Distinction of space groups (I23 and I2₁3) and (I222 and I2₁2₁2₁) using coherent convergent-beam electron diffraction

A new method using the coherent CBED method is proposed to distinguish the special pairs of space groups (I23 and I2₁3) and of (I222 and I2₁2₁2₁), which have so far been indistinguishable.