A NEW ACID SELENITE - MG(HSEO3)(2)

Magnesium bis[hydrogentrioxoselenate(IV)] crystallizes in a new struct ure type with Mg2+ and hydrogen-bonded dimers of trigonal pyramidal Se O2OH- ions in an NaCl-like arrangement forming MgO6 octahedra linked v ia O-Se-O bends to create a three-dimensional network structure. The M g-O and Se-O distances reflect the bonding schemes of the correspondin g atoms. The hydrogen bonds in the (SeO2OH-)(2) dimers are strong, wit h d(OH .. O) = 2.616(2) Angstrom. They are joined through Se and Mg at oms to form layered hydrogen-bond systems parallel to (100).