New investigations combining single crystal‐ and synchrotron‐based powder X‐ray diffraction data revealed that Ba[Au₂SnS₄] crystallizes in the orthorhombic crystal system in space group C222₁ instead of P2₁2₁2 as reported earlier. While the principle crystal structure is not altered, there are significant differences of the interatomic distances Au‐S and Sn‐S. A salient property of this crystal structure is the partial framework composed of AuS₂ dumbbells and SnS₄ tetrahedra to form chains [(Au₂SnS₄)^2–]_∞ propagating in the [100] direction. Within the chains a short Au···Au separation of 2.9538(13) Å is observed, while the interchain Au···Au separation is longer at 3.383 Å. The Ba²⁺ cation is eightfold coordinated by S^2– anions in a distorted bicapped trigonal prismatic environment BaS₈. These polyhedra share all S^2– anions thus generating a three‐dimensional network. This connection Scheme generates voids along [100] hosting [(Au₂SnS₄)^2–]_∞ chains. In addition, the compound has been shown to be luminescent at the blue‐green spectral range with emission maximum at approximately 21000 cm^–1.

中文翻译：

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钡金（I）-四硫代锡酸盐（IV），Ba [Au2SnS4]的重新研究，具有短的AuI···AuI分离，显示出发光特性

结合单晶和基于同步加速器的粉末X射线衍射数据进行的新研究表明，Ba [Au ₂ SnS ₄ ]在正交晶体系统C 222 _1的空间群中结晶，而不是先前报道的P 2 ₁ 2 ₁ 2。尽管基本晶体结构没有改变，但原子间距离Au‐S和Sn‐S存在显着差异。该晶体结构的显着性质是由AuS ₂哑铃和SnS ₄四面体构成链[[Au ₂ SnS ₄ ] ^2– ] _∞的部分骨架。沿[100]方向传播。在链内观察到短的Au ··· Au间距为2.9538（13）Å，而链间的Au ··· Au间距更长，为3.383Å。Ba ²⁺阳离子在扭曲的二尖峰的三边形棱柱形环境BaS _8中被S ^2–阴离子配位八倍。这些多面体共享所有S ^2–阴离子，从而生成三维网络。该连接方案沿[100]承载[（Au ₂ SnS ₄）^2– ] _∞产生空隙链。此外，该化合物已显示出在蓝绿色光谱范围内发光，最大发射量约为21000 cm ^–1。