Gold trioxide, Gold sesquioxide, Auric oxide
3D model (JSmol)
CompTox Dashboard (EPA)
|Density||11.34 g/cm3 at 20 °C|
|Melting point||298 °C (568 °F; 571 K)|
|insoluble in water, soluble in hydrochloric and nitric acid|
|Fdd2, No. 43|
|NFPA 704 (fire diamond)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
(what is ?)
Gold(III) oxide (Au2O3) is an inorganic compound of gold and oxygen with the formula Au2O3. It is a red-brown solid that decomposes at 298 °C.
According to X-ray crystallography, Au2O3 features square planar gold centers with both 2- and 3-coordinated oxides. The four Au-O bond distances range from 193 to 207 picometers. The crystals can be prepared by heating amorphous hydrated gold(III) oxide with perchloric acid and an alkali metal perchlorate in a sealed quartz tube at a temperature of around 250 °C and a pressure of around 30 MPa.