(CH6N3)5[H2PtV9O28]	F(000) = 2704
Mr = 1404.01	Dx = 2.567 Mg m−3
Monoclinic, P21/n	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2yn	Cell parameters from 9860 reflections
a = 12.8861 (3) Å	θ = 2.3–28.3°
b = 18.5137 (5) Å	µ = 6.15 mm−1
c = 15.2299 (4) Å	T = 147 K
β = 91.143 (1)°	Tetragonal prism, dark brown
V = 3632.67 (16) Å3	0.09 × 0.06 × 0.05 mm
Z = 4