SCANDIUM(III) HYDRATION IN AQUEOUS-SOLUTION FROM X-RAY-DIFFRACTION AND X-RAY-ABSORPTION FINE-STRUCTURE MEASUREMENTS

Measurements of X-ray diffraction (XD) on 1 and 3 M Sc(ClO4)(3) aqueou s solutions and of X-ray absorption fine structure (XAFS) on a 4.6 M S c(CF3SO3)(3) aqueous solution have been made at room temperature. Both the XD and XAFS data have revealed that about seven water molecules a re bound to a Sc3+ ion with a Sc3+-H2O distance of 2.18 Angstrom. The results are discussed with those obtained by Raman spectroscopy and si ngle crystal X-ray diffraction, (C) 1997 Published by Elsevier Science B.V.