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Today's Terms
Mesothelioma
Definition:
A rare malignant tumor of the lung membrane which lines the chest and abdominal cavity. Malignant mesothelioma is a cancerous tumor of the pleura (lining of the lung and chest cavity) or peritoneum (lining of the abdomen) that is almost always caused by sustained exposure to asbestos.
Tremolite
Definition:
Tremolite may occur in fibrous form (an asbestos). It is not used commercially in the United States, but is a common impurity in chrysotile asbestos and vermiculite mined from deposits in Libby, Montana.
Actinolite
Definition:
Actinolite is the intermediate member; when iron is predominant the
mineral is ferro-actinolite and when magnesium is predominant, the mineral is tremolite. The iron
produces a green color that darkens as the iron content increases. Actinolite may occur in fibrous form (an
asbestos). It is not used commercially, but is a common impurity in chrysotile asbestos.
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