Temperature dependence of the reaction rate coefficient, k, for the D₃⁺ + NH₃ reaction measured between 140 and 300 K. Present data (small circles: raw data measured at single pressure; large circles: averaged raw data; stars: pressure dependence fits) are compared with the value of Smith & Futrell (1974) and with the theoretical capture rate coefficient calculated using the ADO theory. The statistical errors are indicated. The systematic uncertainty of 20 % is omitted for clarity.