Properties of Iridium-191 Disc:
|Properties of Iridium-191 disc:|| |
|Isotopic Enrichment (%)||>80|
Iridium is a very hard and brittle, silvery metallic transition element. It has a yellowish cast to it. Salts of iridium are highly coloured. It is the most corrosion resistant metal known, not attacked by any acid, but is attacked by molten salts. There are two natural isotopes of iridium, and 4 radioisotopes, the most stable being Iridium-192 with a half-life of 73.83 days. Iriridium-192 decays into Platinum, while the other radioisotopes decay into Osmium (not all). Iridium is used in high temperature apparatus, electrical contacts. Iridium was discovered by Smithson Tennant in England in 1803. The name Iridium comes from the Greek word Iris, which means rainbow. Iridium metal is generally non-toxic due to its relative unreactivity, but iridium compounds should be considered highly toxic.
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