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Pr141

Pr141, also written as Pr-141, designates the stable isotope of the element praseodymium with mass number 141. Praseodymium (chemical symbol Pr) has atomic number 59, so Pr-141 contains 59 protons and 82 neutrons. It is the only stable, naturally occurring isotope of praseodymium, and as a result the atomic weight of natural praseodymium is essentially the mass of Pr-141, about 140.90766 atomic mass units.

Natural occurrence and stability: Pr-141 occurs in trace amounts within minerals that contain rare earth elements,

Applications and relevance: In analytical chemistry and geochemistry, Pr-141 serves as a reference isotope for calibration

See also: Praseodymium, isotopes, isotopic abundance, rare earth elements.

such
as
monazite
and
bastnäsite.
Because
it
is
stable,
Pr-141
does
not
undergo
radioactive
decay
and
has
no
measurable
half-life
under
normal
conditions.
Its
stability
makes
it
a
reference
point
for
isotopic
studies
of
praseodymium
in
geochemistry
and
materials
science.
and
for
isotopic
ratio
measurements
of
rare
earth
elements.
The
isotope’s
stability
also
makes
it
a
baseline
in
investigations
of
natural
abundance
patterns
and
fractionation
processes
in
accessory
minerals.
In
broader
materials
research,
the
chemical
behavior
of
praseodymium
as
an
element—rather
than
specific
attributes
of
Pr-141—is
often
the
focus,
particularly
in
magnets,
ceramics,
and
glass
coloration,
with
Pr
behaving
similarly
to
other
trivalent
lanthanides.