The Ni-V-O chemical system contains multiple ternary compounds with intriguing magnetic and electronic properties. Ni 3 V 2 O 8 forms a Kagomé staircase structure with four lowtemperature magnetic transitions and has emerged as a component in new supercapacitors. Both NiV 3 O 8 , a ferromagnet with transitions at 2 and 27 K, 7 and Ni 2 V 2 O 7 , a 3D spin-1 antiferromagnet, 8 have shown promising electrochemical properties for Li-ion battery applications. Likewise, NiVO 3 and NiV 2 O 6 have demonstrated high, stable discharge capacities as anode materials in Li-ion batteries. As a result, Li et al. have proposed using NiV 2 O 6 as an electrode for flexible energy storage devices in wearable technology. Another compound in the system, hematite-type V 2-x Ni x O 3 (0 < x < 0.75), is a wide solubility limit magnetic material with a tunable Mott transition temperature. These phases are plotted in Fig. . Gianoglio and Ramonda reported an additional ternary phase close to these others in composition and designated it as Ni 7 V 5 O 17 based on their reactant powders' nominal Ni:V ratio and vanadium oxidation state. While d-spacings and relative intensities from X-ray diffraction data were reported for the new phase, its composition was not confirmed, the crystal structure was not determined, and the magnetic properties were not explored. Here, we show this phase to have an approximate composition of Ni 4 V 3 O 10 , a unique structure type, and frustrated antiferromagnetic ordering.