Boron site preference in ternary Ta and Nb boron suicides
- Author(s)
- Carlos A. Nunes, Gilberto C. Coelho, Paulo A. Suzuki, Andrij Grytsiv, Francoise Bourree, Gerald Giester, Peter Franz Rogl
- Abstract
X-ray single crystal (XSC) and neutron powder diffraction data (NPD) were used to elucidate boron site preference for five ternary phases. Ta3Si1-xBx (x=0.112(4)) crystallizes with the Ti3P-type (space group P4(2)/n) with B-atoms sharing the 8g site with Si atoms. Ta5Si3-x (x=0.03(1); Cr5B3- type) crystallizes with space group 14/mcm, exhibiting a small amount of vacancies on the 4 alpha site. Both, Ta-5(Si1-xBx)(3), X=0.568(3), and Nb-5(Si1-xBx)(3), x=0.59(2), are part of solid solutions of M5Si3 with Cr5B3-type into the ternary M-Si-B systems (M=Nb or Ta) with B replacing Si on the 8h site. The D8(8)-phase in the Nb-Si-B system crystallizes with the Ti5Ga4-type revealing the formula Nb5Si3B1-x (x=0.292(3)) with B partially filling the voids in the 2b site of the Mn5Si3 parent type.
- Organisation(s)
- Department of Physical Chemistry, Department of Mineralogy and Crystallography
- External organisation(s)
- Instituto Oceanográfico, Laboratoire Léon Brillouin (CEA-CNRS)
- Journal
- Journal of Solid State Chemistry
- Volume
- 190
- Pages
- 1-7
- No. of pages
- 7
- ISSN
- 0022-4596
- DOI
- https://doi.org/10.1016/j.jssc.2012.01.060
- Publication date
- 2012
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 104017 Physical chemistry, 105113 Crystallography
- Sustainable Development Goals
- SDG 3 - Good Health and Well-being
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/dd6dc037-3903-4a64-8976-4691bfce314b