Cummingtonite-asbestos

Cummingtonite-asbestos The type of amphibole-asbestos composed of the mineral cummingtonite. 

Intermediate members of the series that contain both Mg and Fe, may be identified as iron-rich cummingtonite, for example. Alternatively, a fibrous species whose composition and structure resembles grunerite occurs in South Africa. It is mined as asbestos and known commercially as amosite. Amosite is a varietal mineral name that has been used in the trade to describe mineral materials within the cummingtonite-grunerite series. The name is an acronym for asbestos mines of South Africa. Because it is not a proper mineral name, it may not be found in lists of minerals in standard miner-alogical texts. 

Amosite A commercial term for a type of amphibole-asbestos from South Africa consisting chiefly of fibrous members of the cummingtonite-grunerite series. Variable amounts of several fibrous members of the amphibole group and other minerals may be included in a particular sample. The name is an acronym derived from asbestos mines of 5outh Africa. 

Synonyms No data Mysorite, brown asbestos fibrous cummingtonite/ grunerite Serpentine asbestos white asbestos Silicic acid calcium magnesium salt (8 4) No data Ferroantho- phyllite azbolen asbestos Blue asbestos... 

TSCA, 40CFR716.120.c6 asbestos-asbestiform varieties of chrysolite (serpentine) crocidolite (riebeckite) amosite TSCA, (cummingtonite-grunerte) anthophyllite tremolite and actino- T120-C6... 

Synonyms/Trade Names Actinolite, Aotinolite asbestos, Amosite (cummingtonite-grunerite), Anthophyllite, Anthophyllite asbestos, Chrysotile, Crocidolite (Riebeckite), Tremolite, Tremolite asbestos ... 

Grunerite or cummingtonite-grunerite, including grunerite asbestos known as amosite (12172-73-5) syn. mysorite. 

Chemical modifications by derivitizing the surfaces of mineral fiber silicates have revealed alterations in reactivity in in vitro cell toxicity studies, suggesting a multifactorial character of particle/cell interactions [171]. In addition, the adsorption of bovine serum albumin onto asbestos fibers has been shown by infrared spectroscopy and NMR to be mediated by O—H—N hydrogen bonds [172]. In view of the various hypotheses put forward in the bulk biochemical studies and the apparent surface-oriented origins of these reactions, it is important to examine the features of the silicate/cell interfaces and surfaces. Herein we present a typical case of the interaction between a related alumino-silicate (i.e., cummingtonite) and bioorganic cell interaction. 

Amphibole A famiiy of minerals whose crystals are formed by long, thin units which have two thin ribbons of double chain siiicate with a brucite ribbon in between. The shape of each unit is simiiar to an I beam . Minerals important in asbestos anaiysis inciude cummingtonite-grun-erite, crocidolite, tremoiite-actinolite and anthophyllite. 

Asbestos A term for naturally occurring fibrous miner-ais. Asbestos inciudes chrysotile, cummingtonite-gruner-ite asbestos (amosite), anthophyllite asbestos, tremolite asbestos, crocidoiite, actinolite asbestos and any of these minerals which have been chemically treated or altered. The precise chemicai formulation of each species varies with the location from which it was mined. Nominal compositions are listed ... 

Industrial Talc, Asbestos-free n Industrial talc of which less than two particles per 100 particles are asbestos, where asbestos fiber is defined as being both by a fiber by ASTM D 2946 and one of the asbestiform varieties of serpentine, riebeckite, cummingtonite (which are chrysotile, crocidolite and amosite, respectively), anthopyllite, tremolite, or actinolite. The non-asbestiform varieties of these same materials are not asbestos. 

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