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Exploring new material systems is a highly significant task in the field of inorganic chemistry. A new mixed-valent selenium compound, Hg3Se(SeO3)(SO4), was successfully synthesized through in situ reactions. This compound exhibits a novel three-dimensional structure composed of Hg3Se(SO4) layers bridged by SeO3 trigonal pyramids. It is the first structure containing (SeO3)2–, (SO4)2–, and Se2– simultaneously. In addition, Hg3Se(SeO3)(SO4) possesses a wide bandgap (3.5 eV), moderate birefringence (Cal:0.064@546 nm, Exp:0.069@546 nm), a high laser-induced damage threshold (23.35 MW cm–2), and a wide transmittance window (0.28–6.6 μm). Our work demonstrates that mixed-valent (+4, −2) selenite selenide can be potential optical materials for the mid-infrared region.
Li et al. (Fri,) studied this question.
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