JOURNAL OF ALLOYS AND COMPOUNDS | 卷:451 |
Synthesis and characterization of LnAg(WO4)(MoO4) | |
Article; Proceedings Paper | |
Fernandez-Martinez, F.1  Colon, C.1  Montero, J. L.1  Atanes, E.1  Rivero, C.2  | |
[1] Univ Politecn Madrid, EUIT Ind, Madrid 28012, Spain | |
[2] Univ Politecn Madrid, ETSI Telecomunicac, E-28040 Madrid, Spain | |
关键词: lanthanides; tungstates; molybdates; optical properties; | |
DOI : 10.1016/j.jallcom.2007.04.065 | |
来源: Elsevier | |
【 摘 要 】
Polycrystalline LnAg(WO4)(MoO4) powders, with Ln = La to Lu and Y, have been obtained by ceramic method. Rictveld refinement for all compounds reveals that they present tetragonal symmetry, space group I4(1)/a (No. 88), where the Ln(3+)/Ag+ ions are located in the 4a atomic positions, since the W/Mo are randomly distributed into 4b crystal sites. In these compounds, a and b lattice parameters take values between those corresponding to tungstate and molybdate compounds. A progressive decrease in the lattice parameters is observed in going from La to Lu derivatives as a consequence of the well-known lanthanide contraction. (c) 2007 Elsevier B.V. All rights reserved.
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