The invention relates to a device for producing small particles of a certain substance. The device includes first inlet means (4) for a solution or a suspension containing the substance and second inlet means (3) for an atomizing agent. The device further includes mixing means (12) for the solution and the atomizing agent and outlet means (13) for the particles. First (9, 10) and second (14, 11) conduit means are provided from the first (4) and second (3) inlet means respectively to the mixing means (12). According to the invention the first (9, 10) and second (14, 11) conduit means meet each other at the mixing means (12) at an angle of at least 30°. The invention also relates to a corresponding method and to use of the device and the method as well as to particles obtained by the method.