Gadolinium
Gadolinium, shown by Gd, a silvery-white metallic factor with
an atomic variety of 64.
Gadolinium is
likely one of the uncommon earth components within
the lanthanide collection of
the periodic desk (see Periodic Regulation). It's named
after the mineral gadolinite, by
which the factor was
first detected. Gadolinite in flip was
named for Finnish chemist John Gadolin.
Gadolinium happens with different uncommon earth components in
lots of minerals, comparable
to monazite, samarskite, gadolinite, and
a few kinds
of Norwegian ytterspar. It's the 41st factor so
as of abundance in Earth’s crust. Gadolinium melts at about 1313°C (about
2395°F), boils at about 3273°C (about 5923°F), and has a
selected gravity of seven.9. The
atomic weight of the factor is
157.25.
Gadolinium oxide was first separated from different uncommon earth components by
the Swiss chemist Jean de Marignac in 1880. The oxide and
plenty of salts of gadolinium have been ready.
Gadolinium oxide is white and the salts are colourless.
As a result of gadolinium has the
biggest identified cross-part, or stopping energy,
for neutrons of any factor, it's used as a part of management rods in nuclear reactors (see Nuclear Power). Like the
opposite uncommon earth components, it's utilized in digital apparatuses comparable
to capacitors and masers; in metallic alloys;
in high-temperature furnaces; and in apparatuses for magnetic cooling.
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