In situ Raman investigation of Dy complexation in Cl-bearing aqueous solutions at 20–300 °C

The first in situ Raman spectroscopic measurements of Dy speciation in hydrothermal fluids to 300 °C indicate that the Dy 3+ aqua ion ( v 1,Dy–O ) is stable in acidic DyCl 3 solutions up to 200 °C above which Dy chloride complexes ( v Dy–Cl ) predominate.