The system Ta-V-Si: Crystal structure and phase equilibria
- Author(s)
- P. Broz, Haiyang Niu, Josef Bursik, Andrij Grytsiv, Xing-Qiu Chen, Gerald Giester, Peter Franz Rogl
- Abstract
Phase relations have been evaluated for the Ta-V-Si system at 1500 and 1200 1C. Three ternary phaseswere found: t1-(Ta,V)5Si3 (Mn5Si3-type), t2-Ta(Ta,V,Si)2 (MgZn2-type) and t3-Ta(Ta,V,Si)2 (MgCu2-type).The crystal structure of t2-Ta(Ta,V,Si)2 was solved by X-ray single crystal diffraction (space group P63/mmc). Atom order in the crystal structures of t1-(Ta,V)5Si3 (Mn5Si3 type) and t3-Ta(Ta,V,Si)2 wasderived from X-ray powder diffraction data. A large homogeneity range was found for t1-(TaxV1_x)5Si3revealing random exchange of Ta and V at a constant Si content. At 1500 1C, the end points of the t1-phase solution (0.082rxr0.624) are in equilibrium with the solutions (Ta1_xVx)5Si3 (Cr5B3 type,0rxr0.128) and (TaxV1_x)5Si3 (W5Si3 type, 0rxr0.048).
- Organisation(s)
- Department of Physical Chemistry, Department of Mineralogy and Crystallography
- External organisation(s)
- Masaryk University, Chinese Academy of Sciences (CAS), Czech Academy of Sciences
- Journal
- Journal of Solid State Chemistry
- Volume
- 187
- Pages
- 114-123
- No. of pages
- 10
- ISSN
- 0022-4596
- DOI
- https://doi.org/10.1016/j.jssc.2011.12.024
- Publication date
- 2012
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 104017 Physical chemistry, 105113 Crystallography
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/d0f2c54c-c710-4718-a51c-f795c9c3fd8f