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Tantalum Peroxyfluorides

Tantalum Peroxyfluorides or Fluoroxypertantalates. - The alkali tantalum oxyfluorides also have the property of taking up oxygen by reaction with hydrogen peroxide.

When potassium tantalum fluoride is dissolved in 4 per cent, hydrogen peroxide solution which contains a small amount of hydrofluoric acid, crystals of potassium tantalum peroxyfluoride, 2KF.TaO2F3.H2O, are obtained. This is a remarkably stable substance; it loses water at 100° C. and oxygen only at higher temperatures. With concentrated hydrofluoric acid it yields hydrogen peroxide. The corresponding rubidium salt, 2RbF.TaO2F3.H2O, is prepared similarly.

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