Asbestos and Other Fibrous Materials: Mineralogy, Crystal by H. Catherine W. Skinner

By H. Catherine W. Skinner

This entire sourcebook describes the chemical, actual, and mineralogical features of fibrous inorganic fabrics, either artificial and of course taking place. A common description of the fibrous nation, the variety of compounds which can undertake this kind, and an outline of the features specified to such fabrics shape the spine of the booklet . The authors additionally investigate the applying and use of asbestos and different fibrous fabrics in and assessment their power as future health risks. the knowledge accumulated right here may be hugely priceless to clinical investigators and attorneys concerned about environmental health.

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Extra resources for Asbestos and Other Fibrous Materials: Mineralogy, Crystal Chemistry, and Health Effects

Example text

Supergroups: The Biopyriboles Similarities of composition, polymerized species, and crystal structures have been noted in several aluminosilicate mineral groups. Thompson (1978) suggests that although the mica, pyroxene, and amphibole mineral groups, are characterized by distinct aluminosilicate chemistries and crystal structures, they are related. Each group also has distinct polymerized species. The pyroxene species are single chains, the amphiboles are cross-linked double chains, and the micas are cross-linked aluminosilica sheets.

1F is common and typical of the amphiboles, a mineral group of special interest because five amphiboles have been mined as asbestos. When three of the oxygens in the tetrahedra are shared (Si: O ratio = 2:5), the complex ions that form take on a sheetlike configuration. The sheets can be stacked, and the associated cations are found between the sheets. Micas and clays are sheet-structure minerals with distinctive habits and physical properties, that reflect the planar silicate sheet structure (Fig.

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. Such variations do not necessarily change the composition but would create the opportunity for different threedimensional structures. Two minerals with the same chemical composition but different crystal structures are polymorphs. The mineral world contains many examples of polymorphism.

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