Though not an actual geologic classification, Asbestos is the name associated with six naturally occurring silicate minerals (Chrysotile, amosite, crocidolite, anthophyllite, tremolite, and actinolite). Because of their physical properties to withstand high heat, not conduct electricity, and high tensile strength Asbestos is contained in thousands of products and materials. Asbestos is derived from the Greek word for inextinguishable. Some of the first identified cases of asbestosis actually date back to workers who wove the asbestos fibers into cloth products. The Romans are believed to have clean up after a feast by placing the table cloth into the fire to burn the cloths clean. Though the history of Asbestos use is lengthy, it wasn't until the late 1800's that it really became a popular. It was often used with cement, cloth, drywall compound and many other uses that required strength, resistance to heat, chemicals, electrical and chemical damage. It was also used for wall decoration and sound absorption. Asbestos fibers are known to cause lung cancer, mesothelioma (a malignant cancer in the plural lining of the lung, and asbestosis (scaring of the lung tissue), due the breathing of Asbestos fibers. The fibers' strength, minute size, and thin fibrous crystals (1:20 width to length ratio) allow the fibers to be drawn deep into the lung to the alveolar sac (the point where the blood exchanges carbon dioxide for oxygen). Though many uses of asbestos have been banned (sprayed on fire proofing, acoustical sound proofing, etc.), it is still used in many common products (i.e. brake and clutch lining, floor tile, etc.).
Mesothelioma Information