An IARC working group of 19 experts in chemical carcinogenesis and seven industrial or governmental observers met in October 1996 in Lyon to prepare updated monographs and evaluations on crystalline and amorphous silica, palygorskite (attapulgite), sepiolite, and wollastonite. Monographs on these agents were published previously in Volume 42 of the IARC Monographs (1). Also evaluated by the gro...
