Download Asbestiform fibers : nonoccupational health risks by National Research Council, Division on Earth and Life PDF

By National Research Council, Division on Earth and Life Studies, Commission on Life Sciences, Board on Toxicology and Environmental Health Hazards, Committee on Nonoccupational Health Risks of Asbestiform Fibers

Greater than 30 million a whole bunch asbestos utilized in the U.S. in view that 1900 is current as insulation in workplaces and faculties, as vinyl-asbestos floor in houses, and in different universal items. This quantity provides an evaluate of the relation of those fibers to precise ailments and the level of non-occupational hazards linked to them.

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ASBESTIFORM FIBERS: HISTORICAL BACKGROUND, TERMINOLOGY, AND PHYSICOCHEMICAL PROPERTIES Figure 2-2. Electron microphotograph of a cross section of chrysotile fibers displaying the scroll-like and tubular growth of the layered serpentine structure. From Yada, 1967. Figure 2-3. Diagram of the structure and cleavage of amphibole crystals. Because of structural weakness, the crystal preferentially breaks along the (110) and (110) planes, parallel with the c-axis, yielding acicular fragments. From Zoltai, 1979.

The arrangement of atoms is called the CRYSTAL STRUCTURE. CRYSTALLIZATION HABIT refers to the distinct nature and shapes of individual crystals or aggregations of several crystals. , according to the dominant geometric shape. The basic properties of minerals usually do not vary with different crystallization habits, but a noteworthy exception is the asbestiform habit. ASBESTIFORM HABIT refers to the unusual crystallization habit of a mineral when the crystals are thin, hairlike fibers. Historically, the definition of the asbestiform habit was based primarily on appearance, and the properties were only implied.

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