| Na4Ni7(AsO4)6 | F(000) = 2520 |
| Mr = 1336.3 | Dx = 4.505 Mg m−3 |
| Monoclinic, C2/m | Mo Kα radiation, λ = 0.71073 Å |
| Hall symbol: -C 2y | Cell parameters from 38754 reflections |
| a = 14.5383 (11) Å | θ = 2.1–33.3° |
| b = 14.5047 (11) Å | µ = 16.76 mm−1 |
| c = 10.6120 (8) Å | T = 293 K |
| β = 118.299 (2)° | Irregular, brown |
| V = 1970.3 (3) Å3 | 0.07 × 0.06 × 0.04 mm |
| Z = 4 |