The synthesis of antimony thiourea tetra chloride (ATTC) single crystals by solution technique at room temperature is reported. The complex crystallizes in the orthorhombic space group Pnma with four formula units of Sb[CS(NH 2 ) 2 ] 2 Cl 3 .Cl in the unit cell. The structure has been solved by direct methods and refined to a final-R value of 0.0393. The synthesized crystals are characterized by FT-IR, UV-visible and TGA-DTA techniques.

Antimony thiourea bromide monohydrate (ATBM) single crystals were grown by a solution growth technique at room temperature. Microhardness studies on the grown crystal were carried out using the Vickers microhardness tester to estimate the mechanical strength of the crystal. The FT-IR analysis ascertains the presence of a metal-sulphur bond in ATBM crystals. The thermal decomposition of ATBM crystals was investigated by means of thermogravimetric analysis.

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