All Natural

摘要

Occupational asbestos exposure is usually associated with one of two classes of minerals: amphibole and serpentine. Of these, amphibole asbestos is generally regarding as by far the more hazardous. At the same time, amphibole minerals are present in a variety of rocks. Although the asbestiform habit is relatively rare and restricted to specific occurrences and types of amphiboles, many amphiboles have an elongated habit that fits a generic definition of fibers used in many regulations, namely any particle longer than 5 μm and with at least a 3:1 aspect ratio.