|
Z. Naturforsch. 2014,
69b, 417 – 422
doi:10.5560/ZNB.2014-3335
Synthesis and Crystal Structure of Pd5InSe
1 Universität Leipzig, Institut für Anorganische Chemie, Johannisallee 29, 04103 Leipzig, Germany
2 Universität Leipzig, Institut für Mineralogie, Kristallographie und Materialwissenschaft, Scharnhorststraße 20, 04275 Leipzig, Germany
Reprint requests to Prof. Dr. Holger Kohlmann. Fax: +49 341 9736199. E-mail:
holger.kohlmann@uni-leipzig.de
Received December 19, 2013 / published online April 7, 2014
Pd5InSe has been prepared from the elements. The use of iodine as a mineralizing agent enables the synthesis of single-phase powder samples as well as of single crystals. Pd5InSe is stable in cold air, but reacts to give Pd, In2O3 and Pd4Se at 400 °C. The crystal structure of Pd5InSe was determined from single-crystal X-ray diffraction data (space group P4/mmm, a = 4.0255(7), c = 6.972(1) Å, z(Pd2) = 0.28111(8)) and belongs to the Pd5TlAs-type structure with full occupation of all atomic sites. EDX analysis on the single crystal (Pd5.0(1)In0.99(3)Se1.0(1)) confirms the stoichiometric
composition. The relationship to the cubic close packing (Cu-type structure), which may be visualized by the crystal chemical formula Pd4PdTlAs□, is proven by a Bärnighausen symmetry tree.
Key words: Palladium, Cubic Close Packing, Single-crystal X-Ray Diffraction, Bärnighausen Symmetry Tree, Pd5TlAs Type