Sodium metavanadate

White solid

2.85 g · cm -3

630 ° C.

Soluble in water ( 210 g · l-1 at 25 ° C)

Risk

98 mg · kg -1 ( LD50, rat, oral)

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Sodium metavanadate is a chemical compound of sodium with vanadium and oxygen from the group of vanadates.

Occurrence

Sodium metavanadate occurs naturally in the mineral Metamunirit.

Production and representation

Sodium metavanadate may be prepared by reaction of sodium hydroxide with vanadium ( V) oxide.

Properties

Sodium metavanadate occurs in two different crystal structures (alpha and beta). In this case, at room temperature, the orthorhombic structure is more stable β, while at higher temperatures there is the monoclinic α - phase. In addition, a dihydrate is known, this crystallized from below 307.75 K from aqueous solution, goes to the air but quickly under water of crystallization in β - sodium metavanadate on.

Use

Sodium metavanadate is color glass and ceramics is used as intermediate in the recovery of vanadium from the corresponding ores, as well as a component of corrosion inhibitors, as a catalyst and in the.