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<p>[QUOTE=&quot;AWORDCREATED, post: 1817480, member: 52245&quot;]from <a href="http://en.wikipedia.org/wiki/Gold%28III%29_oxide" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://en.wikipedia.org/wiki/Gold%28III%29_oxide" rel="nofollow">http://en.wikipedia.org/wiki/Gold(III)_oxide</a></p><p><br /></p><p>&quot;Gold(III) oxide (Au2O3) is the most stable oxide of gold. It is a red-brown, thermally unstable solid that decomposes at 160 °C.[2] The hydrated form is weakly acidic and dissolves in concentrated alkali to form salts that are believed to contain the Au(OH)4− ion.[2]</p><p><br /></p><p>Anhydrous Au2O3 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.[3]</p><p><br /></p><p>Gold oxide is used to make highly-valued red-coloured or cranberry glass, which, like colloidal gold suspensions, contains evenly-sized spherical gold nanoparticles.&quot;[/QUOTE]</p><p><br /></p>

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