|Origin of Name
||From the Latin word iridis, meaning rainbow
|Date and Place of Discovery
||In 1804 in London, England
- It is occurs in natural alloys with platinum or osmium.
- It is the most resistive to corrosion - it cannot be attacked by acids or
aqua regia - but can be attacked by molten salts
such as NaCl or NaCN.
- It is very brittle making it difficult to work with.
- It is only a little less dense than osmium, the most dense element.
- High strength alloys that can withstand high temperatures
- Electrical contacts
- Hardening agent for platinum
- Compass bearings
- LED technology
- Radiation therapy to treat prostate and other cancers
- Spark plus for internal combustion engines
- Fountain pen nibs