Atomistry » Tungsten » Compounds » Sodium tungsten bronzes
Atomistry »
  Tungsten »
    Compounds »
      Sodium tungsten bronzes »

Sodium tungsten bronzes

Sodium tungsten bronzes have been the subject of much investigation and many have been described. The following appear to be well-defined compounds: Na2W2O6. golden-yellow cubic crystals, density 7.28; Na2W3O9, reddish-purple octahedra, density 7.22; Na2W4O12, violet needles, density 7.195; Na2W5O15, blue cubic crystals; Na4W5O15, reddish-yellow crystals; and Na5W6O18, yellow cubes.

Engels has described a series of bronzes containing an alkali and an alkaline earth metal. These were prepared by electrolysis of the mass obtained by fusing commercial sodium or potassium tungstate with the calculated amount of metal carbonate.

2BaW4O12.3Na2W5O15, dark blue crystals.
BaW4O12.5Na2W3O9, yellow-red cubes.
BaW4O12.5K2W4O12, dark red pyramids.
SrW4O12.5Na2 W5O15, brilliant violet pyramids.
SrW4O12.12Na2W3O9, carmin-red pyramids.
SrW4O12.5K2W4O12, red pyramids.
CaW4O12.5Na2W5O15, violet pyramids.
CaW4O12.10Na2W3O9, purple cubes or pyramids.
CaW4O12.5K2W4O12, glistening red pyramids.

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
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy