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inorganic compounds
The structure of the title compound, sodium indium diarsenate(4-), consists of corner-sharing InO6 octahedra and layers of the diarsenate groups stack alternately parallel to [010]. The framework delimits cages where four Na+ cations per unit cell are located. The structure is closely related to that of NaFeP2O7-II, but crystallizes in a different space group.