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Acta Cryst. (2003). E59, o180-o182 [ doi:10.1107/S1600536803000953 ]
Abstract: In the crystal structure of the title compound, C5H7N5O2+·SO42-·H2O, the guaninium cation, the sulfate anion and the water molecule form a network of hydrogen bonds. The structure consists of layers of guaninium ions and water molecules parallel to the diagonal of the ac plane, linked by strong hydrogen bonds.
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