Dust chemistry and physics: mineral and vitreous fibres.

Increasing attention is currently being addressed to the many aspects of biological effects of fibres other than asbestos. In part, this interest has been generated by the work of Drs Stanton, Pott and others. The demonstration that durable fibres, of almost any composition, which satisfy certain dimensional requirements can induce tumours when implanted into the pleural or peritoneal cavities of mammals has generated concern over effects analogous to those of asbestos in man. Recent data from Turkey have suggested that fibrous zeolites can also produce mesothelioma in man. The chemical and physical properties of relevant, naturally occurring, as well as man-made mineral fibres are discussed. Particular emphasis is laid on those properties that are believed to be significant determinants of biological activity.