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Definition of cerium
Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of cerium is as below...
Cerium
(n.) A rare
metallic
element,
occurring
in the
minerals
cerite,
allanite,
monazite,
etc.
Symbol
Ce.
Atomic
weight
141.5.
It
resembles
iron in color and
luster,
but is soft, and both
malleable
and
ductile.
It
tarnishes
readily
in the air..
Lern More About Cerium
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Gadolinite
::
Gadolinite
(n.) A
mineral
of a
nearly
black color and
vitreous
luster,
and
consisting
principally
of the
silicates
of
yttrium,
cerium,
and
iron..
Cerite
::
Cerite
(n.) A
mineral
of a
brownish
of
cherry-red
color,
commonly
massive.
It is a
hydrous
silicate
of
cerium
and
allied
metals..
Fergusonite
::
Fergusonite
(n.) A
mineral
of a
brownish
black
color,
essentially
a
tantalo-niobate
of
yttrium,
erbium,
and
cerium;
-- so
called
after
Robert
Ferguson..
Tysonite
::
Tysonite
(n.) A
fluoride
of the
cerium
metals
occurring
in
hexagonal
crystals
of a pale
yellow
color.
Cf.
Fluocerite.
Allanite
::
Allanite
(n.) A
silicate
containing
a large
amount
of
cerium.
It is
usually
black in
color,
opaque,
and is
related
to
epidote
in form and
composition..
Pyrochlore
::
Pyrochlore
(n.) A
niobate
of
calcium,
cerium,
and other
bases,
occurring
usually
in
octahedrons
of a
yellowish
or
brownish
color and
resinous
luster;
-- so
called
from its
becoming
grass-green
on being
subjected
to heat under the
blowpipe..
Didymium
::
Didymium
(n.) A rare
metallic
substance
usually
associated
with the metal
cerium;
-- hence its name. It was
formerly
supposed
to be an
element,
but has since been found to
consist
of two
simpler
elementary
substances,
neodymium
and
praseodymium.
See
Neodymium,
and
Praseodymium..
Decipium
::
Decipium
(n.) A
supposed
rare
element,
said to be
associated
with
cerium,
yttrium,
etc., in the
mineral
samarskite,
and more
recently
called
samarium.
Symbol
Dp. See
Samarium..
Monazite
::
Monazite
(n.) A
mineral
occurring
usually
in small
isolated
crystals,
-- a
phosphate
of the
cerium
metals..
Lanthanum
::
Lanthanum
(n.) A rare
element
of the group of the earth
metals,
allied
to
aluminium.
It
occurs
in
certain
rare
minerals,
as
cerite,
gadolinite,
orthite,
etc., and was so named from the
difficulty
of
separating
it from
cerium,
didymium,
and other rare
elements
with which it is
usually
associated.
Atomic
weight
138.5.
Symbol
La..
Fluocerite
::
Fluocerite
(n.) A
fluoride
of
cerium,
occuring
near
Fahlun
in
Sweden.
Tynosite,
from
Colorado,
is
probably
the same
mineral..
Samarskite
::
Samarskite
(a.) A rare
mineral
having
a
velvet-black
color and
submetallic
luster.
It is a
niobate
of
uranium,
iron, and the
yttrium
and
cerium
metals..
Eschynite
::
Eschynite
(n.) A rare
mineral,
containing
chiefly
niobium,
titanium,
thorium,
and
cerium.
It was so
called
by
Berzelius
on
account
of the
inability
of
chemical
science,
at the time of its
discovery,
to
separate
some of its
constituents..
Yttro-cerite
::
Yttro-cerite
(n.) A
mineral
of a
violet-blue
color,
inclining
to gray and
white.
It is a
hydrous
fluoride
of
cerium,
yttrium,
and
calcium..
Cerium
::
Cerium
(n.) A rare
metallic
element,
occurring
in the
minerals
cerite,
allanite,
monazite,
etc.
Symbol
Ce.
Atomic
weight
141.5.
It
resembles
iron in color and
luster,
but is soft, and both
malleable
and
ductile.
It
tarnishes
readily
in the air..
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