When it comes to elements we meet in everyday life, osmium doesn’t come high on the list. Let’s face it, a metal that is best-known for being used in an alloy in fountain pen tips isn’t exactly the substance-de-jour. Yet its compound with oxygen, osmium tetraoxide, is both versatile and surprising.
Discover more in my latest Royal Society of Chemistry podcast about osmium tetraoxide. Take a listen by clicking play on the bar at the top of the page - or if that doesn't work for you, pop over to its page on the RSC site.