90-kilobar diamond-anvil high-pressure cell for use on an automatic diffractometer.
D Schiferl1, J C Jamieson, J E Lenko
1Department of Geophysical Sciences, University of Chicago, Chicago, IL 60637, USA.
The Review of Scientific Instruments
|March 1, 1978
Summary
A new gasketed diamond-anvil cell enables reliable X-ray data collection for single crystals under over 90 kilobars of hydrostatic pressure. This system allows rapid, routine high-pressure crystal structure determination, even for highly absorbing materials.
Area of Science:
- Crystallography
- Materials Science
- High-Pressure Physics
Background:
- High-pressure research requires specialized equipment for accurate sample analysis.
- Diamond-anvil cells are crucial for achieving extreme pressures in materials studies.
- Existing methods may have limitations in X-ray access and sample handling.
Purpose of the Study:
- To describe a novel gasketed diamond-anvil high-pressure cell.
- To enable reliable X-ray intensity data collection from single-crystal samples.
- To facilitate rapid and routine high-pressure crystal structure determination.
Main Methods:
- Utilizing a gasketed diamond-anvil cell on a four-circle automatic diffractometer.
- Applying forces normal to diamond faces for enhanced reliability.
- Designing the cell for exceptional X-ray access, suitable for highly absorbing materials.
Main Results:
- Achieved truly hydrostatic pressures exceeding 90 kilobars.
- Demonstrated the system's suitability for highly absorbing materials due to non-transmissive X-ray path.
- Successfully performed rapid, reliable, and routine high-pressure crystal structure determinations on ruby.
Conclusions:
- The described diamond-anvil cell is a reliable tool for high-pressure crystallography.
- The system offers significant advantages in X-ray access and sample compatibility.
- Enables routine and efficient determination of crystal structures under extreme hydrostatic pressures.
