In-situ X-ray diffraction measurements of the γ-ε transition boundary of iron in an internally-heated diamond anvil cell

2009 ◽  
Vol 282 (1-4) ◽  
pp. 252-257 ◽  
Author(s):  
Tetsuya Komabayashi ◽  
Yingwei Fei ◽  
Yue Meng ◽  
Vitali Prakapenka
Keyword(s):  
Diamond Anvil Cell ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transition Boundary ◽  
Diamond Anvil

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.

Construction of laser-heated diamond anvil cell system for in situ x-ray diffraction study at SPring-8

2001 ◽  
Vol 72 (2) ◽  
pp. 1289 ◽  
Author(s):  
Tetsu Watanuki ◽  
Osamu Shimomura ◽  
Takehiko Yagi ◽  
Tadashi Kondo ◽  
Maiko Isshiki
Keyword(s):  
Diffraction Study ◽  
Diamond Anvil Cell ◽  
Cell System ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diamond Anvil ◽  
Laser Heated

In situ synchrotron X-ray diffraction study of the formation of TaB2 from the elements in a laser heated diamond anvil cell

2010 ◽  
Vol 12 (12) ◽  
pp. 2059-2064 ◽  
Author(s):  
Björn Winkler ◽  
Erick A. Juarez-Arellano ◽  
Alexandra Friedrich ◽  
Lkhamsuren Bayarjargal ◽  
Florian Schröder ◽  
...  
Keyword(s):  
Diffraction Study ◽  
Diamond Anvil Cell ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diamond Anvil ◽  
Laser Heated

An easy to use X-ray collimator for Mao-Bell type diamond anvil cell

2006 ◽  
Vol 21 (4) ◽  
pp. 320-322 ◽  
Author(s):  
P. Ch. Sahu ◽  
N. R. Sanjay Kumar ◽  
N. V. Chandra Shekar ◽  
N. Subramanian
Keyword(s):  
High Pressure ◽  
Diamond Anvil Cell ◽  
Radiation Safety ◽  
Incident Beam ◽  
X Ray Diffraction ◽  
X Ray ◽  
Safety Requirements ◽  
Diamond Anvil ◽  
Special Precaution

An incident beam X-ray collimator for Mao-Bell type diamond anvil cell (DAC) has been developed. Alignment of the collimator is carried out in situ while viewing the image of the collimated X-ray spot formed on a thin layer of fluorescent material spread on the diamond anvil culets with the help of a microscope. Special precaution has been taken to meet the radiation safety requirements during alignment and routine use. This collimator is of immense help for laboratory based high pressure X-ray diffraction experiments.

HIGH-PRESSURE STRUCTURE STUDY OF CuBa2Ca3Cu4O10 + δ SUPERCONDUCTOR

2005 ◽  
Vol 19 (06) ◽  
pp. 313-316
Author(s):  
X. M. QIN ◽  
Y. YU ◽  
G. M. ZHANG ◽  
F. Y. LI ◽  
J. LIU ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Room Temperature ◽  
Diamond Anvil Cell ◽  
Structure Study ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diamond Anvil ◽  
Murnaghan Equation

In-situ high-pressure energy dispersive X-ray diffraction measurements on CuBa 2- Ca 3 Cu 4 O 10 + δ (Cu-1234) have been performed by using diamond anvil cell (DAC) device with synchrotron radiation. The results suggest that the crystal structure of Cu-1234 superconductor is stable under pressures up to 34 GPa at room temperature. According to the Birch–Murnaghan equation of state, the bulk modulus is obtained to be ~ 150 GPa.

In situ synchrotron X-ray diffraction in the laser-heated diamond anvil cell: Melting phenomena and synthesis of new materials

2014 ◽  
Vol 277-278 ◽  
pp. 15-30 ◽  
Author(s):  
Ashkan Salamat ◽  
Rebecca A. Fischer ◽  
Richard Briggs ◽  
Malcolm I. McMahon ◽  
Sylvain Petitgirard
Keyword(s):  
Diamond Anvil Cell ◽  
New Materials ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diamond Anvil ◽  
Laser Heated

In situ high-pressure crystallization and compression of halogen contacts in dichloromethane

2005 ◽  
Vol 61 (5) ◽  
pp. 595-600 ◽  
Author(s):  
Marcin Podsiadło ◽  
Kamil Dziubek ◽  
Andrzej Katrusiak
Keyword(s):  
Diamond Anvil Cell ◽  
Crystal Habit ◽  
Temperature Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Intermolecular Contacts ◽  
Diamond Anvil ◽  
Pressure Crystallization ◽  
Low Temperature Phase

The structure of dichloromethane, CH2Cl2, crystallized in situ in a diamond–anvil cell, has been determined by single-crystal X-ray diffraction at 1.33 and 1.63 GPa. The pressure-frozen crystal was determined to be orthorhombic, with the space group Pbcn, and isostructural with the low-temperature phase at 0.1 MPa. The CH2Cl2 molecules are located on one set of crystallographic twofold axes. The characteristics determined for the CH2Cl2 crystal (compression of the close intermolecular contacts, molecular association and the crystal habit of dichloromethane) suggest that the crystal cohesion forces are dominated by H...Cl interactions rather than by Cl...Cl attractions.

Reversible phase transitions in Na2S under pressure: a comparison with the cation array in Na2SO4

2001 ◽  
Vol 57 (2) ◽  
pp. 151-156 ◽  
Author(s):  
A. Vegas ◽  
A. Grzechnik ◽  
K. Syassen ◽  
I. Loa ◽  
M. Hanfland ◽  
...  
Keyword(s):  
Room Temperature ◽  
Diamond Anvil Cell ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
Rietveld Refinements ◽  
X Ray ◽  
Diamond Anvil ◽  
Binary Compounds ◽  
Reversible Phase

The structural behavior of the antifluorite Na2S, disodium sulfide, has been studied under pressure up to 22 GPa by in situ synchrotron X-ray diffraction experiments in a diamond anvil cell at room temperature. At approximately 7 GPa, Na2S undergoes a first phase transition to the orthorhombic anticotunnite (PbCl2) structure (Pnma, Z = 4). The lattice parameters at 8.2 GPa are a = 6.707 (5), b = 4.120 (3), c = 8.025 (4) Å. At approximately 16 GPa, Na2S undergoes a second transition adopting the structure of the Ni2In-type (P63/mmc, Z = 2). The lattice parameters at 16.6 GPa are a = 4.376 (18), c = 5.856 (9) Å. Both pressure-induced phases have been confirmed by full Rietveld refinements. An inspection of the cation array of Na2SO4 reveals that its Na2S subarray is also of the Ni2In-type. This feature represents a new example of how the cation arrangements in ternary oxides correspond to the topology of the respective binary compounds. We discuss analogies between the insertion of oxygen and the application of pressure.

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