Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1491787 | Materials Research Bulletin | 2008 | 6 Pages |
Abstract
The europium copper oxyselenide EuCuOSe has been prepared by reacting Eu, CuO and Se in the ratio 1:1:1 at 1123 K for a period of 10 days in sealed quartz ampoule. The structure has been determined by single-crystal X-ray methods. The compound crystallizes tetragonal in the space group P4/nmm (no. 129) with two formula units in the cell with dimensions a = 393.65(8) pm and c = 871.80(17) pm. The structure is composed of {[(Eu3+)(O2â)4/4(Se2â)4/4]â}â2 double layers separated by copper atoms, which are tetrahedrally coordinated to Se2â anions. According to the resistivity measurements, EuCuOSe is a semiconductor. The magnetic susceptibility data shows the typical non-Curie-Weiss behavior of the 7FJ states of Eu in the 4f6 configuration.
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Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Jaime Llanos, Rodrigo Cortés, VÃctor Sánchez,