Gold sesquioxide

Synonyms auric oxide gold trioxide gold oxide gold sesquioxide Physical Properties... 

Gold Trioxide. Auric oxide gold sesquioxide gold oxide. Au203 mol wt 442.00. Au 89.15%, O 10,86%. Prepd from the hydroxide Roseveare, Buchner, J. Am. Chem. Soc. 49, 1221 (1927). 

Gold trioxide gold sesquioxide auric oxide. 

B. C. Dutt and S. N. Sen found that when nitric oxide is passed into a suspension of barium dioxide in water, barium nitrite, not nitrate, is formed. P. Sabatier and J. B. Senderens observed no change when nitric oxide is passed over Cuprous Oxide at 500°. H. A. Auden and G. J. Fowler observed that dry nitric oxide and Silver oxide, at ordinary temp., form silver and silver nitrate P. Sabatier and J. B. Senderens also obtained silver and silver nitrite by passing nitric oxide into water with silver oxide in suspension. C. F. Schonbein found gold oxide is reduced by moist nitric oxide, forming nitrous acid. P. Sabatier and J. B. Senderens found that titanium sesquioxide forms white titanic oxide when heated in an atm. of nitric oxide and that stannous oxide below 500° burns in an atm. of nitric oxide, forming stannic oxide. If nitric oxide be passed into water with lead dioxide in suspension, the water is coloured, and in about 3 hrs., lead nitrite and nitrate are formed, and later, rhombic crystals of a basic nitrite. B. C. Dutt and S. N. Sen said that the nitrate is formed by the action of the dioxide on the nitrite. Lead dioxide is reduced to lead oxide by nitric oxide at 315°, and H. A. Auden and G. J. Fowler found that the reaction begins at 15°, when a basic lead nitrite is... 

When moist hydrated peroxide of iron is mixed with a neutral solution of protochloride of tin, an exchange takes place, and a bulky precipitate of a grey colour is formed, which is a hydrate of sesquioxide of tin. Fe Oj -p 2 SnCl = Sn, 0,-1-2 FeCl. The sesquioxide is soluble in acids and in ammonia, the latter character distinguishing it from the protoxide. Its solution in hydrochloric add forms, with chloride of gold, the purple of Cassius and seems, indeed, better adapted for making it than the protoxide. 

An alternative is the reaction of the respective sesquioxides with (NH4)Hp2, in analogy to the ammonium chloride (bromide) route. In principle, this is a two-step procedure with the formation of a ternary fluoride first and, secondly, its thermal decomposition (see below). When elemental fluorine is available, the direct fluorination of the rare earths or any of their salts is also a possibility. Ternary fluorides are obtained by a solid state reaction of the respective binary components in sealed gold or platinum tubes. 

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