Rietveld refinement of the RNi4B compounds (R = Gd, Tb, Er)

Based on Rietveld refinement of X-ray powder diffraction data collected from RNi4B samples (R = Gd, Tb, Er) annealed at 1070 K, a CeCo4B structure type (space group P6/mmm (N191), Z = 2) was determined for all compounds.