dr seredin, russian scientist has classed some REE's as 'critical' or 'excessive'
"The paper defines Nd, Eu, Tb, Dy, Er and Y as being critical REEs, and defines Ce, Ho, Tm, Yb and Lu as being excessive REEs. The outlook coefficient is defined as the ratio"
Review Of A Proposed New Method For Evaluating Rare-Earth Deposits
RMR at this very early stage have 3 of the 'critical' elements listed in the report
