[Ni(C10H5N3O4)(H2O)]	Dx = 1.959 Mg m−3
Mr = 307.88	Melting point: not measured K
Monoclinic, P21/c	Mo Kα radiation, λ = 0.71073 Å
a = 7.5117 (15) Å	Cell parameters from 2377 reflections
b = 11.400 (2) Å	θ = 3.3–27.4°
c = 12.896 (4) Å	µ = 1.88 mm−1
β = 109.04 (3)°	T = 293 K
V = 1043.9 (4) Å3	Block, green
Z = 4	0.21 × 0.16 × 0.13 mm
F(000) = 624