A novel mixed-anion oxychloride, KBi(SeO₄)(IO₃)Cl, has been hydrothermally synthesized and structurally characterized. The compound crystallizes in the monoclinic space group of P2₁/c with cell parameters of a = 7.8802(2) Å; b = 10.8088(2) Å, c = 10.1364(2) Å, β = 112.849(1)°, V = 795.62(3) ų, and Z = 4. KBi(SeO₄)(IO₃)Cl exhibits a three-dimensional tunnel framework that is composed of three types of atomic groups, i.e., tetrahedral SeO₄, trigonal pyramidal IO₃, and polyhedral BiO₆Cl. Both IO₃ pyramid and BiO₆Cl polyhedron are in strongly acentric coordination due to the influence of I⁵⁺ and Bi³⁺ lone electron pairs. The measurement of UV–vis–NIR spectra for powder KBi(SeO₄)(IO₃)Cl indicates that the material is a wide band gap semiconductor with E_g = 3.9 eV. Theoretical analysis shows that the electron transition from Bi 6p to O 2p states in the BiO₆Cl unit dominates the optical absorption edge. Thermal stability and IR spectrum were also analyzed for the material.

水热合成了一种新型混合阴离子氯氧化物KBi(SeO ₄ )(IO ₃ )Cl并进行了结构表征。该化合物在单斜晶系P 2 ₁ /c空间群中结晶，晶胞参数为a  = 7.8802(2) Å；b  = 10.8088(2) Å, c  = 10.1364(2) Å, β  = 112.849(1)°, V  = 795.62(3) Å ³ , Z  = 4。KBi(SeO ₄ )(IO ₃ )Cl 表现出三维隧道骨架由三类原子团组成，即四面体SeO ₄、三棱锥体IO ₃和多面体BiO ₆ Cl。由于I ⁵⁺和Bi ³⁺孤电子对的影响， IO ₃金字塔和BiO _{6 Cl多面体均处于强无心配位状态。粉末KBi(SeO 4} )(IO ₃ )Cl的UV-vis-NIR光谱测量表明该材料是E _g  = 3.9 eV的宽带隙半导体。_{理论分析表明，BiO 6} Cl单元中电子从Bi 6p态到O 2p态的跃迁主导了光学吸收边。还分析了该材料的热稳定性和红外光谱。