Multiple charge density wave transitions in Gd$_2$Te$_5$
  Diffraction measurements performed via transmission electron microscopy and high resolution X-ray scattering reveal two distinct charge density wave transitions in Gd$_2$Te$_5$ at $T_{c1}$ = 410(3) and $T_{c2}$ = 532(3) K, associated with the \textit{on}-axis incommensurate lattice modulation and \textit{off}-axis commensurate lattice modulation respectively. Analysis of the temperature dependence of the order parameters indicates a non-vanishing coupling between these two distinct CDW states. 
K. Y. Shin, N. Ru, C. L. Condron, Y. Q. Wu, M. J. Kramer, M. F. Toney,   I. R. Fisher