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Iridium is a
chemical element; it has the
symbol Ir and
atomic number 77. This very hard, brittle, silvery-white
transition metal of the
platinum group...
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Iridium Communications Inc. (formerly
Iridium Satellite LLC) is a
publicly traded American company headquartered in McLean, Virginia,
United States. Iridium...
- The
Iridium satellite constellation provides L band
voice and data
information coverage to
satellite phones,
satellite messenger communication devices...
- Look up
Iridium or
iridium in Wiktionary, the free dictionary.
Iridium is a
chemical element with
symbol Ir and
atomic number 77.
Iridium may also refer...
- been
carried out to
confirm that it
behaves as the
heavier homologue to
iridium in
group 9 as the
seventh member of the 6d
series of
transition metals...
- a
review of
morphologic correlates and of some
conditions that
affect iridial pigmentation throughout life".
Survey of Ophthalmology. 41 (Suppl 2): S117–23...
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There are two
natural isotopes of
iridium (77Ir), and 37 radioisotopes, the most
stable radioisotope being 192Ir with a half-life of 73.83 days, and many...
- than
positive magnitudes, i.e. the
scale is
reverse logarithmic . The
Iridium constellation was one of the
first anthropogenic sources of near-space...
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Iridium-192 (symbol 192Ir) is a
radioactive isotope of
iridium, with a half-life of 73.827 days. It
decays by
emitting beta (β)
particles and
gamma (γ)...
- a
density of 22.59 g/cm3.
Manufacturers use its
alloys with platinum,
iridium, and
other platinum-group
metals to make
fountain pen nib tipping, electrical...
