[Sm2(C8H2NO6)2(H2O)5]·H2O	F(000) = 1576
Mr = 825.01	Dx = 2.498 Mg m−3
Monoclinic, P21/n	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2yn	Cell parameters from 19369 reflections
a = 18.426 (4) Å	θ = 3.2–27.5°
b = 6.9082 (14) Å	µ = 5.40 mm−1
c = 18.583 (4) Å	T = 293 K
β = 111.98 (3)°	Block, colorless
V = 2193.6 (8) Å3	0.43 × 0.28 × 0.21 mm
Z = 4