The c-DAC: A novel cubic diamond anvil cell with large sample volume/area and multidirectional optics

2006 ◽  
Vol 77 (11) ◽  
pp. 115105 ◽  
Author(s):  
Eran Sterer ◽  
Isaac F. Silvera
Keyword(s):  
Diamond Anvil Cell ◽  
Sample Volume ◽  
Large Sample ◽  
Large Sample Volume ◽  
Diamond Anvil

Gasketing optimized for large sample volume in the diamond anvil cell: first application to MgGeO3and implications for structural systematics of the perovskite to post-perovskite transition

2008 ◽  
Vol 41 (1) ◽  
pp. 38-43 ◽  
Author(s):  
C. David Martin ◽  
Yue Meng ◽  
Vitali Prakapenka ◽  
John B. Parise
Keyword(s):  
Perovskite Structure ◽  
Diamond Anvil Cell ◽  
Perovskite Phase ◽  
Volume Ratio ◽  
Sample Volume ◽  
X Ray Diffraction ◽  
A Value ◽  
Large Sample Volume ◽  
Diamond Anvil

Structure models of MgGeO3post-perovskite (Cmcm) are presented, along with a structure survey, demonstrating that all perovskite, post-perovskite and CaIrO3-type structures (ABX3) have specific ranges of the volume ratio between cation-centered polyhedra (VA:VB). The quality of the reported diffraction data and MgGeO3structure models is enhancedviaimplementation of a new graphite gasket for the diamond anvil cell, which stabilizes a larger sample volume, improving powder statistics during X-ray diffraction, andviathe thermal insulation required to achieve ultra-high temperatures while laser-heating samples at pressures near 100 GPa. The structure survey supports the theory that the pressure–temperature conditions under which the perovskite/post-perovskite phase transition occurs can be estimated by extrapolating the change inVA:VBto a value of 4, which corresponds to a maximum tilt ofBX6octahedra in the perovskite structure (Pbnm) where inter-octahedral anion–anion distances match the average intra-octahedral anion–anion distance. Once these short inter-octahedral distances between anions are reached in the perovskite structure, further tilting of octahedra and decrease of theVA:VBratio does not occur, driving the transition to post-perovskite structure as pressure is increased.

scholarly journals Lab in a DAC – high-pressure crystal chemistry in a diamond-anvil cell

2019 ◽  
Vol 75 (6) ◽  
pp. 918-926 ◽  
Author(s):  
Andrzej Katrusiak
Keyword(s):  
High Pressure ◽  
Diamond Anvil Cell ◽  
Ambient Pressure ◽  
Elevated Pressure ◽  
Sample Volume ◽  
Chemical Research ◽  
New Era ◽  
New Information ◽  
Intermolecular Contacts ◽  
Diamond Anvil

The diamond-anvil cell (DAC) was invented 60 years ago, ushering in a new era for material sciences, extending research into the dimension of pressure. Most structural determinations and chemical research have been conducted at ambient pressure, i.e. the atmospheric pressure on Earth. However, modern experimental techniques are capable of generating pressure and temperature higher than those at the centre of Earth. Such extreme conditions can be used for obtaining unprecedented chemical compounds, but, most importantly, all fundamental phenomena can be viewed and understood from a broader perspective. This knowledge, in turn, is necessary for designing new generations of materials and applications, for example in the pharmaceutical industry or for obtaining super-hard materials. The high-pressure chambers in the DAC are already used for a considerable variety of experiments, such as chemical reactions, crystallizations, measurements of electric, dielectric and magnetic properties, transformations of biological materials as well as experiments on living tissue. Undoubtedly, more applications involving elevated pressure will follow. High-pressure methods become increasingly attractive, because they can reduce the sample volume and compress the intermolecular contacts to values unattainable by other methods, many times stronger than at low temperature. The compressed materials reveal new information about intermolecular interactions and new phases of single- and multi-component compounds can be obtained. At the same time, high-pressure techniques, and particularly those of X-ray diffraction using the DAC, have been considerably improved and many innovative developments implemented. Increasingly more equipment of in-house laboratories, as well as the instrumentation of beamlines at synchrotrons and thermal neutron sources are dedicated to high-pressure research.

scholarly journals 3D Carbon-Electrode Dielectrophoresis for Enrichment of a Small Cell Population from a Large Sample Volume

2016 ◽  
Vol 72 (1) ◽  
pp. 97-103
Author(s):  
M. Islam ◽  
R. Natu ◽  
M. F. Larraga-Martinez ◽  
G. C. Davila ◽  
R. Martinez-Duarte
Keyword(s):  
Cell Population ◽  
Sample Volume ◽  
Small Cell ◽  
Carbon Electrode ◽  
Large Sample ◽  
Large Sample Volume

scholarly journals Opposed type double stage cell for Mbar pressure experiment with large sample volume

2020 ◽  
Vol 40 (1) ◽  
pp. 175-183 ◽  
Author(s):  
Yoshio Kono ◽  
Curtis Kenney-Benson ◽  
Guoyin Shen
Keyword(s):  
Sample Volume ◽  
Large Sample ◽  
Large Sample Volume ◽  
Pressure Experiment

Design of a Double Radius Type Large Volume Cubic Anvil for Achieving Longer Lifetime and Higher Cell Pressure

2013 ◽  
Vol 589-590 ◽  
pp. 670-674
Author(s):  
Qi Gang Han ◽  
Qiang Zhang ◽  
Ya Dong Chen ◽  
Yue Fen Li ◽  
Hong An Ma ◽  
...  
Keyword(s):  
High Pressure ◽  
Large Volume ◽  
Sample Volume ◽  
Effective Solution ◽  
Sample Cell ◽  
Geometrical Condition ◽  
Large Sample ◽  
Large Sample Volume ◽  
High Pressure Apparatus

Large volume cubic anvil (LVCA) have been widely used in cubic high pressure apparatus, which can accommodate a large sample volume (the largest volume of compressed cell is 422 cm3), but they are limited by shorter lifetime (£143000 times) and lower cell pressure (£146 GPa). In this paper, we have designed of a double radius type LVCA, which has three advantages. Firstly, the rate of cell pressure transmitting and the pressurized seal stability of the sample cell can be maintained, which is often sacrificed with optimum the geometrical condition of the anvil. Secondly, the lifetime of double radius type LVCA can be increased about 19.86 % than that of traditional anvil. Thirdly, the cell pressure can be increase about 13.45 % after the modification of the anvil. This work makes an ?effective ?solution ?for ?solve the choke points of LVCA and would be used widely in other types of Multi-anvil apparatuses.

Large sample volume preseparation for trace analysis in isotachophoresis

1985 ◽  
Vol 320 (1) ◽  
pp. 89-97 ◽  
Author(s):  
Vladislav Dolník ◽  
Mirko Deml ◽  
Petr Boček
Keyword(s):  
Trace Analysis ◽  
Sample Volume ◽  
Large Sample ◽  
Large Sample Volume
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