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CaTeO3

CaTeO3, or calcium tellurite, is an inorganic oxide composed of calcium, tellurium in the +4 oxidation state, and oxide ions in a 1:1:3 ratio. It belongs to the family of calcium tellurites and is typically encountered as a solid material, often in powdered form, used mainly in research and materials science contexts.

Crystal structure and polymorphism

CaTeO3 has been reported to crystallize in several polymorphic forms, with room-temperature structures described as orthorhombic

Synthesis

CaTeO3 is prepared by high-temperature solid-state reactions. Common routes involve mixing calcium-containing precursors such as CaCO3

Properties

The compound is a relatively stable ceramic oxide at ambient conditions and is generally insoluble in water.

Applications

CaTeO3 is mainly of interest as a material for fundamental studies of tellurite chemistry and as a

See also

Tellurites; calcium oxide; tellurium oxides.

or
monoclinic
in
different
studies.
The
exact
structure
can
depend
on
synthesis
conditions,
purity
of
starting
materials,
and
atmospheric
environment,
leading
to
variations
in
the
arrangement
of
TeO3
units
within
the
oxide
lattice.
or
CaO
with
tellurium
oxides
(TeO2
or
TeO3)
and
calcining
the
mixture
at
elevated
temperatures
(often
in
the
range
of
700–900
°C)
in
air
or
controlled
atmospheres,
typically
with
the
evolution
of
CO2
as
a
byproduct.
It
exhibits
properties
characteristic
of
tellurite
oxides,
including
insulating
behavior
and
a
high
melting
point,
with
physical
properties
that
are
influenced
by
the
precise
crystal
structure
and
level
of
chemical
purity.
precursor
in
the
synthesis
of
other
tellurium-containing
materials.
It
is
not
widely
used
as
a
bulk
commercial
material,
but
it
serves
as
a
reference
compound
in
inorganic
synthesis
and
materials
research.