Abstract
Two new quaternary strontium selenium(IV) and tellurium(IV) oxychlorides, namely, Sr 3(SeO 3)(Se 2O 5)Cl 2 and Sr 4(Te 3O 8)Cl 4, have been prepared by solid-state reaction. Sr 3(SeO 3)(Se 2O 5)Cl 2 features a three-dimensional (3D) network structure constructed from strontium(II) interconnected by Cl −, SeO 3 2− as well as Se 2O 5 2− anions. The structure of Sr 4(Te 3O 8)Cl 4 features a 3D network in which the strontium tellurium oxide slabs are interconnected by bridging Cl − anions. The diffuse reflectance spectrum measurements and results of the electronic band structure calculations indicate that both compounds are wide band-gap semiconductors.
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