Synthesis and crystal structure of Ln2MGe4O12, Ln=rare-earth element or Y; M=Ca, Mn, Zn |
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| Authors: | Vladimir G. Zubkov Ivan I. Leonidov Alexander P. Tyutyunnik Ludmila L. Surat Marina A. Melkozerova Elena V. Zabolotskaya Dina G. Kellerman |
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| Affiliation: | Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences, 91 Pervomayskaya str., Ekaterinburg, 620990, Russia |
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| Abstract: | The crystal structure of the promising optical materials Ln2M2+Ge4O12, where Ln=rare-earth element or Y; M=Ca, Mn, Zn and their solid solutions has been studied in detail. The tendency of rare-earth elements to occupy six- or eight-coordinated sites upon iso- and heterovalent substitution has been studied for the Y2−xErxCaGe4O12 (x=0-2), Y2−2xCexCa1+xGe4O12 (x=0-1), Y2Ca1−xMnxGe4O12 (x=0-1) and Y2−xPrxMnGe4O12 (x=0-0.5) solid solutions. A complex heterovalent state of Eu and Mn in Eu2MnGe4O12 has been found. |
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| Keywords: | Rare-earth luminescent materials Crystal structure Germanates X-ray powder diffraction |
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