期刊论文详细信息
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
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【 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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