35Cl NQR and XRD Studies on Cs2[Ag(I)xAu(I)1−xCl2][Au(III)Cl4]

35Cl NQR and XRD have been investigated on the solid solution Cs2[Ag(I) x Au(I)1 − x Cl2][Au(III)Cl4] which yielded NQR lines by annealing. The crystal forms a tetragonal cell in the whole range of x. However, a change of the modification occurs at x ≈ 0.85. The increase of c and decrease of a were observed in the range of 0.0 ≤ x ≤ 0.7.