Atomistry » Barium » Chemical Properties » Barium Vanadates
Atomistry »
  Barium »
    Chemical Properties »
      Barium Vanadates »

Barium Vanadates

Barium orthovanadate cannot be separated because on formation it splits up immediately into barium hydroxide and pyrovanadate. Barium pyrovanadate, Ba2V2O7, is obtained by the precipitation of barium chloride by sodium ortho- or pyro-vanadate. It is slightly soluble in water.

Barium metavanadate, BaV2O6, is obtained in the form of yellowish transparent crystals, slightly soluble in water, by heating sodium and barium bromide with vanadic acid, or in colourless transparent prisms, insoluble in water, by adding barium nitrate in excess to a boiling solution of ammonium vanadate. A monohydrate, BaV2O6.H2O, is formed as a flocculent, yellowish-white precipitate by the action of the normal potassium or ammonium salt on barium chloride solution. On long standing, or on drying, it becomes crystalline. It loses practically all its water at 180°-200° C. After fusion it solidifies to a brownish-yellow glass.

Certain acid salts are known, 2BaO.3V2O5.14H2O, obtained in orange-red, transparent, rhombic crystals by the action of a boiling solution of ammonium vanadate on excess of barium nitrate in the presence of acetic acid, and 3BaO.5V2O5.19H2O.

Halogen compounds corresponding to the apatites and wagnerites have been obtained.

Barium fluoroxyvanadate, BaF2.VO2F, is formed as a heavy, bright yellow, insoluble powder by precipitating barium fluoride with potassium fluoroxy vanadate.

Last articles

Xe in 6AYK
Xe in 6QII
Xe in 6ASM
Xe in 5NSW
Xe in 6FY9
Xe in 5O1K
Xe in 5O27
Xe in 5M69
Xe in 5KPU
Xe in 5I63
© Copyright 2008-2020 by atomistry.com
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy