Citation: Mesbah, Adel; Clavier, Nicolas; Elkaim, Erik; Szenknect, St\'ephanie; Dacheux, Nicolas (2017). In pursuit of the rhabdophane crystal structure: from the hydrated monoclinic LnPO 4 .0.667H 2 O to the hexagonal LnPO 4 (Ln = Nd, Sm, Gd, Eu and Dy). Journal of Solid State Chemistry, 249, pp. 221-227.