Lastly, in 1891, Seubert completed his work by redetermining the atomic weight of osmium with a specimen of the metal of practically perfect purity, with the result that the old number ...

You can buy these alternative precious metals in physical quantities, as part of stock from a precious metal company or even ... rhodium, osmium and iridium. All metals in this group are rare ...

Store pure osmium tetroxide and its concentrated solutions in appropriate, sealed glass containers within unbreakable secondary containment (i.e., a bottle or vial within a sealed compatible plastic ...