Phase relations and crystal structures in the system Ce-Ni-Zn at 800 °C
- Author(s)
- Andrij Grytsiv, Peter Franz Rogl, Gerald Giester
- Abstract
Phase relations have been established for the system Ce-Ni-Zn in the isothermal section at 800 °C using electron microprobe anal. and X-ray powder diffraction. Phase equil. at 800 °C are characterized by a large region for the liq. phase covering most of the Ce-rich part of the diagram, whereas a Zn-rich liq. is confined to a small region near the Zn-corner of the Gibbs triangle. Whereas soly. of Ce in the binary Ni-Zn phases is negligible, mutual solubilities of Ni and Zn at a const. Ce content are large at 800 °C for most Ce-Zn and Ce-Ni compds. The solid soln. Ce(Ni1-xZnx)5 with the CaCu5-type is continuous throughout the entire section and for the full temp. region from 400 to 800 °C. Substitution of Zn by Ni is found to stabilize the structure of CeZn11 to higher temps. At 800 °C Ce(NixZn1-x)11 (0.03=x=0.22) appears as a ternary soln. phase. Similarly, a rather extended soln. forms for Ce2(NixZn1-x)17 (0=x=0.53). Detailed data on atom site occupation and atom parameters were derived from X-ray structure analyses for single crystals of Ce2+y(NixZn1-x)17, y=0.02, x=0.49 (a=0.87541(3), c=1.25410(4) nm; Th2Zn17 type with space group R3m,RF2=0.018) and Ce(Ni0.18Zn0.82)11 (a=1.04302(2), c=0.67624(3)nm, BaCd11 type with space group I41/amd, RF2=0.049).
- Organisation(s)
- Department of Physical Chemistry, Department of Mineralogy and Crystallography
- Journal
- Journal of Solid State Chemistry
- Volume
- 194
- Pages
- 80-90
- No. of pages
- 11
- ISSN
- 0022-4596
- DOI
- https://doi.org/10.1016/j.jssc.2012.07.032
- 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/4d86c9b4-5829-462f-b467-691a1e2abece