[Co(C8H6NO4)2(H2O)4]	F(000) = 506
Mr = 491.27	Dx = 1.633 Mg m−3
Monoclinic, P21/n	Mo Kα radiation, λ = 0.71073 Å
a = 5.4431 (3) Å	Cell parameters from 2154 reflections
b = 6.4313 (4) Å	θ = 2.9–27.0°
c = 28.5697 (15) Å	µ = 0.93 mm−1
β = 92.762 (2)°	T = 296 K
V = 998.96 (10) Å3	Prism, light-orange
Z = 2	0.32 × 0.24 × 0.20 mm