Osmium Oxide
Osmium oxide may refer to: *Osmium dioxide, OsO2 *Osmium tetroxide, OsO4 {{Short pages monitor ...
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Osmium Dioxide
Osmium dioxide is an inorganic compound with the formula . It exists as brown to black crystalline powder, but single crystals are golden and exhibit metallic conductivity. The compound crystallizes in the rutile structural motif, i.e. the connectivity is very similar to that in the mineral rutile. Preparation can be obtained by the reaction of osmium with a variety of oxidizing agents, including, sodium chlorate, osmium tetroxide, and nitric oxide at about 600 °C. Using chemical transport, one can obtain large crystals of , sized up to 7x5x3 mm3. Single crystals show metallic resistivity of ~15 μΩ cm. A typical transport agent is via the reversible formation of volatile : : It can also be prepared by reduction of an osmate or the tetroxide with alcohol, or by reacting various tetravalent osmium compounds with strong alkali. Reactions Osmium dioxide does not dissolve in water, but it can be dissolved by strong acids such as hydrochloric acid. The crystals have rutil ...
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