Ternary systems Sr-{Ni,Cu}-Si: Phase equilibria and crystal structure of ternary phases
- Author(s)
- Nataliya Melnychenko-Koblyuk, Andrij Grytsiv, Peter Franz Rogl, Gerald Giester, Jaroslaw Wosik, Gerhard Nauer
- Abstract
Phase relations were established in the Sr-poor part of the ternary systems Sr–Ni–Si (900 1C) and Sr–Cu–Si (800 1C) by light optical microscopy, electron probe microanalysis and X-ray diffraction on as castand annealed alloys. Two new ternary compounds SrNiSi3 (BaNiSn3-type) and SrNi9_xSi4+x (own-type)were found in the Sr–Ni–Si system along with previously reported Sr(NixSi1_x)2 (AlB2-type). The crystalstructure of SrNi9_xSi4+x (own-type, x=2.7, a=0.78998(3), c=1.1337(2) nm; space group P4/nbm) wasdetermined from X-ray single crystal counter to be a low symmetry derivative of the cubic, parentNaZn13-type. At higher Si-content X-ray Rietveld refinements reveal the formation of a vacant site (&)corresponding to a formula SrNi5.5Si6.5&1.0. Phase equilibria in the Sr–Cu–Si system are characterizedby the compounds SrCu2_xSi2+x (ThCr2Si2-type), Sr(CuxSi1_x)2 (AlB2-type), SrCu9_xSi4+x (0rxr1.0;CeNi8.5Si4.5-type) and SrCu13_xSix (4rxr1.8; NaZn13-type). The latter two structure types appearwithin a continuous solid solution. Neither a type-I nor a type-IX clathrate compound was encounteredin the Sr–{Cu,Ni}–Si systems.Structural details are furthermore given for about 14 new ternary compounds from related alloysystems with Ba.
- Organisation(s)
- Department of Physical Chemistry, Department of Mineralogy and Crystallography
- External organisation(s)
- Kompetenzzentrum für elektrochemische Oberflächentechnologie GmbH
- Journal
- Journal of Solid State Chemistry
- Volume
- 183
- Pages
- 565-574
- No. of pages
- 10
- ISSN
- 0022-4596
- DOI
- https://doi.org/10.1016/j.jssc.2009.12.023
- Publication date
- 2010
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 104017 Physical chemistry, 105113 Crystallography
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/537f5f50-61bd-4f2b-9d72-1dcb20eed324