β-Technetium - An allotrope with a nonstandard volume-pressure relationship
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2021-06-09 |
| Journal | Physical Review Materials |
| Authors | Emily Siska, D. F. Smith, Christian Childs, Daniel Koury, Paul M. Forster |
| Institutions | University of Nevada, Las Vegas, Argonne National Laboratory |
| Citations | 3 |
Abstract
Section titled “Abstract”In this work, we report the synthesis and structure of the second allotrope of technetium, β-Tc. Transformative pathways are accessed at extreme conditions using the laser-heated diamond anvil cell and confirmed with in situ synchrotron x-ray diffraction and Raman spectroscopy. βTc is fully recoverable to ambient conditions, although counter to our DFT calculations predicting a face-centered-cubic lattice, we observe a tetragonal structure (I4/mmm) that exhibits further tetragonal distortion with pressure. β-Tc has an expanded volume relative to the hcp ground state phase, that when doped with nitrogen has an unexpected volume lowering. Such anomalous behavior is possibly indicative of a rare electronic phase transition in a 4d element.
Tech Support
Section titled “Tech Support”Original Source
Section titled “Original Source”References
Section titled “References”- 1997 - Chemistry of the Elements
- 2000 - Technetium [Crossref]
- 1986 - 3d, 4d and 5d Elements, Alloys and Compounds