nm⁻¹
per nanometer
Wavenumberexact by definition
The reciprocal nanometre is 10⁹ m⁻¹. It is the unit of momentum transfer in small-angle scattering and of reciprocal lattice vectors when the direct lattice is described in nanometres, as it usually is for polymers, colloids and nanostructures.
| 1 nm⁻¹ | 1,000,000,000 m⁻¹ |