Ammonium tetrathiotungstate

Ammonium tetrathiotungstate is a chemical compound with the chemical formula .

Synthesis

Ammonium tetrathiotungstate can be obtained by the reaction of tungstic acid, ammonia, and hydrogen sulfide in a water bath at 65-70°C:

Physical properties

Ammonium tetrathiotungstate forms yellow to orange crystals, soluble in water.

The compound decomposes under heat to produce tungsten trisulfide at 170-280°C and tungsten disulfide at 260-500°C.

Uses

The compound is used in materials science and catalysis.

References