Antimony sulfide is the chemical compound with the formula Sb₂S₃ which crystallizes in an orthorhombic space group. Sb₂S₃ shares striking structural and physical similarities with topological insulator Sb₂Te₃. The orthorhombic phase of Sb₂S₃ belongs to the space group Pnma (number:62) Recently, Sb₂S₃ has been shown to exhibit topological state transition under pressure [1]. Sb₂S₃ crystals exhibit optical band gap at 1.7 -1.8 eV [2] while optical and electronic properties in the monolayer form remain unknown.

Sb₂S₃ crystals measure ~0.5 cm or larger in size, rated at 99.9998% purity, and exhibit strong and sharp Raman signal, ideal environmental stability, and high crystalline order. Crystals are synthesized through flux zone technique to high high crystallinity and enable exfoliation.

Overall characteristics

（1）Topological insulator

（2）High electron mobility semiconductor

（3）2D anisotropic semiconductor 

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