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     76    

76 Os Osmium

Transition metal, mass: 190.23 u, 6 stable isotopes (184, 187, 188, 189, 190, 192), abundance rank (earth/space): 74/55

Click image to magnify. Pure osmium bead, about 4 grams. Original size in cm: 0.6 x 0.7
Osmium Osmium bead
The blue platinum group metal osmium is at normal conditions the most heavy element. It is very hard, rare and expensive. So it is only used, when something very durable and small is needed, like sometimes for the ball in good ballpoint pens (in an alloy together with iridium). Its oxide OsO4, which is extremely toxic, has some use as staining agent in microscopy.

Osmium, brighter image
Same piece, brighter image.


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The images are licensed under a Creative Commons Attribution 3.0 Unported License, unless otherwise noted. Attribution by linking (outside of the internet credit with url) to the according element page.



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