Abstract The crystals of the Tutton’s salt are the promising material for the solar-blind technology. In this present work, single crystals of the Tutton’s salt family having empirical formula (NH4)2Co (Crx S1-xO4)2.6H2O (ACOCRSH), were grown by the slow thermal evaporation of the aqueous solution technique. These types of isomorphic inorganic materials belong to the monoclinic system with factor group symmetry C52h. The group factor analysis demonstrates that these types of crystals have total 234 normal modes of vibrations including three acoustic translational modes. The Raman spectroscopy measurements of the sample crystal were carried out in the range of 100-4000 cm-1, whereas the FTIR spectroscopy measurements of the sample crystal were taken place in the region between 400-4000 cm-1. In addition, the determination of the internal and external modes of vibrations of the [Co(H2O)6]2+ octahedral complex, NH4+, CrO42- and SO42- tetrahedra and H2O molecules from the experimental spectra and their assignments have been investigated rigorously.

中文翻译：

---

(NH4)2Co CrxS1-xO42.6H2O Tutton's盐的合成及振动光谱

摘要 塔顿盐晶体是日盲技术的一种很有前途的材料。在目前的工作中，具有经验式 (NH4)2Co (Crx S1-xO4)2.6H2O (ACOCRSH) 的 Tutton 盐族单晶通过水溶液技术的缓慢热蒸发生长。这些类型的同构无机材料属于因子群对称性为C52h的单斜晶系。群因子分析表明，这些类型的晶体共有 234 种正常振动模式，包括三种声学平移模式。样品晶体的拉曼光谱测量在 100-4000 cm-1 范围内进行，而样品晶体的 FTIR 光谱测量在 400-4000 cm-1 范围内进行。此外，