THE 1ST BASIC OXOINDATE - NA26O3[INO4]4

For the first time Na26O3[InO4]4 was obtained by annealing intimate mi xtures of Na2O, CdO and elemental In (molar ratio 3.5:1.0:2.0) in clos ed Ni-cylinders (30 days, 600-degrees-C) in form of yellow single crys tals. The structure determination by four circle diffractometer data ( MoKalpha, 921 out of 921 I(o)(hkl), R = 2.53, R(w) = 2.18%) confirms t he space group 143dBAR (cubic) with a = 1 427.37 pm and Z = 4. All kat ion are surrounded by tetrahedron of O2-. In3+ is coordinated with O(1 ) and O(2) (without O(3)) only. There are ''isolated'' [InO4]-tetrahed ra. The Madelung Part of Lattice Energy, MAPLE, the Mean Fictive Ionic Radii, MEFIR, Effective Coordination Numbers, ECoN, and Charge Distri bution, CHARDI, are calculated.