Recently a method using the Wig-L-Bug was described for grinding wool samples to a fine powder for use in the KBr disk technique for infrared spectral study (1). The possibility of using this grinding technique for mica was investigated, as homogeneous pulverisation of mica samples for spectrographic analysis has long been a problem (2). This technique was found to be very satisfactory.
A. Strasheim, K. Buijs, and J. van Wamelen, "A Possible Method of Pulverizing Mica and Other Flaking Materials for Spectrographic Analysis," Appl. Spectrosc. 15, 177-178 (1961)