Recent research on the far infrared absorption of the free radical “tanane” (nitroxyde tetramethyl-2, 2, 6, 6,-piperidine oxyle, C9H18NO) in connection with its ferroelectric-ferroelastic transition at 14° C1, 2, 3has shown that conventional sample preparation techniques are unsuitable. A new method which offers certain advantages has been developed and is described here since it has potential applicability to other powder samples and can be readily adapted for measurements at higher frequencies.