K₄Ni₃O₆ and KNa₂Ni₂O₄, New Quasi One‐Dimensional ­Oxonickelates(II, III)

Abstract

Two new quasi one-dimensional alkali metal oxonickelates, K 4 Ni 3 O 6 and KNa 2 Ni 2 O 4 , were obtained by the azide/nitrate route starting from respective stoichiometric mixtures of KN 3 , KNO 3 , NaN 3 , NaNO 3 , and NiO. According to the X-ray analyses of the crystal structures [K 4 Ni 3 O 6 : C2/m, Z = 2, a = 899,53(3), b = 610,24(2), c = 778.75(2) pm, β = 91.665(2)°, R 1 = 0.030, wR 2 = 0.088; KNa 2 Ni 2 O 4 : P2 1 /n, Z = 4, a = 573.70(2), b = 1072.89(3), c = 844.93(2) pm, β = 102.916(2)°, R 1 = 0.038, wR 2 = 0.108], the main feature common to