Thorium Dioxide
978-613-1-05396-2
6131053960
68
2010-07-27
29.00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The compound is radioactive due to the radioactivity of thorium. Thorium dioxide can be used as a nuclear fuel. The high thermal stability of thorium dioxide allows applications in flame spraying and high temperature ceramics. Thorium dioxide was the primary ingredient in the X-ray contrast medium Thorotrast. Use of Thorotrast was abandoned when it was found to be a carcinogen, sometimes causing cholangiocarcinoma. Today, barium sulfate is the standard X-ray contrast agent. Thoria has the fluorite crystal structure. Few other binary dioxides have this structure: uranium dioxide, hafnium dioxide and cerium dioxide, not to mention plutonium dioxide. The band gap of thoria is about 6 eV.
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