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Terbium is a metallic chemical element which is classified in the
rare earth elements, also known as lanthanides, of the periodic
table of elements.
China is the source of much of the world's terbium. Like other rare
earth elements, terbium is comparatively well distributed across the
Earth, but it is not widely used; most consumers do not interact
with terbium, although they may own some products with terbium
It is not found in a pure form in nature, but it can be recovered
from an assortment of minerals.
Terbium is isolated, it is silvery gray and relatively soft and easy
the periodic table of elements, terbium is identified with the
symbol Tb, and its atomic number is 65. The element also has a
number of isotopes and salts which are used in various applications.
The element has a crystalline structure, and at least two allotropic
forms, meaning the structure of the element can vary when it is in a
solid state, depending on the circumstances.
is used in X-ray machines as well as a green phosphor activator in
color television tubes. It is also used along with the element
zirconium and works as a crystal stabilizer in fuel cells that are
supposed to work at high temperatures. Terbium green phosphor is
used in combination with divalent europium blue phosphors and
trivalent europium red phosphors. This helps in creation of
'trichromatic' lighting technology that has a higher light output
compared to incandescent lighting.
is also used in alloys, electronic devices and magneto mechanical
terbium-iron alloy is used to provide metallic films for
magneto-optic recording of data.
The most common uses include as a laser material that emits coherent
light at 5460Â. It is also used as a dopant for calcium fluoride,
calcium tungstate and strontium molybdate that are used in solid
state devices. It is also used as a probe in biochemistry as it
resembles calcium in behavior. It gives out fluorescence that helps
in tracking the element in biochemical experiments.
Terbium is used as a Dopant in calcium fluoride, calcium tungstate
and strontium molybdate, materials that are used in solid-state
devices, and as a crystal stabilizer of fuel cells which operate at
elevated temperatures, together with ZrO2.
Terbium oxide is used in green phosphors in fluorescent lamps and
color TV tubes. Sodium terbium borate is used in solid state
devices. The brilliant fluorescence allows terbium to be used as a
probe in biochemistry. The brilliant fluorescence allows terbium to
be used as a probe in biochemistry.
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