| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1487325 | Materials Research Bulletin | 2015 | 8 Pages |
•CsSAsTe presents a reversible phase transition at 213/211 K on heating–cooling runs.•CsSAsTe crystallizes, at T = 120 K, in the monoclinic system P21/c.•CsSAsTe crystallizes, at T = 275 K, in the trigonal system R3¯c.•(S/As)O4 tetrahedra are the main disordered units in the structure.
Cesium sulfate arsenate tellurate (CsSAsTe) presents one reversible phase transition of the first-order type at 213/211 K on heating–cooling runs. Indeed, it crystallizes at T = 120 K in the monoclinic system P21/c and at T = 275 K, in the trigonal system R3¯c . These crystal structures are built from isolated (HAsO42−, SO42−) tetrahedra and (TeO66−) octahedra, they form tunnels where Cs+ cations and some hydrogen atoms are placed. The cohesion of these structures is assured on the one hand by the interaction between Cs+ and the oxygen atoms and on the other hand, by the presence of hydrogen bonds.
Graphical abstractProjection of the structure of the new CsSAsTe material at 120 K.Figure optionsDownload full-size imageDownload as PowerPoint slide
