Rhodium(IV) oxide (or rhodium dioxide) is the
chemical compound
A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) containing atoms from more than one chemical element held together by chemical bonds. A molecule consisting of atoms of only one element ...
with the formula
Rh O2.
Chemical properties
RhO
2 is highly insoluble even in hot
aqua regia.
Structure
RhO
2 has the
tetragonal
In crystallography, the tetragonal crystal system is one of the 7 crystal systems. Tetragonal crystal lattices result from stretching a cubic lattice along one of its lattice vectors, so that the cube becomes a rectangular prism with a squar ...
rutile
Rutile is an oxide mineral composed of titanium dioxide (TiO2), the most common natural form of TiO2. Rarer polymorphs of TiO2 are known, including anatase, akaogiite, and brookite.
Rutile has one of the highest refractive indices at visib ...
structure.
Physical properties
RhO
2 has metallic resistivity with values <10
−4 Ohm·cm. It transforms in air to
Rh2O3 at 850 °C and then to metal and oxygen at 1050 °C.
[
]
See also
* Rhodium
Rhodium is a chemical element with the symbol Rh and atomic number 45. It is a very rare, silvery-white, hard, corrosion-resistant transition metal. It is a noble metal and a member of the platinum group. It has only one naturally occurring i ...
References
Transition metal oxides
Rhodium compounds
{{inorganic-compound-stub