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Z. Naturforsch. 2014, 69b, 409 – 416
doi:10.5560/ZNB.2014-4018
CeNi1−xSb1+yBi1−y Phases with ZrCuSiAs-type and CeNi1.26Sb2 with CaBe2Ge2-type Structure
Konrad Schäfer, Birgit Gerke, Oliver Niehaus, and Rainer Pöttgen
Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, 48149 Münster, Germany
Reprint requests to R. Pöttgen. E-mail: pottgen@uni-muenster.de
Received February 5, 2014 / published online April 7, 2014
Block- and platelet-shaped single crystals of several CeNi1−xSb1+yBi1−y phases with ZrCuSiAs-type structure (space group P4/nmm) were grown from a CeNiSb precursor in bismuth fluxes. The structures of CeNiSb1.19Bi0.81, CeNi0.80Sb1.16Bi0.84 and CeNi0.75Sb1.74Bi0.26 were refined from single-crystal X-ray diffractometer data. The 2b nickel site can be fully or partially occupied, and the bismuth square nets show solid solutions with antimony. CaBe2Ge2-type CeNi2−xSb2 crystals occur as by-products of the crystal growth experiments. The structure of a CeNi1.26Sb2 crystal has been refined. The small difference of the compositions hamper phase analytical studies by powder X-ray diffraction. A polycrystalline CeNiSbBi sample showed Curie-Weiss behavior with an experimental magnetic moment of 2.56(1) μB per Ce atom, indicating purely trivalent cerium. No magnetic ordering is detected down to 2.5 K. A 121Sb Mössbauer spectrum showed an isomer shift of δ =− 8.06(6) mm s−1, substantiating the antimonide character.
Key words: Antimonide, Bismuthide, Crystal Structure, Intermetallics
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