Periodic table

Periodic table

Osmium is a chemical element with the element symbol Os and the atomic number 76. In the periodic table of the elements it is in the 8th group, the iron group. It is a hard, brittle, steel-blue transition metal and belongs to the platinum metals.

Osmium has the highest compression modulus of all elements with 462 GPa, only surpassed by aggregated diamond nanorods, and the highest density with 22.61 g/cm3.

Osmium completes the precious metals in the subgroup elements. It's the last of its kind.



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Periodic table