Crystal data for ammonium thiosulphate (NH₄)₂S₂O₃

The current data listed in the powder diffraction file for ammonium thiosulphate are of poor quality. The compound crystallizes as thick tablets in a monoclinic cell, a = 10.224 (6), b = 6.500 (5), c = 8.802 (5) Å, β = 94.57 (5)°, Z = 4, space group C2/m. New indexed powder data are given.