Two new multinary thioantimonates(III) with d¹⁰ transition metals (TMs) Rb₂HgSb₄S₈ and CdSb₂S₄ have been prepared by environmental-friendly ionothermal method. Rb₂HgSb₄S₈ has [HgS₄]⁶⁻ tetrahedrons, [SbS₃]³⁻ triangular pyramids, free Rb⁺ cations, and exhibits a unique two-dimensional (2D) cluster double-layer architecture. CdSb₂S₄ is the first Cd²⁺-containing multinary thioantimonate(III). It has two kinds of metal centers [SbS₃]³⁻ and [SbS₄]⁵⁻, and exhibits a novel 2D _∞[Sb₂S₄]²⁻ cluster layer, which is constructed by disulfide bonds linking with _∞[Sb₄S₈]⁴⁻ chains. Remarkably, free Cd²⁺ cations as well as disulfide bonds are first found in thioantimonates. The band gaps of Rb₂HgSb₄S₈ and CdSb₂S₄ are 1.80 and 1.57 eV, respectively, which indicates that these compounds are potential semiconductor materials. The birefringences of them are calculated to be 0.128 and 0.143 at 1064 nm, respectively. Theoretical studies using density functional theory have been implemented to further understand the relationship between their band gaps and crystal structures.

通过环境友好的离子热法制备了两种新的具有d ¹⁰过渡金属（TMs）Rb ₂ HgSb ₄ S ₈和CdSb ₂ S _4的多元三价硫锑酸盐（III）。Rb ₂ HgSb ₄ S ₈具有[HgS ₄ ] ^6-四面体，[SbS ₃ ] ^3-三角锥，自由的Rb ⁺阳离子，并展现出独特的二维（2D）簇双层结构。CdSb ₂ S ₄是第一个Cd ²⁺含多元硫代锑酸盐（III）。它具有两种金属中心[SbS ₃ ] ³⁻和[SbS ₄ ] ⁵⁻，并展现出一种新颖的_2D∞ [Sb ₂ S ₄ ] ^2-簇簇层，该簇簇层是由与_∞ [Sb _4]连接的二硫键构成的S ₈ ] ⁴⁻链。值得注意的是，首先在硫代锑酸盐中发现了游离的Cd ²⁺阳离子以及二硫键。Rb ₂ HgSb ₄ S ₈和CdSb ₂ S ₄的带隙分别为1.80和1.57 eV，这表明这些化合物是潜在的半导体材料。计算出它们在1064nm处的双折射为0.128和0.143。已经进行了使用密度泛函理论的理论研究，以进一步了解其带隙与晶体结构之间的关系。