scholarly journals High-pressure behavior and thermoelastic properties of niobium studied by in situ x-ray diffraction

2014 ◽  
Vol 116 (1) ◽  
pp. 013516 ◽  
Author(s):  
Yongtao Zou ◽  
Xintong Qi ◽  
Xuebing Wang ◽  
Ting Chen ◽  
Xuefei Li ◽  
...  
Keyword(s):  
High Pressure ◽  
X Ray Diffraction ◽  
Thermoelastic Properties ◽  
X Ray ◽  
Pressure Behavior

Structural properties of ammonium iodide under high pressure

RSC Advances ◽  
2015 ◽  
Vol 5 (50) ◽  
pp. 40336-40340 ◽  
Author(s):  
Yanping Huang ◽  
Xiaoli Huang ◽  
Lu Wang ◽  
Gang Wu ◽  
Defang Duan ◽  
...  
Keyword(s):  
High Pressure ◽  
Raman Scattering ◽  
Structural Properties ◽  
Ammonium Iodide ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pressure Behavior

The high-pressure behavior of ammonium iodide (NH4I) has been investigated by in situ synchrotron X-ray diffraction (XRD) and Raman scattering up to 40 GPa.

High-pressure behavior of synthetic mordenite-Na: an in situ single-crystal synchrotron X-ray diffraction study

2015 ◽  
Vol 230 (4) ◽  
Author(s):  
Paolo Lotti ◽  
G. Diego Gatta ◽  
Marco Merlini ◽  
Hanns-Peter Liermann
Keyword(s):  
High Pressure ◽  
Single Crystal ◽  
Diffraction Study ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Pressure Behavior ◽  
Synthetic Mordenite

AbstractThe high-pressure behavior of a synthetic mordenite-Na (space group:

scholarly journals Pressure-induced Jahn-Teller Switch in the Homoleptic Hybrid Perovskite [(CH3)2NH2]Cu(HCOO)3: Orbital Reordering by Unconventional Degrees of Freedom

2021 ◽  
Author(s):  
Rebecca Scatena ◽  
Michał Andrzejewski ◽  
Roger D Johnson ◽  
Piero Macchi
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Coordination Polymer ◽  
Degrees Of Freedom ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hybrid Perovskite ◽  
Jahn Teller

Through in-situ, high-pressure x-ray diffraction experiments we have shown that the homoleptic perovskite-like coordination polymer [(CH3)2NH2]Cu(HCOO)3 undergoes a pressure-induced orbital reordering phase transition above 5.20 GPa. This transition is distinct...

PHASE TRANSITION IN LAYERED PEROVSKITE LIKE MANGANATE Ca3Mn2O7 UNDER HIGH PRESSURE

2001 ◽  
Vol 15 (18) ◽  
pp. 2491-2497 ◽  
Author(s):  
J. L. ZHU ◽  
L. C. CHEN ◽  
R. C. YU ◽  
F. Y. LI ◽  
J. LIU ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Diamond Anvil Cell ◽  
The Other ◽  
Layered Perovskite ◽  
X Ray Diffraction ◽  
Two Phase ◽  
X Ray ◽  
Diamond Anvil

In situ high pressure energy dispersive X-ray diffraction measurements on layered perovskite-like manganate Ca 3 Mn 2 O 7 under pressures up to 35 GPa have been performed by using diamond anvil cell with synchrotron radiation. The results show that the structure of layered perovskite-like manganate Ca 3 Mn 2 O 7 is unstable under pressure due to the easy compression of NaCl-type blocks. The structure of Ca 3 Mn 2 O 7 underwent two phase transitions under pressures in the range of 0~35 GPa. One was at about 1.3 GPa with the crystal structure changing from tetragonal to orthorhombic. The other was at about 9.5 GPa with the crystal structure changing from orthorhombic back to another tetragonal.

The high-pressure anisotropic thermoelastic properties of a potential inner core carbon-bearing phase, Fe7C3, by single-crystal X-ray diffraction

2018 ◽  
Vol 103 (10) ◽  
pp. 1568-1574 ◽  
Author(s):  
Xiaojing Lai ◽  
Feng Zhu ◽  
Jiachao Liu ◽  
Dongzhou Zhang ◽  
Yi Hu ◽  
...  
Keyword(s):  
High Pressure ◽  
Single Crystal ◽  
Inner Core ◽  
X Ray Diffraction ◽  
Thermoelastic Properties ◽  
X Ray

scholarly journals In situ observation of phase changes of a silica-supported cobalt catalyst for the Fischer–Tropsch process by the development of a synchrotron-compatible in situ/operando powder X-ray diffraction cell

2018 ◽  
Vol 25 (6) ◽  
pp. 1673-1682 ◽  
Author(s):  
Adam S. Hoffman ◽  
Joseph A. Singh ◽  
Stacey F. Bent ◽  
Simon R. Bare
Keyword(s):  
High Pressure ◽  
Elevated Pressure ◽  
Phase Changes ◽  
In Situ Observation ◽  
X Ray Diffraction ◽  
Fischer Tropsch ◽  
X Ray ◽  
And Performance ◽  
Co Nanoparticles

In situ characterization of catalysts gives direct insight into the working state of the material. Here, the design and performance characteristics of a universal in situ synchrotron-compatible X-ray diffraction cell capable of operation at high temperature and high pressure, 1373 K, and 35 bar, respectively, are reported. Its performance is demonstrated by characterizing a cobalt-based catalyst used in a prototypical high-pressure catalytic reaction, the Fischer–Tropsch synthesis, using X-ray diffraction. Cobalt nanoparticles supported on silica were studied in situ during Fischer–Tropsch catalysis using syngas, H2 and CO, at 723 K and 20 bar. Post reaction, the Co nanoparticles were carburized at elevated pressure, demonstrating an increased rate of carburization compared with atmospheric studies.

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