By H. Catherine W. Skinner
This accomplished sourcebook describes the chemical, actual, and mineralogical facets of fibrous inorganic fabrics, either artificial and of course happening. A basic description of the fibrous kingdom, the variety of compounds which can undertake this way, and an outline of the features targeted to such fabrics shape the spine of the publication . The authors additionally examine the appliance and use of asbestos and different fibrous fabrics in and assessment their strength as health and wellbeing risks. the data amassed the following may be hugely helpful to clinical investigators and attorneys focused on environmental health.
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Extra resources for Asbestos and Other Fibrous Materials: Mineralogy, Crystal Chemistry, and Health Effects
For example, the idealized chemical formula for both of the mineral species chrys- 24 ASBESTOS AND OTHER FIBROUS MATERIALS otile and lizardite is Mg3Si2O5(OH)4. The two minerals possess similar polymerized silica ions and associated magnesium (Mg) ions, but the threedimensional configuration, or crystal structures, are different. The structure of chrysotile is quite complicated and is discussed later. However, Fig. 2. 1B' presents a simplified version of the general concept. The figure depicts single chains in two different orientations.
We now discuss in some detail the mineral groups noted for their fibrous morphology—the serpentine, amphibole, and zeolite mineral groups. We also outline some of the information available on clays, chlorites, silica, and other species to illustrate the compositional range of naturally occurring silicate fibers. The most important of these groups is the serpentine mineral group, because it includes the fibrous mineral species chrysotile, which is the most common fibrous mineral and the one most widely mined, processed, and manufactured as asbestos.
1C). Other single-chain silicate species, given different names, exhibit similar regular chains with distinct repeat patterns and cation associations. For example, wollastonite, has a single chain characterized by a 3-tetrahedral repeat unit (Fig. 1D), and rhodonite has a 5-tetrahedral repeat unit (Fig. 2. 1E). The habit of these minerals is often described as acicular. " 22 ASBESTOS AND OTHER FIBROUS MATERIALS Fig. 1 Configurations of the tetrahedral units and chain, double chain, and sheet structures in the silicate and aluminosilicate minerals.