Crystal structure of Na4(As2O5)(H2O)0.5 and a survey of the pyroarsenite anion, (As2O5)4
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The title compound, tetra-sodium pyroarsenite hemihydrate, [Na4(As2O5)(H2O)0.5], represents the first pyroarsenite compound of an alkali metal. The asymmetric unit comprises four Na, two As, five O sites and one H site in a general position, and one water O at... ...
