Hg<sub>3</sub>Se(SeO<sub>3</sub>)(SO<sub>4</sub>): A Mixed-Valent Selenium Compound with Mid-Infrared Transmittance Obtained by In Situ Reaction
Pengfei Li, Chun‐Li Hu, Bingxuan Li, Jiang‐Gao Mao, Fang Kong
Abstract
Exploring new material systems is a highly significant task in the field of inorganic chemistry. A new mixed-valent selenium compound, Hg 3 Se(SeO 3 )(SO 4 ), was successfully synthesized through in situ reactions. This compound exhibits a novel three-dimensional structure composed of Hg 3 Se(SO 4 ) layers bridged by SeO 3 trigonal pyramids. It is the first structure containing (SeO 3 ) 2–, (SO 4 ) 2–, and Se 2– simultaneously. In addition, Hg 3 Se(SeO 3 )(SO 4 ) 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.