Osmium metal studied under high pressure and nonhydrostatic stress.

@article{Weinberger2008OsmiumMS,
  title={Osmium metal studied under high pressure and nonhydrostatic stress.},
  author={Michelle B. Weinberger and Sarah H. Tolbert and Abby Kavner},
  journal={Physical review letters},
  year={2008},
  volume={100 4},
  pages={
          045506
        }
}
Interest in osmium as an ultra-incompressible material and as an analog for the behavior of iron at high pressure has inspired recent studies of its mechanical properties. We have measured elastic and plastic deformation of Os metal at high pressures using in situ high pressure x-ray diffraction in the radial geometry. We show that Os has the highest yield strength observed for any pure metal, supporting up to 10 GPa at a pressure of 26 GPa. Furthermore, our data indicate changes in the… 
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Powder X-ray diffraction measurements onallic osmium are reported at multi-megabar pressures using both conventional and double-stage diamond anvil cells, with accurate pressure determination ensured by first obtaining self-consistent equations of state of gold, platinum, and tungsten in static experiments up to 500 gigapascals.
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The lattice strain behavior of osmium diboride—a member of a group of third-row transition metal borides associated with hard/superhard behavior—has been studied using radial diffraction in a diamond…
Estimating the Compressibility of Osmium from Recent Measurements of Ir-Os Alloys under High Pressure.
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It was concluded that the bulk modulus for osmium is slightly smaller than that for diamond, and a similar conclusion is obtained upon employing an alternative model, thus strengthening the conclusion that osmia is the densest but not the most incompressible element.
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The compression behavior of osmium metal was investigated up to 280 GPa (volume compression V/Vo = 0.725) under nonhydrostatic conditions at ambient temperature using angle dispersive axial x-ray…
High-pressure radial X-ray diffraction study of osmium to 58 GPa
AbstractNonhydrostatic compression behavior of osmium (Os) was investigated up to 58.2 GPa using radial X-ray diffraction (RXRD) together with lattice strain theory in a diamond-anvil cell. The…
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Dense transition metal borides have recently been identified as superhard materials that offer the possibility of ambient pressure synthesis compared to the conventional high pressure, high…
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References

SHOWING 1-10 OF 58 REFERENCES
Equation of state and shear strength at multimegabar pressures: Magnesium oxide to 227 GPa.
TLDR
The results show that there are significant changes in the degree and character of the elastic anisotropy of MgO at high pressure.
Osmium diboride, an ultra-incompressible, hard material.
TLDR
In this work, two design parameters are applied to identify ultra-incompressible, superhard materials-high valence electron density and high bond covalency and the first example of such a material is OsB2.
Synthesis of Ultra-Incompressible Superhard Rhenium Diboride at Ambient Pressure
TLDR
Rhenium diboride (ReB2), synthesized in bulk quantities via arc-melting under ambient pressure, rivals materials produced with high-pressure methods in properties and may find applications in cutting when the formation of carbides prevents the use of traditional materials such as diamond.
Analysis of lattice strains measured under nonhydrostatic pressure
The equations for the lattice strains produced by nonhydrostatic compression are presented for all seven crystal systems in a form convenient for analyzing x-ray diffraction data obtained by newly…
Stress anisotropy in opposed anvil high−pressure cells
When materials such as sodium chloride are introduced into a piston−cylinder (or other) chamber it is commonly assumed that the state of stress for small loads is nonhydrostatic; as the load is…
Lattice strains in gold and rhenium under nonhydrostatic compression to 37 GPa
Using energy-dispersive x-ray diffraction techniques together with the theory describing lattice strains under nonhydrostatic compression, the behavior of a layered sample of gold and rhenium has…
Strength, anisotropy, and preferred orientation of solid argon at high pressures.
TLDR
Pressure-solidified argon with a boron-epoxy-beryllium composite gasket in a diamond anvil cell with monochromatic synchrotron x-radiation and imaging plates in a radial diffraction geometry is studied to reflect basic changes in van der Waals bondings under ultrahigh pressures.
Effective hydrostatic limits of pressure media for high-pressure crystallographic studies
The behavior of a number of commonly used pressure media, including nitrogen, argon, 2-propanol, a 4:1 methanol–ethanol mixture, glycerol and various grades of silicone oil, has been examined by…
Osmium has the lowest experimentally determined compressibility.
TLDR
It is reported that metallic osmium has a lower compressibility than covalently bonded diamond, and it is found that Ir and Ru are as incompressible as Re.
Lattice preferred orientation and stress in polycrystalline hcp-Co plastically deformed under high pressure
The results of x-ray diffraction data of a polycrystal under nonhydrostatic compression are analyzed for lattice preferred orientation and stress using lattice strain theories with an application to…
...
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5
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