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Z. Naturforsch. 2014,
69b, 294 – 298
doi:10.5560/ZNB.2014-3334
An Alternative Crystal Structure of Yb26B12O57 – X-Ray Structure Determination on Flux-synthesized Single Crystals
1 Baker Laboratory, Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853-1301, USA
2 Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, D-70569 Stuttgart, Germany
Reprint requests to Dr. Olaf Reckeweg. Fax: ++1-607-255-4137. E-mail:
olaf.reykjavik@gmx.de
Received December 19, 2013 / published online March 17, 2014
Transparent and colorless single crystals of Yb26B12O57 were obtained by reacting Yb2O3 and B powder at 1000 °C in the presence of a KCl flux for 24 h in silica-jacketed Nb ampoules and subsequent removal of the flux by washing with water. Yb26B12O57 crystallizes in the monoclinic space group C2/m (no. 12, Z = 1) with the lattice parameters a = 2454.1(3), b = 357.78(4), c =1426.7(2) pm and β =115.111(6)°, and its structure differs slightly from that of a known compound with the same stoichiometry. Raman spectra of single crystals of the title compound were recorded and compared to those of known borate compounds.
Key words: Ytterbium, Borate, Oxide, Raman Spectra, Structure Elucidation