What Are The Physical Properties Of Aluminum Sulfide?

Aluminum sulfide is a chemical compound with the formula Al2S3. It is an odorless, white to grayish-yellow solid that is insoluble in water but soluble in nonpolar solvents. The physical properties of aluminum sulfide are as follows:

1. Melting point: Aluminum sulfide has a high melting point of 1100 °C, which is indicative of its strong ionic character.

2. Boiling point: The boiling point of aluminum sulfide is not well-defined, as it decomposes before reaching its boiling point.

3. Density: Aluminum sulfide has a density of 2.02 g/cm3, which is higher than most organic compounds but lower than many other inorganic compounds.

4. Solubility: Aluminum sulfide is insoluble in water but soluble in nonpolar solvents such as benzene and carbon tetrachloride.

5. Crystal structure: Aluminum sulfide has a hexagonal crystal structure with space group P63/mmc (No. 194).

6. Hardness: Aluminum sulfide is a relatively hard material with a Mohs hardness of 2.5-3.

7. Thermal conductivity: The thermal conductivity of aluminum sulfide is low, making it a good thermal insulator.

Overall, aluminum sulfide is a solid with a high melting point, low solubility in water, and a hexagonal crystal structure. Its properties make it useful in various applications, including the production of semiconductors and ceramic materials.