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Synthesis, crystal structure investigation and magnetism of the complex metal-rich boride series Cr x (Rh1−y Ru y )7−x B3 (x=0.88–1; y=0–1) with Th7Fe3-type structure
- Source :
-
Journal of Solid State Chemistry . Aug2012, Vol. 192, p331-336. 6p. - Publication Year :
- 2012
-
Abstract
- Abstract: Powder samples and single crystals of the new complex boride series Cr x (Rh1−y Ru y )7−x B3 (x=0.88–1; y=0–1) have been synthesized by arc-melting the elements under purified argon atmosphere on a water-cooled copper crucible. The products, which have metallic luster, were structurally characterized by single-crystal and powder X-ray diffraction as well as EDX measurements. Within the whole solid solution range the hexagonal Th7Fe3 structure type (space group P63 mc, no. 186, Z=2) was identified. Single-crystal structure refinement results indicate the presence of chromium at two sites (6c and 2b) of the available three metal Wyckoff sites, with a pronounced preference for the 6c site. An unexpected Rh/Ru site preference was found in the Ru-rich region only, leading to two different magnetic behaviors in the solid solution: The Rh-rich region shows a temperature-independent (Pauli) paramagnetism whereas an additional temperature-dependent paramagnetic component is found in the Ru-rich region. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00224596
- Volume :
- 192
- Database :
- Academic Search Index
- Journal :
- Journal of Solid State Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 78031606
- Full Text :
- https://doi.org/10.1016/j.jssc.2012.04.041