Asbestos Crocidolite

The initial connection between asbestos and mesothelioma was made by Wagner et al. (1960), when all but one patient in a study of mesothelioma-related deaths were found to be miners, workers, members of their families, or others living in the area of South Africa where the amphibole-asbestos crocidolite was mined. A comparable occupational exposure to crocidolite has been documented in Australia, with similar results (Armstrong et al., 1984). Mann and his associates (1966) documented three cases of mesothelioma among fifty-four patients dying of pulmonary asbestosis, and in two of the patients the mesotheliomas were peritoneal rather than pleural. 

SYNS AMORPHOUS CROCIDOLITE ASBESTOS ASBESTOS (ACGIH) BLUE ASBESTOS (DOT) BROWN ASBESTOS (DOT) O CROCIDOLITE ASBESTOS CROCIDOLITE (DOT) FIBROUS CROCIDOUTE ASBESTOS KROKYDOLITH (GERMAN) NCI-C09007... 

A cohort of 4,659 former residents of Wittenoom, Western Australia, who had lived there between 1943 and 1993 for at least 1 month, and were environmentally, but not occupationally, exposed to asbestos (crocidolite), was studied by Hansen et al. (1998). The rate of mesothelioma in the cohort increased... 

Regulatory agencies such as the U.S. Environmental Protection Agency (EPA) and Occupational Safety and Health Administration (OSHA) recognize six asbestos minerals chrysotile, a serpentine mineral and five amphibole minerals, actinolite asbestos, tremolite asbestos, anthophyllite asbestos, crocidolite asbestos, and amosite asbestos. Nonasbestiform amphibole minerals are not included in U.S. health regulations regarding asbestos because there is insufficient evidence that they will produce adverse health effects of the same type and severity produced by chronic exposure to asbestos. 

Muscovite and biotite have very similar compositions. Why is one "white mica" and the other "black mica" In the same vein, talc is white, chrysotile is while asbestos, crocidolite is blue asbestos and amosilc is a gray-bruwm asbestos. 

Actinolite Amosite Anthophyllite Asbestos Asbestos, blue, 9 Asbestos, brown Asbestos, white, 9 Blue asbestos Blue asbestos (crocidolite), 9 Brown asbestos (amosite, mysorite), 9 Chrysotile Crocidolite Mysorite Talcum with tremolite and/or actinolite Tremolite White asbestos White asbestos (chrysotile, actinolite, anthophyllite, tremolite), 9... 

Blue asbestos (crocidolite) n. An iron-rich form of asbestos, fibers of which were long used in reinforced plastics when good chemical resistance was essential. 

Muscovite and bioiite have very siirubr compositions. Why b one "while mka and Ihe other biuck mica In the same vein, lab is white, chrysolite k white asbestos, crocidolite is blue asbestos and amosile b a groy4>rown asbestos. 

Blasfolie (Schlauchfolie) blown film line Blasfohenanlage blow-out pipet Ausblaspipette blowpin Blasdom blowpipe assay/ blowpipe test Lotrohrprobe blowtorch Geblaselampe blue asbestos/crocidolite Blauasbest Krokydolith blue gum... 

Double-chain silicates, shown in Figure I5.13f, find some SiO units sharing two oxygens while others share three. The repeating unit is Si40if. Five double-chain silicates [tremolite, anthophyllite, actinolite, amosite ( brown asbestos ), crocidolite ( blue asbestos ), all members of the amphibole family of minerals] and the serpentine mineral chrysotile ( white asbestos ) are classified under the generic name asbestos. The molecular-level chain structure of these materials is reflected in... 

Modern experience is that all forms of asbestos are equally hazardous, although for different reasons. Previously, attention was focused on blue asbestos (crocidolite), followed by amosite, or brown asbestos. The latter is often a component of tiles. Chrysotile, white asbestos, not only produces asbestosis following even quite modest exposures, but also cancer of the lung. Analysis determines the fibre type or types, which indicates the requirements for protection although this work will be restricted to HSE licence holders. 

The asbestos minerals are crystalline fibrous silicates, some of which have been exploited commercially, especially as an insulating material. These minerals comprise sheets, or chains of silicate tetrahedra in which oxygen is either bound to two silicon atoms or to one silicon atom, and possesses a negative charge. There are two major groups of asbestos mineral serpentines and amphiboles. White asbestos or chrysotile is a serpentine mineral, whereas the other forms of asbestos, crocidolite (blue asbestos), amosite (brown asbestos), anthophyllite, tremolite, and aetinolite, are amphiboles. Tremolite can also be found as a contaminant in other minerals, such as chrysotile, talc, and vermiculite. 

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