What does it look like?
What is it?
After gold, Rhodium is the most expensive metal. Most of this expense is driven by the fact that it’s one of the rarest elements found on Earth, only an estimated 0.0002 parts per million (2 × 10−10) of the crust are made of this. But it’s use in catalytic converters has brought about a bigger demand of recent years, hence the price has rocketed. The crystal structure of pure Rhodium is face centred cubic, like gold, and it doesn’t found in many minerals (as it’s both rare and quite unreactive). However, there is this very rare mineral Bowieite – which is a rhodium sulphide (though the rhodium in the natural environment is sometimes substituted for platinum and iridium).
Where did the structure come from?