Friedrich, Daniel and Schlosser, Marc and Pfitzner, Arno (2014) Synthesis and Structural Characterization of Cs2Ga2Se5. ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 640 (5). pp. 826-829. ISSN 0044-2313, 1521-3749
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Cs2Ga2Se5 was obtained by the reaction of CsN3 with stoichiometric amounts of GaSe and Se at elevated temperature. It forms yellow crystals embedded in a pure orange microcrystalline powder. The crystal structure of Cs2Ga2Se5 was determined by single-crystal X-ray diffraction at 123 K. The compound crystallizes monoclinically in the space group C2/c (No. 15) with a = 15.3911(5) angstrom, b = 7.3577(2) angstrom, c = 12.9219(3) angstrom, = 126.395(3)degrees, V = 1177.89(7) angstrom(3), and Z = 4. The structure features one-dimensional chains (1)[Ga2Se3(Se-2)(2-)], consisting of edge- and corner sharing GaSe4 tetrahedra. Raman spectroscopic measurements reveal vibrational bands of the Se-2(2-) units at 236 cm(-1), and the bands of Ga-Se vibrations at 254 and 273 cm(-1). UV/Vis diffuse reflectance spectroscopy shows the bandgap at about 1.95 eV.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SOLVOTHERMAL SYNTHESIS; ELEMENTS; ANIONS; Cesium; Crystal structure; Polychalcogenides; Raman spectroscopy; Selenogallate |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Arno Pfitzner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Nov 2019 10:07 |
| Last Modified: | 15 Nov 2019 10:07 |
| URI: | https://pred.uni-regensburg.de/id/eprint/10395 |
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