Muktimoy Chaudhury1, Anupam Roy1, B. K. Ghosh1, K. Nag1
1Indian Association for the Cultivation of Science, Department of Inorganic Chemisty, Calcutta 700 032, India
Tóm tắt
Abstract
Variable temperature EPR spectra of KNiIO6 · 0.5 H2O have established that the paramagnetic behavior of this compound (~ 1 BM) is due to the presence of nickel(III) atoms which have occupied some nickel(IV) sites in the crystal lattices. Change of spectral pattern from rhombic (77 K) to isotropic (300 K) is due to a dynamic Jahn-Teller effect. Electrical conductivity measurement has shown it to be a poor semiconductor. KNiIO6 · 0.5 H2O on heating at 300 °C forms K2Ni2I2O9 which is stable in the temperature range 300-400 °C. Chemical reactivities and reflectance spectrum of this compound have indicated it to be K2Ni2
III2
VIO9.
