Cadmium sulfate CdSO

CADMIUM SULFATE. CdSO. Alloys 3003 and 5154 were resistant to solid cadmium sulfate in laboratory tests conducted under conditions of 100% relative humidity at ambient temperature. In other laboratory tests, aqueous solution (1-15%) caused mild attack of 3003 alk at ambient temperature. Aluminum alloy piping, filter press plates, and tanks have been used to handle cadmium sulfate. See also Ref (3) p. 80. (7)p. 45. 

The supersaturation is too low in all experiments to be measured accurately, but it seems reasonable to assume that the effect of residence time is imposed through the kinetics. Another observation is that the D-value for cadmium uptake in anhydrite is about ten times higher than in HH or DH. An explanation for this higher D seems to be related to the crystal structures of the calcium sulfates. Only the AH structure matches with an anhydrous CdSO phase, while no hemi- or dihydrate phase of CdS04 exists. 

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