Synthesis, structure and physicochemical characterization of a noncentrosymmetric, quaternary thiostannate: EuCu2SnS4 |
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Authors: | Jennifer A Aitken Jonathan W Lekse Jin-Lei Yao Rosalynn Quinones |
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Institution: | Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, PA 15282, USA |
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Abstract: | EuCu2SnS4 was prepared by a stoichiometric combination of the elements heated to 700 °C for 125 h. The structure was determined by single crystal X-ray diffraction methods. The compound crystallizes in the noncentrosymmetric, orthorhombic space group Ama2 with a=10.4793(1) Å, b=10.3610(2) Å, c=6.4015(1) Å, Z=4, R1=0.99% and wR2=2.37%. The structure type is that of SrCu2GeSe4. The structure can be described as a three-dimensional network built from near perfect SnS4 and distorted CuS4 tetrahedra together with EuS8 square antiprisms. The dark red compound is a semiconductor with an optical bandgap of 1.85 eV. |
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Keywords: | Thiostannate Europium Chalcogenide Synthesis Lanthanide Sulfide |
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