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Additional
osmium
English Wikipedia - The Free Encyclopedia
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Osmium
Osmium
(from
Greek
osme
(ὀσμή) meaning "smell") is a
chemical element
with symbol
Os
and
atomic number
76. It is a hard, brittle, bluish-white
transition metal
in the
platinum group
that is found as a
trace element
in alloys, mostly in
platinum
ores. Osmium is the densest naturally occurring element, with a
density
of . Its
alloys
with platinum,
iridium
, and other platinum group metals are employed in
fountain pen
nibs
,
electrical contacts
, and other applications where extreme durability and
hardness
are needed.
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