Atomistry » Uranium » Compounds » Uranyl Arsenates
Atomistry »
  Uranium »
    Compounds »
      Uranyl Arsenates »

Uranyl Arsenates

The orthoar senate, (UO2)3(AsO4)2.12H2O, occurs in nature as trogerite. It is yellow in colour, but on heating turns reddish brown with loss of water; on cooling, the product again becomes yellow. It breaks down when heated with water, yielding micaceous leaflets. The compound has been produced artificially. Uranyl hydrogen arsenate, UO2HAsO4.4H2O, is obtained as a pale yellow powder by the addition of uranyl acetate to a solution of arsenic acid or sodium arsenate. It is insoluble in water and acetic acid.

Uranyl dihydrogen arsenate, UO2(H2AsO4)2.3H2O, separates in small yellow crystals when a solution of uranyl acetate or nitrate containing an excess of arsenic acid is concentrated. The crystals lose their water of crystallisation at 150° C.

Uranyl pyroarsenate, (UO2)2As2O7, remains as a yellow powder when the arsenate, UO2HAsO4.4H2O, or ammonium uranyl arsenate (see below), is heated.

Last articles

Zn in 8WB0
Zn in 8WAX
Zn in 8WAU
Zn in 8WAZ
Zn in 8WAY
Zn in 8WAV
Zn in 8WAW
Zn in 8WAT
Zn in 8W7M
Zn in 8WD3
© Copyright 2008-2020 by atomistry.com
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy