Measurement of Very Small Quantities of Asbestos and Quartz.
NIOSH 1976 Jun:53-82
The differences in structure of various asbestos materials are discussed with methods for the measurement of very small quantities of asbestos and quartz. Chrysotile (12001295), hydrated magnesium- silicate, has a layered structure with circles and spirals. In antigorite, the silica tetrahedra is directly bonded first to one then to the other of the adjacent magnesia. Amphiboles have a ribbon-like structure, the fibrils having a number of ribbons twisted together. Photographs and charts are presented which give the details of the methods for measuring very small quantities of asbestos (1332214) and quartz (1317799).
NIOSH-Contract; Contract-210-75-0027; Minerals; Dust-control; Silicates; Chemical-structure; Analytical-methods; Measurement-methods;
12001-29-5; 1332-21-4; 1317-79-9;
Division of Physical Sciences and Engineering, NIOSH, Cincinnati, Ohio