Trimethyl­ammonium tetra­fluoro­borate at 100 K

The crystal structure of the title compound, C₃H₁₀N⁺·BF₄⁻, has been redetermined at 100 K and shows the BF₄⁻ anion to be ordered at this temperature. Both the anion and the cation lie on a mirror plane and they are connected by N—H...F and C—H...F hydrogen bonds.