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How does antimony react with sulfur when heated?

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A labeled periodic table entry for antimony shows its symbol Sb, atomic number 51, atomic weight 121.76, electron configuration, and name. It is a solid, weakly acidic other metal with a rhombohedral crystal structure at room temperature. — antimony Properties of antimony.

When heated, metallic antimony reacts easily with sulfur. This chemical reaction results in the formation of antimony sulfides, such as antimony trisulfide ( $S b_{2} S_{3}$ ).12