V Balaram - Treatise on Geochemistry; Anbar, A., Weis, D., Eds, 2023 - researchgate.net
Rare earth elements (REE: La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu), and
Y and Sc because of their similar physical and chemical properties very often occur together …