Two UV inorganic yttrium selenite optical materials, namely, Y(HSeO₃)(SeO₃)(H₂O)·(H₂O) (1) and Y₂(SeO₃)₂(SeO₄)(H₂O)₂·(H₂O)_0.75 (2), have been synthesized successfully by hydrothermal reactions. Of these, Y₂(SeO₃)₂(SeO₄)(H₂O)₂·(H₂O)_0.75 (2) is a new mixed valent selenium oxide containing Se(IV) and Se(VI) cations simultaneously. Y(HSeO₃)(SeO₃)(H₂O)·(H₂O) (1) shows a 3D structure composed of 2D yttrium selenite layers linked by O−H···O bonds. Y₂(SeO₃)₂(SeO₄)(H₂O)₂·(H₂O)_0.75 (2) exhibits a 3D structure composed of 2D yttrium selenite layers connected by SeO₄ tetrahedron. Y(HSeO₃)(SeO₃)(H₂O)·(H₂O) (1) crystallized in a chiral space group P2₁2₁2₁ and could display a moderate SHG intensity about 0.7 times of the commercial KH₂PO₄ (KDP). Its powder laser damage threshold quantity was estimated to be 120.2 MW/cm², which is about 46.2 times that of AGS (2.6 MW/cm²). UV-vis-NIR spectra reflectance spectra showed that these solids are wide band gap compounds with Eg of 5.5 and 5.1 eV respectively. Theoretical calculations disclosed that Y(HSeO₃)(SeO₃)(H₂O)·(H₂O) (1) is an indirect band gap structures and its bandgaps is determined by O and Se atoms.

两种紫外无机亚硒酸钇光学材料，即Y(HSeO ₃ )(SeO ₃ )(H ₂ O)·(H ₂ O) (1)和Y ₂ (SeO ₃ ) ₂ (SeO ₄ )(H ₂ O) ₂ ·(H ₂ O) _0.75 (2),已通过水热反应成功合成。其中，Y ₂ (SeO ₃ ) ₂ (SeO ₄ )(H ₂ O) ₂ ·(H ₂ O) _0.75(2) 是一种同时含有 Se(IV) 和 Se(VI) 阳离子的新型混合价硒氧化物。Y(HSeO ₃ )(SeO ₃ )(H ₂ O)·(H ₂ O) (1) 显示了由通过 O−H···O 键连接的 2D 亚硒酸钇层组成的 3D 结构。Y ₂ (SeO ₃ ) ₂ (SeO ₄ )(H ₂ O) ₂ ·(H ₂ O) _{0.75 (2) 呈现出由通过SeO 4}四面体连接的2D亚硒酸钇层组成的3D结构。Y(HSeO ₃ )(SeO ₃ )(H ₂ O)·(H ₂O) (1) 在手性空间群P 2 ₁ 2 ₁ 2 ₁中结晶，可以显示适度的 SHG 强度，约为商业 KH ₂ PO ₄ (KDP) 的 0.7 倍。其粉末激光损伤阈值量估计为120.2  MW/cm ²，约为AGS（2.6  MW/cm ²）的46.2倍。紫外-可见-近红外光谱反射光谱显示这些固体是宽带隙化合物，Eg分别为 5.5 和 5.1  eV。理论计算表明Y(HSeO ₃ )(SeO ₃ )(H ₂ O)·(H ₂O) (1)是一种间接带隙结构，其带隙由O和Se原子决定。