weeks). This result is very significant as it gives an element of explanation to a very significant quality of mullite: its mechanical resistance during uses at high temperature remains.

Insight into the Electron Density Distribution in an O,N-Heterocyclic Stannylene by High-Resolution X-ray Diffraction Analysis

2019 ◽  
Vol 2019 (6) ◽  
pp. 875-884 ◽  
Author(s):  
Maxim G. Chegerev ◽  
Alexandr V. Piskunov ◽  
Kseniya V. Tsys ◽  
Andrey G. Starikov ◽  
Klaus Jurkschat ◽  
...  
Keyword(s):  
High Resolution ◽  
Density Distribution ◽  
Diffraction Analysis ◽  
Electron Density ◽  
Electron Density Distribution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Insight Into

High-resolution X-ray diffraction analysis of magnetically aligned high-Tc superconducting ceramics

1996 ◽  
Vol 265 (3-4) ◽  
pp. 233-242 ◽  
Author(s):  
J. Chrosch ◽  
C. Panagopoulos ◽  
N. Athanassopoulou ◽  
J.R. Cooper ◽  
E.K.H. Salje
Keyword(s):  
High Resolution ◽  
Diffraction Analysis ◽  
X Ray Diffraction ◽  
High Tc ◽  
X Ray ◽  
Superconducting Ceramics ◽  
Magnetically Aligned

π-Olefin-Iridium-Komplexe, XXII [1]. C-H-Aktivierung von aromatischen und aliphatischen Solvensmolekülen RH bei der Reaktion von [Cp*IrCI2]2 mit Butadienmagnesium unter Bildung von [Cp*Ir(η3-C4H7)R] sowie Kristallstruktur von [Cp*Ir(η3-C4H7)C6H5] / π-Olefin Iridium Complexes, XXII [1]. C-H Activation of Aromatic and Aliphatic Solvent Molecules RH in the Reaction of [Cp*IrCl2]2 with Butadienemagnesium with Formation of [Cp*Ir(η3-C4H7)R], and Crystal Structure of [Cp*Ir(η3-C4H7)C6H5]

1994 ◽  
Vol 49 (12) ◽  
pp. 1645-1653 ◽  
Author(s):  
Jörn Müller ◽  
Petra Escarpa Gaede ◽  
Ke Qiao
Keyword(s):  
Crystal Structure ◽  
Low Temperature ◽  
Diffraction Analysis ◽  
Iridium Complexes ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nmr Spectrometry ◽  
Benzene Toluene ◽  
Solvent Molecules ◽  
Mechanism Of The Reaction

Reactions of [Cp*IrCl2]2 (Cp*=η3-C5Me5) with [MgC4H6·2 THF]n at low temperature give [Cp*Ir(η4-C4H6)] together with [Cp*Ir(η3-C4H7)R] compounds, the latter being formed via C-H activation of solvent molecules RH (RH = benzene, toluene, anisole, thiophene, furane, N-methylpyrrole, pentane, cyclohexane. THF). In the case of pyrrole, C-N -activation occurs. The ratio of syn and anti isomers of the 1-methylallyl complexes as well as the sites of C-H activation of RH were investigated by NMR spectrometry. An enantiomorphous crystal of [Cp*Ir(η3-C4H7)C6Hs] was characterized by X-ray diffraction analysis which reveals trigonal planar coordination at the Ir atom and an exo, syn conformation of the 1-methylallyl ligand. A mechanism of the reaction which involves 16-electron intermediates is discussed. The corresponding system [Cp*RhCl2]2/butadienemagnesium/RH gives only [Cp*Rh(η4-C4H6)], and no C-H activation is observed.

High-resolution X-ray diffraction analysis on HVPE-grown thick GaN layers

2009 ◽  
Vol 311 (10) ◽  
pp. 3080-3084 ◽  
Author(s):  
J.Q. Liu ◽  
J.F. Wang ◽  
Y.F. Liu ◽  
K. Huang ◽  
X.J. Hu ◽  
...  
Keyword(s):  
High Resolution ◽  
Diffraction Analysis ◽  
X Ray Diffraction ◽  
X Ray

High-resolution X-ray diffraction analysis of strain distribution in GaN nanowires on Si(111) substrate

nano Online ◽  
2016 ◽  
Author(s):  
Hryhorii Stanchu ◽  
Vasyl Kladko ◽  
Andrian V Kuchuk ◽  
Nadiia Safriuk ◽  
Alexander Belyaev ◽  
...  
Keyword(s):  
High Resolution ◽  
Diffraction Analysis ◽  
Strain Distribution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Gan Nanowires

High-resolution X-ray diffraction studies of the GaAs structures grown at a low temperature and periodically δ-doped with antimony and phosphorus

2009 ◽  
Vol 43 (8) ◽  
pp. 1078-1085 ◽  
Author(s):  
V. V. Chaldyshev ◽  
M. A. Yagovkina ◽  
M. V. Baidakova ◽  
V. V. Preobrazhenskii ◽  
M. A. Putyato ◽  
...  
Keyword(s):  
High Resolution ◽  
Low Temperature ◽  
X Ray Diffraction ◽  
X Ray

Crystallization kinetics and high-resolution X-ray diffraction analysis on nonlinear optical l-threonine single crystals

2007 ◽  
Vol 61 (27) ◽  
pp. 4932-4936 ◽  
Author(s):  
G. Ramesh Kumar ◽  
S. Gokul Raj ◽  
Thenneti Raghavalu ◽  
V. Mathivanan ◽  
M. Kovendhan ◽  
...  
Keyword(s):  
High Resolution ◽  
Diffraction Analysis ◽  
Single Crystals ◽  
Crystallization Kinetics ◽  
Nonlinear Optical ◽  
X Ray Diffraction ◽  
X Ray
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