Synthesis and powder X-ray diffraction analysis of new mixed rare-earth and selenium oxychlorides with composition LnSeO3Cl |
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| Authors: | Shabalin D G Berdonosov P S Dolgikh V A Oppermann H Schmidt P Popovkin B A |
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| Institution: | (1) Department of Materials Science, M. V. Lomonosov Moscow State University, Leninskie Gory, 119992 Moscow, Russian Federation;(2) Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory, 119992 Moscow, Russian Federation;(3) Institute of Inorganic Chemistry, Technical University of Dresden, Mommsenstraße 13, D-01069 Dresden, Germany |
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| Abstract: | A series of new mixed rare-earth and selenium oxychlorides with composition LnSeO3Cl (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb, or Y) were prepared by annealing together LnOCl and SeO2 in sealed silica tubes. The resulting compounds were characterized by powder X-ray diffraction. The unit cell parameters of the phases were determined. Lanthanum—europium oxychlorides crystallized in the tetragonal system to give the Sillen phases analogously to tellurium compounds with the similar formula, whereas Tb—Yb and Y oxychlorides crystallized in the orthorhombic system. It is likely that the latter oxychlorides are not layered compounds. |
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| Keywords: | Sillen phases rare-earth and selenium oxychlorides powder X-ray diffraction characteristics |
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