Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10653509 | Solid State Communications | 2005 | 6 Pages |
Abstract
High-pressure X-ray diffraction investigations up to 25 GPa using diamond anvil cell techniques (DAC) have been carried out on erbium and a series of erbium hydrides. The equations of state have been evaluated for ErH1.95, ErH2.091 (in the β-phase) and for γ-ErH3. For comparison, the compressibility of pure erbium metal has also been determined in the same pressure range. A rapid drop of lattice volume at a pressure of about 14.5 GPa has been observed for ErH2.091 accompanied by a color change of reflected light. This phenomenon was not observed in ErH1.95 where the molar volume varied smoothly up to the highest pressure. A pressure-induced transformation from hexagonal to cubic phase has been detected for erbium trihydride. For pure erbium metal, a transition from hexagonal to samarium structure has been revealed, confirming previously reported behavior.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
T. Palasyuk, M. Tkacz, P. Vajda,