In addition to magnetometry data, POW-GEN neutron powder diffraction data collected while cooling from 80 K to around 9 K confirms this transition. A significant magnetic peak that appears at d = 5.57 Å indicates that the transition at 38 K corresponds to Ni 4 V 3 O 10 . The onset of this peak can be observed using a contour plot con-structed with 5 K diffraction data bins (Fig. ). Its intensity relative to the background is plotted in Fig. . Additional low intensity peaks are apparent in the long isothermal neutron powder diffraction collection at 6.4 K at d = 10.40, 10.06, 5.57, 5.39, 3.97, 2.88, and 2.36 Å. These peaks are tentatively assigned to Ni 4 V 3 O 10 and are plotted in Fig. .