Wakefieldite ((La,Ce,Nd,Y)VO4) is an uncommon rare-earth element vanadate mineral.
In terms of crystal structure, it is the vanadate analog of the rare-earth phosphate mineral xenotime.
Unlike xenotime, it is more favorable for wakefieldite to contain the lighter rare-earth elements over the heavier ones.
Due to the lanthanide contraction, the heavier rare earths have smaller ionic radii than the lighter ones.
[3] Wakefieldite was first described for an occurrence in the Evans Lou mine, St. Pierre de Wakefield, Quebec, Canada[4] and later designated Wakefieldite-(Y).