inorganic compounds
The three-dimensional framework of tetrasodium titanium nonaoxodiarsenate, Na4TiAs2O9, consists of infinite [TiO(AsO4)2]n chains linked together by Na+ cations. The structure is compared with those of Na3SbO(PO4)2 (P212121) and Na4TiP2O9 (P2/c, Ibam and Bmcm).