Dehydration behavior of a natural hydrated Ca-chabazite studied by in-situ high-temperature single-crystal X-ray diffraction

2021 ◽  
Vol 311 ◽  
pp. 110648
Author(s):  
Akihiko Nakatsuka ◽  
Naomi Kawata ◽  
Keiko Fujiwara
Keyword(s):  
High Temperature ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dehydration Behavior

High-temperature structural study of decagonal Al–Cu–Rh

2014 ◽  
Vol 70 (2) ◽  
pp. 306-314 ◽  
Author(s):  
Pawel Kuczera ◽  
Janusz Wolny ◽  
Walter Steurer
Keyword(s):  
High Temperature ◽  
Single Crystal ◽  
Structural Study ◽  
Structural Disorder ◽  
X Ray Diffraction ◽  
X Ray ◽  
Decagonal Phase ◽  
Comparative Structure ◽  
The Stability

The structure of decagonal Al–Cu–Rh has been studied as a function of temperature byin-situsingle-crystal X-ray diffraction in order to contribute to the discussion on energy or entropy stabilization of quasicrystals. The experiments were performed at 293, 1223, 1153, 1083 and 1013 K. A common subset of 1460 unique reflections was used for the comparative structure refinements at each temperature. A comparison of the high-temperature datasets suggests that the best quasiperiodic ordering should exist between 1083 and 1153 K. However, neither the refined structures nor the phasonic displacement parameter vary significantly with temperature. This indicates that the phasonic contribution to entropy does not seem to play a major role in the stability of this decagonal phase in contrast to other kinds of structural disorder, which suggests that, in this respect, this decagonal phase would be similar to other complex intermetallic high-temperature phases.

In situ high temperature single crystal X-ray diffraction study of a natural omphacite

2000 ◽  
Vol 64 (6) ◽  
pp. 983-993 ◽  
Author(s):  
A. Pavese ◽  
R. Bocchio ◽  
G. Ivaldi
Keyword(s):  
High Temperature ◽  
Single Crystal ◽  
Diffusion Processes ◽  
Ambient Conditions ◽  
X Ray Diffraction ◽  
Structural Behaviour ◽  
X Ray ◽  
Thermal Expansion Coefficients ◽  
Using Data

AbstractIn situ high temperature single crystal X-ray diffraction (XRD) experiments have been performed on a chemically quasi-ideal omphacite sample up to 1000°C. The lattice parameters were studied as a function of temperature, and their thermal expansion coefficients determined. The b and c cell edges show discontinuities as a function of temperature which are interpreted here in terms of intracrystalline cation diffusion processes. Structure refinements have been carried out using data collected at room temperature, at 800°C and at ambient conditions after cooling. The structural behaviour as a function of temperature of chemically quasi-ideal omphacites is compared with those of jadeite and diopside.

scholarly journals A new micro-furnace for 'in situ' high-temperature single-crystal X-ray diffraction measurements

2015 ◽  
Vol 71 (a1) ◽  
pp. s348-s348
Author(s):  
Matteo Alvaro ◽  
Ross J. Angel ◽  
Claudio Marciano ◽  
Sula Milani ◽  
Lorenzo Scandolo ◽  
...  
Keyword(s):  
High Temperature ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
X Ray
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