SOLUBILITY AND SPECTROCHEMICAL CHARACTERISTICS OF SYNTHETIC CHERNIKOVITE AND META-ANKOLEITE

Chernikovite and meta-ankoleite were synthesized with a relatively hig h crystallinity and the compounds were identified by means of chemical analysis and X-ray diffraction. The infrared spectra were recorded an d the bands assigned. From the luminescence spectra, the band-gap ener gy for both compounds was calculated as 2.35 eV, indicating that they must be considered as insulators. The dependence of the solubilities o f these compounds on the acidity of the solution was studied, and the dominant ionic species were determined. The pK(sp) values of chernikov ite and meta-ankoleite were found to be 22.73 +/- 0.24 and 24.30 +/- 0 .81 respectively.