FIG. 2.

Room temperature X-ray powder diffraction patterns of Nd_1–xSr_xNiO₃ (0.0 ⩽ x ⩽ 0.2) and corresponding Rietveld fitting results using Pbnm space group. The black dots are the observed data, the red line is the calculated fit, and gray line shows the difference between the two. Positions of allowed reflections are indicated by vertical black (Nd_1–xSr_xNiO₃) and red (NiO) lines.