X-ray Study with Synchrotron Radiation for Filled Skutterudite CeRu4As12at Ambient Pressure and at High Pressures

2008 ◽  
Vol 77 (Suppl.A) ◽  
pp. 324-326 ◽  
Author(s):  
Keiki Takeda ◽  
Junichi Hayashi ◽  
Nobuyuki Hoshi ◽  
Chihiro Sekine ◽  
Ichimin Shirotani
Keyword(s):  
Synchrotron Radiation ◽  
High Pressures ◽  
Ambient Pressure ◽  
Filled Skutterudite ◽  
X Ray

X-ray study with synchrotron radiation for filled skutterudite YbFe4P12 at ambient and high pressures

2006 ◽  
Vol 382 (1-2) ◽  
pp. 8-13 ◽  
Author(s):  
Ichimin Shirotani ◽  
Junichi Hayashi ◽  
Keiki Takeda ◽  
Ryusuke Nakada ◽  
Yasuo Ohishi
Keyword(s):  
Synchrotron Radiation ◽  
High Pressures ◽  
Filled Skutterudite ◽  
X Ray

scholarly journals X-ray study for new filled skutterudite DyRu4P12at ambient and high pressures

2008 ◽  
Vol 64 (a1) ◽  
pp. C607-C607
Author(s):  
K. Takeda ◽  
H. Ando ◽  
J. Hayashi ◽  
C. Sekine ◽  
I. Shirotani
Keyword(s):  
High Pressures ◽  
Filled Skutterudite ◽  
X Ray

X-Ray Structural Study of Li3N at High Pressure

1997 ◽  
Vol 499 ◽  
Author(s):  
Allen C. Ho ◽  
Maurice K. Granger ◽  
Arthur L. Ruoff
Keyword(s):  
High Pressure ◽  
Free Energy ◽  
Synchrotron Radiation ◽  
Equation Of State ◽  
Ambient Temperature ◽  
Structural Study ◽  
Ambient Pressure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Gibb’S Free Energy

ABSTRACTThe equation of state (EOS) of Li3N has been determined by energy-dispersive x-ray diffraction (EDXD) using synchrotron radiation up to 35 GPa at ambient temperature. Both the hexagonal D6h4(P63/mmc) and the hexagonal D6h1(P6/mmm) phases were present at ambient pressure. The D6h1 -structure completely transforms into the D6h4 -structure at modest pressure. The change in Gibb's free energy as a function of pressure for Li3N was calculated using the experimental EOS.

High-pressure transformations of NbO2F

2000 ◽  
Vol 56 (2) ◽  
pp. 189-196 ◽  
Author(s):  
Stefan Carlson ◽  
Ann-Kristin Larsson ◽  
Franziska E. Rohrer
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
High Pressures ◽  
Ambient Pressure ◽  
Close Packing ◽  
Hexagonal Close Packing ◽  
Rietveld Refinements ◽  
X Ray ◽  
Anion Coordination ◽  
Diamond Anvil

The ReO3-type structure NbO2F, niobium dioxyfluoride, has been studied at high pressures using diamond anvil cells and synchrotron X-ray radiation. High-pressure powder diffraction measurements have been performed up to 40.1 GPa. A phase transition from the cubic (Pm3¯m) ambient pressure structure to a rhombohedral (R3¯c) structure at 0.47 GPa has been observed. Rietveld refinements at 1.38, 1.96, 3.20, 6.23, 9.00 and 10.5 GPa showed that the transition involves an a − a − a − tilting of the cation–anion coordination octahedra and a change of the anion–anion arrangement to approach hexagonal close packing. Compression and distortion of the Nb(O/F)6 octahedra is also revealed by the Rietveld refinements. At 17–18 GPa, the diffraction pattern disappears and the structure becomes X-ray amorphous.

scholarly journals The solvothermal synthesis of γ-AlOOH nanoflakes and their compression behaviors under high pressures

RSC Advances ◽  
2017 ◽  
Vol 7 (9) ◽  
pp. 4904-4911 ◽  
Author(s):  
Xudong Zhou ◽  
Jian Zhang ◽  
Yanmei Ma ◽  
Hui Tian ◽  
Yue Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
Synchrotron Radiation ◽  
Solvothermal Synthesis ◽  
High Pressures ◽  
X Ray Diffraction ◽  
X Ray ◽  
Radiation Angle

The compression behaviors of γ-AlOOH nanoflakes were investigated via in situ high pressure synchrotron radiation angle dispersive X-ray diffraction techniques.

X-ray diffraction investigations of CaF2 at high pressure

1992 ◽  
Vol 25 (5) ◽  
pp. 578-581 ◽  
Author(s):  
L. Gerward ◽  
J. S. Olsen ◽  
S. Steenstrup ◽  
M. Malinowski ◽  
S. Åsbrink ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Synchrotron Radiation ◽  
High Pressures ◽  
Low Pressure ◽  
Single Crystal Sample ◽  
X Ray Diffraction ◽  
Crystal Sample ◽  
X Ray ◽  
Pressure Phase

Synchrotron-radiation X-ray diffraction studies of CaF2 at high pressures have been performed on a powder sample up to 45 GPa and on a single-crystal sample up to 9.4 GPa. The bulk modulus of the low-pressure phase was determined to be B 0 = 87 (5) GPa. A phase transition was observed at about 9.5 GPa. The transition is accompanied by a volume contraction of 11%. The high-pressure phase is orthorhombic PbCl2 type (space group Pbnm). The sample only partially reverts to the low-pressure phase upon release of pressure.

Hydrogen, H2(g), by near-ambient-pressure soft x-ray synchrotron-radiation photoelectron spectroscopy

2021 ◽  
Vol 28 (1) ◽  
pp. 014008
Author(s):  
Christopher R. O’Connor ◽  
Jorge Anibal Boscoboinik ◽  
Mustafa Karatok ◽  
Matthijs A. van Spronsen
Keyword(s):  
Synchrotron Radiation ◽  
Photoelectron Spectroscopy ◽  
Ambient Pressure ◽  
X Ray
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