| C2H7N4O+·C12H4N7O12− | Z = 2 |
| Mr = 541.34 | F(000) = 552 |
| Triclinic, P1 | Dx = 1.795 Mg m−3 |
| a = 7.9764 (16) Å | Mo Kα radiation, λ = 0.71073 Å |
| b = 8.6658 (17) Å | Cell parameters from 15866 reflections |
| c = 15.278 (3) Å | θ = 2.4–29.6° |
| α = 87.79 (3)° | µ = 0.16 mm−1 |
| β = 76.18 (3)° | T = 173 K |
| γ = 77.59 (3)° | Platelet, red |
| V = 1001.4 (3) Å3 | 0.40 × 0.20 × 0.10 × 0.40 (radius) mm |