Severe bronchitis or pneumonia can occur 1 to 2 days after high exposure, with fever, cough and shortness of breath.
Death can occur.
High or repeated low exposures can lead to scars in the lungs and other organs. Fatigue, weight loss, shortness of breath, lung damage and heart failure can occur years later. Particles under cuts in the skin may cause ulcers. Allergic skin rash may occur. It is used in the manufacture of ceramics, glass, electron tubes, electronics components, nuclear fuels and nuclear moderators.