Silver orthovanadate

Determination of vanadium as silver vanadate Discussion. Vanadates are precipitated by excess of silver nitrate solution in the presence of sodium acetate after boiling, the precipitate consists of silver orthovanadate. The following reactions occur with a solution of a metavanadate ... 

It has been stated that the results obtained by precipitation of vanadate as silver orthovanadate Ag3V04 are not altogether satisfactory. Better results are obtained by precipitation at pH 4.5 as silver metavanadate AgV03 the precipitate is weighed after drying at 100-105 °C. 

Silver orthovanadate reacts with alkyl halides to give esters of vanadic acid. These are yellow liquids of general formula Alk.3V04, in which Aik. represents the alkyl radical. Esters of orthovanadic acid axe more stable than those of pyro- and meta-vanadic acids that is, the order of stability is the reverse of that which applies to the inorganic salts.3 The following orthovanadates have been prepared —... 

Silver Ortliovanadate, Ag3V04, is precipitated as a deep orange powder when a freshly prepared solution of sodium orthovanadate is treated with a carefully neutralised solution of silver nitrate. It melts between 408° and 565° C.,7 and is soluble in nitric acid and in ammonium hydroxide the latter solution yields yellow hexagonal crystals of the composition 3AgV03.2NH3.H20.8... 

Clusters of three phosphors are used for each dot in a color television or computer display screen. Commonly used phosphors for this purpose are europium-activated yttrium orthovanadate, YVO4, for the red color, silver-activated zinc sulfide for blue, and copper-activated zinc sulfide for green. 

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