Beryllium selenites

Ripan and Vericeanu [68R1P/VER] studied the solubility of beiyllium selenite (Be8e03-2H20 ) by conductivity measurements as described in Appendix A. The Be ion forms strong hydroxo complexes. A calculation based on the assumptions made in the Appendix together with the total concentration, mean value 1.0 x 10 M, in the paper leads to the conclusion that the major part of Be(II) would be present as hydroxo complexes at equilibrium. Hence no solubility product can be calculated from the data in [68R1P/VER]. 

No other experimental studies associated with thermodynamic data of beryllium selenites have been found. 

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Beryllium has very little tendency to form acid salts and only an acid oxalate, an acid molybdate, an acid phosphate, an acid arsenate and four acid selenites have place in chemical literature. The first has been shown to be a simple mixture of the normal oxalate and oxalic acid, and tlie molybdate and selenites were little more than the residues left on evaporating the constituents with little of detail in their study. The phosphate was non-crystalline. These salts need confirmation although from the well known tendencies of phosphoric acid, the existence of an acid phosphate would seem as probable as any acid salt of beryllium. 

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