STATE OF THE TB(III) AND ND(III) IONS IN CONCENTRATED-SOLUTIONS OF ELECTROLYTES OF VARIOUS TYPES

An investigation of the state of terbium and neodymium ions in solutio ns of various supporting electrolytes was conducted using an analysis of the electronic absorption spectra of Nd(II) and the fluorescence sp ectra of Tb(III). The supporting electrolytes selected were the salts LiSCN, LiCl, MgCl2, NaCl, and CsCl, the concentration of which was var ied within wide limits. The neodymium and terbium chloride concentrati ons were kept constant in all the solutions and equal to 0.015 and 0.0 3 M, respectively. To eliminate the influence of hydrolysis on the exp erimental results, all the solutions were acidified with hydrochloric acid (0.1 M).