Abstract
Two new hydrous diarsenates, Mg2As2O7.2H2O (dimagnesium diarsenic heptaoxide dihydrate) and Zn2As2O72H2O (dizinc diarsenic heptaoxide dihydrate), have been synthesized. The two compounds are isotypic. Their frameworks are characterized by zigzag infinite chains of edge-sharing MO6 octahedra linked by As2O7 groups to form a three-dimensional architecture with intersecting tunnels. Water O atoms are tightly bound to Mg or Zn atoms with the H atoms directed into the tunnels. Both the MO6 octahedra and the AsO4 tetrahedra are more distorted in the Zinc compound than in the magnesium compound.
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Schedule a callMore From: Acta crystallographica. Section C, Crystal structure communications
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